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  1. #define _CRT_SECURE_NO_WARNINGS
  2. #include<bits/stdc++.h>
  3. typedef long long ll;
  4. using namespace std;
  5. const int N = 1e4 + 5;
  6. void FASTCODE() {
  7.     std::ios_base::sync_with_stdio(0);
  8.     cin.tie(NULL);
  9.     cout.tie(NULL);
  10. }
  11. void File() {
  12.     //freopen("input.txt", "r", stdin);
  13.     //freopen("output.txt", "w", stdout);
  14. }
  15. void solution() {
  16.     int l;
  17.     cin >> l;
  18.     ll sum = 0, ans = 1;
  19.     ll x;
  20.     ll v = 0;
  21.     ll c = pow(2, 32) - 1;
  22.     stack<ll>st;
  23.     bool b = 1;
  24.     st.push(1);
  25.     while (l--) {
  26.         string s;
  27.         cin >> s;
  28.         if (s == "for") {
  29.             cin >> x;
  30.             ans *= x;
  31.             //cout << ans << "\n";
  32.             st.push(ans);
  33.         }
  34.         else if (s == "add") {
  35.             // cout << ans << "\n";
  36.             if (ans<0 && ans>c) {
  37.                 b = 0;
  38.             }
  39.                 sum += ans;
  40.                 if (sum<0 && sum>c) {
  41.                     b = 0;
  42.                 }
  43.         }
  44.         else if (s == "end" && ans > 1) {
  45.             if (!st.empty()) {
  46.                 st.pop();
  47.                 ans = st.top();
  48.             }
  49.         }
  50.         //   cout << "ans: "<<ans << " "<< "sum: "<< sum << "\n";
  51.     }
  52.     if (sum >= 0 && sum <= c && ans == 1 && b) {
  53.         cout << sum;
  54.     }
  55.     else {
  56.         cout << "OVERFLOW!!!";
  57.     }
  58. }
  59. int main() {
  60.     FASTCODE();
  61.     File();
  62.     solution();
  63.     return 0;
  64. }
Success #stdin #stdout 0.01s 5464KB
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https://ideone.com/1cg6ac
language:
C++ (gcc 8.3)
created:
1 year ago
visibility:
public

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