spoj_cpp_clean/ADDREV/ADDREV-13.cpp

#pragma warning(disable:4018)  // signed/unsigned mistatch
#pragma warning(disable:4244)  // w64 to int cast
#pragma warning(disable:4267)  // big to small -- possible loss of data
#pragma warning(disable:4786)  // long identifiers
#pragma warning(disable:4800)  // forcing int to bool
#pragma warning(disable:4996)  // deprecations
#include "assert.h"
#include "ctype.h"
#include "float.h"
#include "math.h"
#include "stdio.h"
#include "string.h"
#include "stdlib.h"
#include "stdarg.h"
#include "time.h"
#include "algorithm"
#include "numeric"
#include "functional"
#include "utility"
#include "bitset"
#include "vector"
#include "list"
#include "set"
#include "map"
#include "queue"
#include "stack"
#include "string"
#include "sstream"
#include "iostream"
#define all(v) (v).begin(), (v).end()
typedef long long i64;
template <class T> void make_unique(T& v) {sort(all(v)); v.resize(unique(all(v)) - v.begin());}
using namespace std;

int rev(int x){
	int res = 0;
	do{
		res *= 10;
		res += x % 10;
		x /= 10;
	}while(x > 0);
	return res;
}

int main(){
	int T; scanf("%d", &T);
	for(int t=0; t<T; ++t){
		int a, b; scanf("%d %d", &a, &b);
		a = rev(a), b = rev(b);
		printf("%d\n", rev(a+b));
	}
	return 0;
}