Submission #1309103

#	Time	Username	Problem	Language	Result	Execution time	Memory
1309103		lyra_g13	Feast (NOI19_feast)	C++20	0 / 100	149 ms	327680 KiB

feast

#include <bits/stdc++.h>
using ll = int;
using namespace std;

int main() {
  std::ios_base::sync_with_stdio(false);
  std::cin.tie(nullptr);

  ll n, k;
  cin >> n >> k;

  vector<ll> a(n);
  vector<ll> pref(n + 1);
  vector<vector<ll>> dp(k + 1, vector<ll>(n + 1));
  for (int i = 0; i < n; i++) {
    cin >> a[i];
  }
  for (int i = 1; i <= n; i++) {
    pref[i] = pref[i - 1] + a[i - 1];
  }

  for (int j = 1; j <= k; j++) {
    ll best = -1e18;

    for (int i = 1; i <= n; i++) {

      best = max(best, dp[j - 1][i - 1] - pref[i - 1]);

      dp[j][i] = best + pref[i];
      dp[j][i] = max(dp[j][i - 1], dp[j][i]);
      if(dp[j][i] < 0) dp[j][i] = 0;
    }
  }
  cout << dp[k][n] << "\n";
  return 0;
}

Compilation message (stderr)

feast.cpp: In function 'int main()':
feast.cpp:23:15: warning: overflow in conversion from 'double' to 'll' {aka 'int'} changes value from '-1.0e+18' to '-2147483648' [-Woverflow]
   23 |     ll best = -1e18;
      |               ^~~~~

• Subtask 1: 0 / 4
• Subtask 2: 0 / 8
• Subtask 3: 0 / 18
• Subtask 4: 0 / 10
• Subtask 5: 0 / 11
• Subtask 6: 0 / 20
• Subtask 7: 0 / 29