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#include <iostream>
#include <cstdio>
using namespace std;
long int rev(long int num)
{
long int reverseNum;
reverseNum=0;
while(num!=0)
{
reverseNum*=10;
reverseNum+=num%10;
num=num/10;
}
return reverseNum;
}
int main()
{
long int num1,num2,num,t;
cin>>t;
while(t--)
{
scanf("%ld %ld",&num1,&num2);
num=rev(num1)+rev(num2);
printf("%ld\n",rev(num));
}
return 0;
}
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