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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. using ll = long long;
  5.  
  6. int main() {
  7.     ios::sync_with_stdio(false);
  8.     cin.tie(nullptr);
  9.  
  10.     int n;
  11.     cin >> n;
  12.  
  13.     vector<ll> arr(n + 1);
  14.     for (int i = 1; i <= n; ++i) {
  15.         cin >> arr[i];
  16.     }
  17.  
  18.     const ll INF = (ll)4e18;
  19.     const int MAX_SUM = 100;
  20.  
  21.     vector<vector<ll>> dp(n + 1, vector<ll>(MAX_SUM + 1, INF));
  22.  
  23.     dp[0][0] = 0;
  24.  
  25.     for (int right = 1; right <= n; ++right) {
  26.         ll segmentSum = 0;
  27.  
  28.         for (int left = right; left >= 1; --left) {
  29.             segmentSum += arr[left];
  30.  
  31.             int len = right - left;
  32.  
  33.             for (int prevSum = 0; prevSum <= segmentSum; ++prevSum) {
  34.                 if (dp[left - 1][prevSum] == INF)
  35.                     continue;
  36.  
  37.                 dp[right][segmentSum] =
  38.                     min(dp[right][segmentSum],
  39.                         dp[left - 1][prevSum] + len);
  40.             }
  41.         }
  42.     }
  43.  
  44.     ll result = INF;
  45.  
  46.     for (int s = 1; s <= MAX_SUM; ++s) {
  47.         result = min(result, dp[n][s]);
  48.     }
  49.  
  50.     cout << result << '\n';
  51.  
  52.     return 0;
  53. }
Success #stdin #stdout 0s 5312KB
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https://ideone.com/8eu8Vw
language:
C++ (gcc 8.3)
created:
20 hours ago
visibility:
public

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