func_code_string: #include <bits/stdc++.h>   using namespace std;   void fast() {     std::ios_base::sync_with_stdio(0);     cin.tie(NULL);     cout.tie(NULL);     cerr.tie(NULL);   }   int main() {     fast();     unsigned long long over = pow(2, 32);     string s;     int i;     unsigned long long num = 0;     stack<unsigned long long> loop;     loop.push(1);     int n;     cin >> n;     while (n--) {       cin >> s;       if (s ==  add ) {         num += loop.top();         if (num >= over) {           cout <<  OVERFLOW!!! ;           return 0;         }       } else if (s ==  for ) {         cin >> i;         loop.push(min(over, loop.top() * i));       } else {         loop.pop();       }     }     cout << num;     return 0;   }   