func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n;     cin >> n;     int s1, s11, s12;     int s2 = 0;     s1 = s11 = s12 = 0;     string s, c;     s = c =   ;     for (int i = 0; i < n; i++) {       int a, b;       cin >> a >> b;       if (i == 0) {         s1 = a;         s2 = 0;         s =  A ;       } else {         if (abs(s1 + a - s2) < abs(s2 + b - s1)) {           s1 += a;           s +=  A ;         } else {           s2 += b;           s +=  G ;         }       }       if (i == 0) {         s11 = 0;         s12 = b;         c =  G ;       } else {         if (abs(s11 + a - s12) < abs(s12 + b - s11)) {           s11 += a;           c +=  A ;         } else {           s12 += b;           c +=  G ;         }       }     }     if (abs(s1 - s2) <= 500) {       cout << s;       return 0;     }     if (abs(s11 - s12) <= 500) {       cout << c;       return 0;     }     cout << -1;     return 0;   }   