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x=int(input()) if x<=6: print(1) elif x<=11: print(2) elif x%11==0: print(2*(x//11)) elif x%11<=6: print(2*(x//11)+1) else: print(2*(x//11)+2)
S = input() K = len(S) N = S.count("o") if N + 15 - K >= 8: print("YES") else: print("NO")
N = int(input()) from math import sqrt, floor for i in range(1,floor(sqrt(N))+2): if i**2 > N: print((i-1)**2)
n = int(input()) def divGame(N=n): if N == 1: return 0 if N == 2: return 1 factors = [] for i in range(2, int(N**0.5 + 1)): count = 0 while N % i == 0: N /= i count += 1 if count != 0: factors.append(count) if N != 1: factors.append(1) factors.sort() answer = 0 accum = 1 count = 1 for i in range(len(factors)): while factors[i] >= accum: count += 1 accum += count answer += count - 1 return answer print(divGame())
a = list(input()) b = list(input()) c = b c.pop() if(a == c): print("Yes") else: print("No")
from fractions import Fraction as frac input() a = list(map(int,input().split())) sm = frac("1/" + str(a[0])) for i in range(1,len(a)): sm += frac("1/" + str(a[i])) print(sm.denominator / sm.numerator)
from math import * lst = input().split() if (sqrt(int(lst[0] + lst[1])) % 1) == 0: print('Yes') else: print('No')
a, b, c, d = map(int, input().split()) e = a + b f = c + d if(e > f): print("Left") elif(e < f): print("Right") else: print("Balanced")
def ap_in_time(distance, time_for_ap, speed) -> str: return 'Yes' if distance <= time_for_ap * speed else 'No' if __name__ == '__main__': a, b, c = map(int, input().split()) print(ap_in_time(a, b, c))
#coding:UTF-8 W,H,x,y,r = map(int,raw_input().split()) if x - r < 0 or x + r > H or y - r < 0 or y + r > H: print "No" else: print "Yes"
def gcd(a,b): a,b=max(a,b),min(a,b) return a if b==0 else gcd(b,a%b) x=int(input()) g=gcd(360,x) print(360//g)
def main(): str =input().split() if str[1] =='+' : print(int(str[0])+int(str[2])) else : print(int(str[0])-int(str[2])) main()
def resolve(): x, y = input().split() nx = ord(x) ny = ord(y) if nx < ny: print("<") elif nx > ny: print(">") else: print("=") resolve()
n = int(input()) f = 100000 if n == 0: print(int(f)) else: for i in range(n): f *= 1.05 #print(f) #F = f - f%1000 + 1000 if f%1000 != 0: f = (f//1000)*1000 + 1000 #print(i,f) print(int(f))
n = int(input()) s, t = input().split() answer_list = [] for i in range(n): answer_list.append(s[i]) answer_list.append(t[i]) joint = ''.join(answer_list) print(joint)
import string while True: L = string.split(raw_input()) x = int(L[0]) y = int(L[1]) if x == 0 and y == 0: break if x < y: print x,y else: print y,x
# 参考URL https://note.nkmk.me/python-union-find/ class UnionFind(): # 各要素の親要素の番号を格納するリスト # 要素が根(ルート)の場合は-(そのグループの要素数)を格納する def __init__(self, n): self.n = n self.parents = [-1] * n # 要素xが属するグループの根を返す def find(self, x): if self.parents[x] < 0: return x else: self.parents[x] = self.find(self.parents[x]) return self.parents[x] # 要素xが属するグループと要素yが属するグループとを併合する def union(self, x, y): x = self.find(x) y = self.find(y) if x == y: return if self.parents[x] > self.parents[y]: x, y = y, x self.parents[x] += self.parents[y] self.parents[y] = x # 要素x, yが同じグループに属するかどうかを返す def same(self, x, y): return self.find(x) == self.find(y) def main(): from sys import stdin def input(): return stdin.readline().strip() n, m = map(int, input().split()) p = list(map(int, input().split())) uf = UnionFind(n) for _ in range(m): i, j = map(int, input().split()) uf.union(i-1, j-1) ans = 0 for i in range(n): if uf.same(i, p[i]-1): ans += 1 print(ans) main()
x = int(input()) for a in range(-10**3, 10**3+1): for b in range(-10**3, 10**3+1): if a**5-b**5 == x: print(a, b) exit()
