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  1. #include <bits/stdc++.h>
  2. #include <ext/pb_ds/assoc_container.hpp>
  3. #include <ext/pb_ds/tree_policy.hpp>
  4. using namespace __gnu_pbds;
  5. using namespace std;
  6. #define pbds tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>; // - Use 'less<T>' for set, 'less_equal<T>' for multiset
  7. #define ll long long int
  8. #define ull unsigned long long
  9. #define endl "\n"
  10.  
  11. int main()
  12. {
  13.  
  14.     ios::sync_with_stdio(false);
  15.     cin.tie(nullptr);
  16.  
  17.     int n;
  18.     cin >> n;
  19.  
  20.     deque<int> v;
  21.     for (int i = 0; i < n; i++)
  22.     {
  23.         int val;
  24.         cin >> val;
  25.         v.push_back(val);
  26.     }
  27.  
  28.     ll ans = 0 ;
  29.  
  30.     for (int i = 0; i < n; i++)
  31.     {
  32.         int cnt = 0;
  33.         if (i == 0)
  34.         {
  35.  
  36.             ll val = v[0];
  37.             if (val < 0)
  38.             {
  39.                 cnt++;
  40.             }
  41.  
  42.             for (int j = 1; j < n; j++)
  43.             {
  44.  
  45.                 val += v[j];
  46.  
  47.                 if (val < 0)
  48.                 {
  49.                     cnt++;
  50.                 }
  51.             }
  52.         }
  53.         else
  54.         {
  55.             v.push_back(v[0]);
  56.             v.pop_front();
  57.  
  58.             ll val = v[0];
  59.             if (val < 0)
  60.             {
  61.                 cnt++;
  62.             }
  63.  
  64.             for (int j = 1; j < n; j++)
  65.             {
  66.  
  67.                 val += v[j];
  68.  
  69.                 if (val < 0)
  70.                 {
  71.                     cnt++;
  72.                 }
  73.             }
  74.         }
  75.  
  76.         if(cnt == 0){
  77.             ans++;
  78.  
  79.         }
  80.     }
  81.     cout << ans ;
  82.  
  83.     return 0;
  84. }
Success #stdin #stdout 0s 5320KB
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https://ideone.com/qavO7Z
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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