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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3.  
  4. long long n, m, a[100005], pref[100005], b[102];
  5.  
  6. int main()
  7. {
  8.     ios_base::sync_with_stdio(0);
  9.     cin.tie(0); cout.tie(0);
  10.  
  11.     freopen("CHUNGKHOAN.INP", "r", stdin);
  12.     freopen("CHUNGKHOAN.OUT", "w", stdout);
  13.  
  14.     cin >> n >> m;
  15.  
  16.     for (int i = 1; i <= n; ++i) {
  17.         cin >> a[i];
  18.         pref[i] = pref[i - 1] + a[i];
  19.     }
  20.  
  21.     for (int i = 1; i <= m; ++i) {
  22.         cin >> b[i];
  23.     }
  24.  
  25.     vector<long long> prev_dp(n + 1, 0);
  26.     vector<long long> dp(n + 1, 0);
  27.  
  28.     for (int j = 1; j <= m; ++j) {
  29.         for (int i = 1; i <= n; ++i) {
  30.             dp[i] = dp[i - 1];
  31.             dp[i] = max(dp[i], prev_dp[i]);
  32.  
  33.             if (i >= b[j]) {
  34.                 long long sum_segment = pref[i] - pref[i - b[j]];
  35.                 dp[i] = max(dp[i], prev_dp[i - b[j]] + sum_segment);
  36.             }
  37.         }
  38.         prev_dp = dp;
  39.     }
  40.  
  41.     cout << dp[n];
  42.  
  43.     return 0;
  44. }
  45.  
Success #stdin #stdout 0s 5312KB
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https://ideone.com/6LiIkf
language:
C++14 (gcc 8.3)
created:
47 minutes ago
visibility:
public

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