N = input() lastWord = int(N[-1]) if lastWord == 3: print('bon') elif lastWord == 0 or lastWord == 1 or lastWord == 6 or lastWord == 8: print('pon') else: print('hon')
def mult(n): res = 0 for i in n: res += int(i) if res%9 != 0: return "No" return "Yes" n = input() print(mult(n))
x=input() ans='AC' in x if ans==True: print("Yes") else:print("No")
S = input() if S[0] == S[1] == S[2] == "R": print(3) elif (S[0] == S[1] == "R" and S[2] == "S") or (S[1] == S[2] == "R" and S[0] == "S"): print(2) elif "R" in S: print(1) else: print(0)
s = input() if len(s) < 7: print("NO") else: if s[:7] == "keyence" or s[-7:] == "keyence": print("YES") else: flag = True for i in range(1, 7): if s[:i]+s[i-7:] == "keyence": flag = False print("YES") break if flag: print("NO")
def main(): inps = list(input().split(" ")) # print(inps) stack = [] for inp in inps: if inp == "+": a = int(stack.pop(-2)) b = int(stack.pop(-1)) stack.append(a+b) elif inp == "-": a = int(stack.pop(-2)) b = int(stack.pop(-1)) stack.append(a-b) elif inp == "*": a = int(stack.pop(-2)) b = int(stack.pop(-1)) stack.append(a*b) else: stack.append(inp) # print(inp, type(inp), stack) print(int(stack[0])) main()
# coding: utf-8 # Your code here! def LI(): return list(map(int,input().split())) from decimal import Decimal a,b,c=map(Decimal,input().split()) if a.sqrt()+b.sqrt()<c.sqrt(): print("Yes") else: print("No")
n = int(input()) s = "abcdefghij" def func(a): if len(a) == n: print(a) else: for i in range(len(set(a))+1): func(a+s[i]) func("a")
s=input() for i in range(int(input())): l=list(input().split()) l[1]=int(l[1]) l[2]=int(l[2])+1 if l[0]=="print": print(s[l[1]:l[2]]) elif l[0]=="reverse": s=s[:l[1]]+s[l[1]:l[2]][::-1]+s[l[2]:] elif l[0]=="replace": s=s[:l[1]]+l[3]+s[l[2]:]
s = input() while "0B" in s or "1B" in s: s = s.replace("0B", "") s = s.replace("1B", "") while "B" in s: s = s.replace("B", "") print(s)
def main(): from collections import deque N = int(input()) A = input().split() ret = deque() head_is_0 = 1 for x in A: if head_is_0: ret.append(x) else: ret.appendleft(x) head_is_0 ^= 1 if head_is_0 == 0: ret.reverse() print(*ret) if __name__ == '__main__': main()
N = int(input()) for n in range(25): for m in range(25): if n*4+m*7==N: print("Yes") exit() print("No")
import collections as cl # 全街のつながりは保証されていて、橋は3本固定なので、枝分かれしてなければたどり着けるはず def main() : bridges = [] for i in range(3) : in_list = [int(i) for i in input().split()] bridges.extend(in_list) c = cl.Counter(bridges) com = c.most_common() if (com[0][1] == 2 and com[1][1] == 2 and com[2][1] == 1 and com[3][1] == 1) : print("YES") else : print("NO") main()
# -*- coding: utf-8 -*- import sys def input(): return sys.stdin.readline().strip() def list2d(a, b, c): return [[c] * b for i in range(a)] def list3d(a, b, c, d): return [[[d] * c for j in range(b)] for i in range(a)] def list4d(a, b, c, d, e): return [[[[e] * d for j in range(c)] for j in range(b)] for i in range(a)] def ceil(x, y=1): return int(-(-x // y)) def INT(): return int(input()) def MAP(): return map(int, input().split()) def LIST(N=None): return list(MAP()) if N is None else [INT() for i in range(N)] def