/* * Written by Nitin Kumar Maharana * nitin.maharana@gmail.com */ #include #include #include using namespace std; string input; map memory; map::iterator it; int len; unsigned long long findNumDecoding(int index) { if(index == len || index == len-1) return 1ull; it = memory.find(index); if(it != memory.end()) return (it->second); unsigned long long result; if(input[index] > '2' || (input[index] == '2' && input[index+1] > '6') || (index+2 < len && input[index+2] == '0')) result = findNumDecoding(index+1); else if(input[index+1] == '0') result = findNumDecoding(index+2); else result = (findNumDecoding(index+1) + findNumDecoding(index+2)); memory.insert(make_pair(index, result)); return result; } int main(void) { cin >> input; while(input != "0") { len = input.length(); cout << findNumDecoding(0) << endl; input.clear(); memory.clear(); cin >> input; } return 0; }