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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. using ll = long long;
  5.  
  6. #define rep(i, l, r) for(ll i = l; i <= r; i++)
  7.  
  8. ll N, S;
  9. ll A[2020], pf[2020];
  10.  
  11. int main(int argc, const char * argv[]) {
  12.     N = 1818;
  13.  
  14.     rep(i, 1, N){
  15.         S = 0;
  16.         rep(j, 1, N) { cin >> A[j]; S += A[j] * j; pf[j] = A[j] + pf[j-1]; }
  17.  
  18.         ll ans = S;
  19.         rep(j, 0, N){
  20.             if( j ) ans = min(ans, S);
  21.             S = S - (pf[N] - pf[j]) + pf[j];
  22.         }
  23.  
  24.         cout << ans << '\n';
  25.     }
  26.  
  27.     return 0;
  28. }
Success #stdin #stdout 0.05s 5280KB
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https://ideone.com/hZpBYb
language:
C++14 (gcc 8.3)
created:
13 days ago
visibility:
public

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