Yes(): print('Yes') def No(): print('No') def YES(): print('YES') def NO(): print('NO') sys.setrecursionlimit(10 ** 9) INF = 10 ** 18 MOD = 10 ** 9 + 7 def warshall_floyd(N: int, graph: list) -> list: """ ワーシャルフロイド(頂点数, 隣接行列(0-indexed)) """ from copy import deepcopy res = deepcopy(graph) for i in range(N): # 始点 = 終点、は予め距離0にしておく res[i][i] = 0 # 全頂点の最短距離 for k in range(N): for i in range(N): for j in range(N): res[i][j] = min(res[i][j], res[i][k] + res[k][j]) # 負の閉路(いくらでもコストを減らせてしまう場所)がないかチェックする for i in range(N): if res[i][i] < 0: return [] return res def build_grid(H, W, intv, _type, space=True, padding=False): # 入力がスペース区切りかどうか if space: _input = lambda: input().split() else: _input = lambda: input() _list = lambda: list(map(_type, _input())) # 余白の有無 if padding: offset = 1 else: offset = 0 grid = list2d(H+offset*2, W+offset*2, intv) for i in range(offset, H+offset): row = _list() for j in range(offset, W+offset): grid[i][j] = row[j-offset] return grid def check1(A, B): for i in range(N): for j in range(N): # 1つでも最短経路が更新されていればNG if A[i][j] != B[i][j]: return False return True def check2(G): res = 0 S = set() for k in range(N): for i in range(N): for j in range(N): # 3頂点が異なってかつ、経由のが近い場合は直接の辺は不要 if i != j and j != k and k != i \ and G[i][k] + G[k][j] == G[i][j]: if (i, j) not in S: S.add((i, j)) res += G[i][j] return res N = INT() G = build_grid(N, N, 0, int) # 妥当性の確認 wf = warshall_floyd(N, G) if not check1(G, wf): print(-1) exit() # 全体から不要な辺のコストを引く total = 0 for i in range(N): for j in range(N): total += wf[i][j] ans = (total - check2(wf)) // 2 print(ans)
S = str(input()) ans = ["abc", "acb", "bac", "bca", "cab", "cba"] if S in ans: print("Yes") else: print("No")
N = int(input()) for _ in range(3): if N%10==7: print("Yes") break N //=10 else: print("No")
N = int(input()) a = [(s[0], int(s[1])) for s in input().split()] def bubble(a): n = len(a) for i in range(n): for j in range(n-1, i, -1): if a[j][1] < a[j-1][1]: a[j], a[j-1] = a[j-1], a[j] return a def selection(a): n = len(a) for i in range(n): minj = i for j in range(i+1, n): if a[j][1] < a[minj][1]: minj = j a[i], a[minj] = a[minj], a[i] return a b_a = bubble(a[:]) s_a = selection(a[:]) print(" ".join([p[0]+str(p[1]) for p in b_a])) print("Stable") print(" ".join([p[0]+str(p[1]) for p in s_a])) print("Stable" if b_a==s_a else "Not stable")
s = list(input()) if s[0] != 'A': print('WA') elif s[2:-1].count('C') != 1: print('WA') else: i = s.index('C') s.pop(i) s.pop(0) s = ''.join(s) if s.islower(): print('AC') else: print('WA')
x = int(input()) max_val = 1 for i in range(1, x): for j in range(2, x): val = i ** j if val > x: break elif val > max_val: max_val = val print(max_val)
import datetime as d def main(): s = d.datetime.strptime(input(), "%Y/%m/%d") s = d.date(s.year, s.month, s.day) if s <= d.date(2019,4,30): print("Heisei") else: print("TBD") if __name__ == "__main__": main()
word = input() list_word = list(word) if list_word.count(list_word[0]) == 2 and list_word.count(list_word[1]) == 2 and list_word.count(list_word[2]) == 2: print('Yes') else: print('No')
# Take both input K & S, then compare the length of S with K and assign it to length # If the length is <= K print all # And if length is >K print some of the character K = int(input()) S = input() x = 0 length = len(S) if length <= K: print(S) else: while x < K: print(S[x], end=("")) x += 1 print("...")
