func_code_string: #include <bits/stdc++.h>   using namespace std;   long long p = 1000000007ll;   int main(void) {     long long n;     cin >> n;     vector<pair<long long, long long> > loops;     long long tmp = 0;     for (long long i = (0); i < (n); ++i) {       string com;       cin >> com;       if (com ==  for ) {         long long x;         cin >> x;         loops.emplace_back(x, tmp);         tmp = 0;       } else if (com ==  end ) {         tmp = tmp * loops.back().first + loops.back().second;         if (tmp >= (1ll << 32)) {           cout <<  OVERFLOW!!!  << endl;           return 0;         }         loops.pop_back();       } else {         ++tmp;       }     }     if (tmp >= (1ll << 32)) {       cout <<  OVERFLOW!!!  << endl;       return 0;     }     cout << tmp << endl;     return 0;   }   