func_code_string: #include <bits/stdc++.h>   using namespace std;   long long a, b;   long long remove(long long a) {     long long temp = 0L;     int tens = 1;     while (a) {       if (a % 10) {         temp += tens * (a % 10);         tens *= 10;       }       a /= 10;     }     return temp;   }   int main() {     cin >> a >> b;     long long c = a + b;     a = remove(a);     b = remove(b);     c = remove(c);     if (a + b == c)       cout <<  YES ;     else       cout <<  NO ;   }   