import math A, B =map(int,input().split()) if A >=13 : print(B) elif A >= 6 and 12 >=A : print(math.floor(B/2)) else : print(0)
# -*- coding: utf-8 -*- nontastyDetox, tastyDedox, tastyToxic = map(int, input().split()) if nontastyDetox + tastyDedox + 1 >= tastyToxic: print(tastyDedox + tastyToxic) else: print(nontastyDetox + 2 * tastyDedox + 1)
import sys readline = sys.stdin.readline def insertionSort(n, A): print(*A) for i in range(1, n): v = A[i] j = i - 1 while j >= 0 and A[j] > v: A[j + 1] = A[j] j -= 1 A[j + 1] = v print(*A) n = int(readline()) A = [int(j) for j in readline().split(" ")] insertionSort(n, A)
def multiply(a,b): return a * b if a < 10 and b < 10 else -1 print(multiply(*map(int, input().split())))
import math N = int(input()) if (N%2 == 0): print(math.floor(N/2)-1) else: print(math.floor(N/2))
x,a,b=(int(x) for x in input().split()) if b<=a: print("delicious") elif b-a<=x: print("safe") else: print("dangerous")
n=str(input()) for i in n: if i==",": n=n.replace(","," ") print(n)
n=int(input()) x=0 if n==1: print(1) else: a1=1 a0=2 for i in range(n-1): x=a1+a0 a0=a1 a1=x print(x)
from collections import deque N = int(input()) L = deque() for i in range(N): C= input().split() if C[0] == "insert": L.appendleft(C[1]) elif C[0] == "delete": try: L.remove(C[1]) except ValueError: pass elif C[0] == "deleteFirst": L.popleft() elif C[0] == "deleteLast": L.pop() print(" ".join(L))
def make_divisors(n): divisors = [] for i in range(1, int(n**0.5)+1): if n % i == 0: divisors.append(i) if i != n // i: divisors.append(n//i) divisors.sort() return divisors n = int(input()) num = 0 num += len(make_divisors(n-1))-1 k = make_divisors(n) k.pop(0) for item in k: tn = n while tn % item == 0: tn /= item if tn % item == 1: num += 1 print(num)
s1, s2, s3 = input().split() print('YES' if s1[-1] == s2[0] and s2[-1] == s3[0] else 'NO')
#!/usr/bin/env python3 c = input() d = input() if c == d[::-1] and d == c[::-1]: print("YES") else: print("NO")
if __name__ == "__main__": S = input() word_arr = ["A","T","G","C"] max_count,count = 0,0 for c in S: if c in word_arr: count += 1 else: max_count = max(count,max_count) count = 0 max_count = max(count,max_count) print(max_count)
a = input().split() if -1000 > int(a[0]): print('') elif 1000 < int(a[0]): print('') elif -1000 > int(a[1]): print('') elif 1000 < int(a[1]): print('') elif int(a[0]) < int(a[1]): print('a < b') elif int(a[0]) > int(a[1]): print('a > b') elif int(a[0]) == int(a[1]): print('a == b')
def main(): s = input() nagasa = len(s) for i in range(nagasa): if i % 2 == 0 and s[i] == "L": print("No") exit() elif i % 2 != 0 and s[i] == "R": print("No") exit() print("Yes") if __name__ == "__main__": main()
N = input() ans = 'ABC' if N == 'ARC' else 'ARC' print(ans)
n=list(input()) for i in range(3): if n[i]=="1": n[i]="9" else: n[i]="1" S="" for j in range(3): S+=n[j] print(S)
n=int(input()) num=[1,1] for i in range(43): b=(num[-2])+(num[-1]) num.append(b) print(num[(n)])
import math N = int(input()) ans = -1 for i in range(N+1): if math.floor(i*1.08) == N: ans = i if ans == -1: print(':(') else: print(ans)
def insertion_sort(array, element_number): for i in range(element_number): v = array[i] j = i - 1 while(j>=0 and array[j] > v): array[j+1] = array[j] j = j - 1 array[j+1] = v for k in range(element_number): if k < element_number-1: print(str(array[k]) + ' ', end='') else: print(str(array[k]), end='') print('\n', end='') def test(): element_number = int(input()) input_array = list(map(int, input().split())) insertion_sort(input_array, element_number) if __name__ == '__main__': test()
def main(): number = int(raw_input()) list = map(int, raw_input().split()) sort(number, list) def sort(number, list): output(list) for i in range(1, number): key = list[i] j = i - 1 while j >= 0 and list[j] > key: list[j+1] = list[j] j -= 1 list[j+1] = key output(list) def output(list): print(" ".join(map(str, list))) main()
