题解 | #数字反转#

#include <string>
#include <iostream>

using namespace std;
string Reverse(int n) {//将数字传入反转成字符串返回
    string str = to_string(n);
    string  str1;
    for (int i = str.size() - 1, j = 0; i >= 0 ; --i) {
        str1[j++] = str[i];
    }
    return str1;
}
int main() {
    int a, b;
    while (cin >> a >> b) {
	  //字符串转换成int型
        int ra = stoi(Reverse(a));
        int rb = stoi(Reverse(b));
        int rab = stoi(Reverse(a + b));
	  
        if (ra + rb == rab) {
            cout << a + b << endl;
        } else {
            cout << "NO" << endl;
        }
    }
}