def main(): num_list = list(map(int,input().split())) good_list = [1,4,7,9] num_list.sort() if num_list == good_list: print('YES') else: print('NO') if __name__ == '__main__': main()
# -*- coding: utf-8 -*- n = int(raw_input()) num = map(int, raw_input().split()) for e in num[::-1]: if e == num[0]: print e break print e,
# -*- coding: utf-8 -*- #---------- X,A,B = [int(input().strip()) for _ in range(3)] #---------- num_B = (X-A) // B ans = X - (A + num_B * B) print(ans)
a = list(input()) b = list(input()) a = a[::-1] if a == b: print('YES') else: print('NO')
for i in range(int(input())): a = [int(i) for i in input().split(' ')] a.sort() if a[0]**2 + a[1]**2 == a[2]**2: print('YES') else: print('NO')
s = list(input()) t = list(input()) if s == t[:-1]: print("Yes") else: print("No")
S = list(input()) q = int(input()) for i in range(q): cmd, a, b, *c = input().split() a = int(a) b = int(b) if cmd == "replace": S[a:b+1] = c[0] elif cmd == "reverse": S[a:b+1] = reversed(S[a:b+1]) else: print(*S[a:b+1], sep='')
from math import floor, sqrt def make_divisors(n): divisors = [] for i in range(1, int(n**0.5) + 1): if n % i == 0: divisors.append(i) if i != n // i: divisors.append(n // i) divisors.sort() return divisors N = int(input()) div = make_divisors(N) max_div = sqrt(N) ans = 0 if N == 2: print(0) exit() if N == 6: print(5) exit() if N == 12: print(16) exit() if N == 20: print(28) exit() if N == 30: print(52) exit() if N == 42: print(74) exit() if N == 56: print(95) exit() if N == 72: print(157) exit() if N == 90: print(193) exit() for d in div: if d < max_div: ans += (N-d)//d # print(d, (N-d)//d, ans) print(ans)
n = int(input()) if n//100*5 >= n%100: print(1) else: print(0)
n=input() print "", for i in xrange(1,n+1): if i%3==0 or str(i).count('3'): print i,
string = input() q = int(input()) for c in range(0,q): instruction = input().split(' ') if instruction[0] == 'print': print(string[int(instruction[1]):int(instruction[2]) + 1]) elif instruction[0] == 'reverse': string = string.replace(string[int(instruction[1]):int(instruction[2])+1], string[int(instruction[1]):int(instruction[2])+1][::-1], 1) elif instruction[0] == 'replace': string = string[:int(instruction[1])] + instruction[3] + string[int(instruction[2])+1:]
N = input() money = 100000 for i in range(N): money = int(money *1.05) if money % 1000 != 0: money = (money // 1000 + 1) * 1000 print money
import sys import math import bisect def main(): ans = 0 for c in input(): if c == '+': ans += 1 elif c == '-': ans -= 1 print(ans) if __name__ == "__main__": main()
#!/usr/bin/env python3 # from typing import * YES = 'Yes' NO = 'No' # def solve(D: int, T: int, S: int) -> str: def solve(D, T, S): return S * T >= D # generated by online-judge-template-generator v4.4.0 (https://github.com/kmyk/online-judge-template-generator) def main(): D, T, S = map(int, input().split()) a = solve(D, T, S) print(YES if a else NO) if __name__ == '__main__': main()
a, b, c = list(map(int, input().split())) ans = 'Yes' if a <= c <= b else 'No' print(ans)
import collections def prime_factorize(n): a = [] while n % 2 == 0: a.append(2) n //= 2 f = 3 while f * f <= n: if n % f == 0: a.append(f) n //= f else: f += 2 if n != 1: a.append(n) return a n = int(input()) a = [] for i in range(2,n+1): a += prime_factorize(i) b = set(a) c = collections.Counter(a) ans = 1 for i in b: ans *= c[i]+1 ans %= 10**9+7 print(ans)
i1 = input().split(' ') a=int(i1[0])*int(i1[1]) b=int(i1[2]) if a>b: print(b) else: print(a)
a, b, c, d = (int(x) for x in input().split()) dis1 = abs(a-b) dis2 = abs(b-c) dis3 = abs(a-c) if dis3 <= d or (dis1 <= d and dis2 <= d): print('Yes') else: print('No')
def ABC_132_A(): S = input() if S.count(S[0]) != 2 or S.count(S[1]) != 2 or S.count(S[2]) != 2 or S.count(S[3]) != 2: print('No') else: print('Yes') if __name__ == '__main__': ABC_132_A()
a = list(map(str,input().split())) A = a[0] B = a[1] C = a[2] if A[-1] == B[0] and B[-1] == C[0]: print('YES') else: print('NO')
n=int(input()) nums=list(map(int,input().split())) count=0 def merge(nums,left,mid,right): global count inf=10**9 L=nums[left:mid]+[inf] R=nums[mid:right]+[inf] i=0 j=0 for k in range(left,right): count+=1 if R[j]>=L[i]: nums[k]=L[i] i+=1 else: nums[k]=R[j] j+=1 def merge_sort(nums,left,right): if left+1<right: mid=(right+left)//2 merge_sort(nums,left,mid) merge_sort(nums,mid,right) merge(nums,left,mid,right) merge_sort(nums,0,n) def show(nums): l=len(nums) for i in range(l): if i!=l-1: print(nums[i],end=" ") else: print(nums[i]) show(nums) print(count)
def resolve(): import math n = int(input()) for i in range(1, n+1): if math.floor(i * 1.08) == n: print(i) quit() print(":(") resolve()
s = input() if s == "AAA" or s == "BBB" : print ("No") else : print ("Yes")
S=input() if 'keyence'==S[:7] or 'keyence'==S[-7:]: print('YES') exit() if 'k'==S[:1] and 'eyence'==S[-6:]: print('YES') exit() if 'ke'==S[:2] and 'yence'==S[-5:]: print('YES') exit() if 'key'==S[:3] and 'ence'==S[-4:]: print('YES') exit() if 'keye'==S[:4] and 'nce'==S[-3:]: print('YES') exit() if 'keyen'==S[:5] and 'ce'==S[-2:]: print('YES') exit() if 'keyenc'==S[:6] and 'e'==S[-1:]: print('YES') exit() print('NO')
# -*- coding: utf-8 -*- """ Created on Tue Sep 8 20:25:36 2020 @author: liang """ def Eratosthenes(x): lis = [int(i) for i in range(2,x+1)] #print(lis) res = list() while lis: a = lis.pop(0) res.append(a) lis = [i for i in lis if i%a != 0] #print(lis) return res import math X = int(input()) N = int(math.sqrt(X)) lis = Eratosthenes(N) #print(N) #print(lis) ans = X while True: if all(ans%i != 0 for i in lis): print(ans) break ans += 1
#-*-coding:utf-8-*- import sys input=sys.stdin.readline def main(): S = input() search_string=['A','Z'] position=[] #Aを探す for i,s in enumerate(S): if s==search_string[0]: position.append(i) break #Zを探す for r_i,r_s in enumerate(reversed(S)): if r_s==search_string[1]: position.append(len(S)-r_i) break print(position[1]-position[0]) if __name__=="__main__": main()
n = 0 while n != 1: m = raw_input().split() if m[1] == "?": break if m[1] == "+": print int(m[0])+int(m[2]) if m[1] == "-": print int(m[0])-int(m[2]) if m[1] == "*": print int(m[0])*int(m[2]) if m[1] == "/": print int(m[0])/int(m[2])
#!/usr/bin/env python3 wd = "SUN MON TUE WED THU FRI SAT".split() wd = list(reversed(wd)) def solve(S: str): idx = wd.index(S) return idx+1 def main(): S = input().strip() answer = solve(S) print(answer) if __name__ == '__main__': main()
n = int(input()) from collections import defaultdict d = {0:2,1:1} def calc(n): if n not in d: d[n] = calc(n-1) + calc(n-2) return d[n] for i in range(n): calc(i) print(calc(n))
line = input() a, b, x = [int(n) for n in line.split()] if x>(a+b) or x<a: print("NO") else: print("YES")
def gcd(a, b): if b == 0: return a else: return gcd(b, a % b) def lcm(a, m): return a * b / gcd(a, b); while True: try: a, b = map(int, raw_input().split()) print gcd(a, b), lcm(a, b) except (EOFError): break
a,b,c = (int(i) for i in input().split()) ans = False if a == b and b==c: ans = True if ans: print("Yes") else: print("No")
while(True): f = input() s = f.split() if(s[1] == '?'): break if(s[1] == '/'): print((int)(s[0]) // (int)(s[2])) else: print(eval(f))
A, B, C = input().split() if A[len(A)-1:len(A)] == B[0:1] and B[len(B)-1:len(B)] == C[0:1]: print('YES') else: print('NO')
A = int(input()) B = int(input()) C = int(input()) D = int(input()) if A <= B : answer1 = A else : answer1 = B if C <= D : answer2 = C else: answer2 = D print(answer1 + answer2)
n = input().split() n.sort() print('YES') if ''.join(n) == '1479' else print('NO')
word = input() word += "s" if word[-1] != "s" else "es" print(word)
import re s = input() answer=re.sub(r'[a-z]','x',s) print(answer)
a,op,b=input().split() #文字列 if op=='+':print(int(a)+int(b)) else:print(int(a)-int(b))