Submission #1288514

#	Time	Username	Problem	Language	Result	Execution time	Memory
1288514		LIA	Tricks of the Trade (CEOI23_trade)	C++17	25 / 100	1164 ms	2162688 KiB

trade

#include <bits/stdc++.h>

using namespace std;
#define ll long long
#define vll vector<ll>
#define pll pair<ll, ll>
#define tp tuple<ll, ll, ll>
const ll inf = 1e18;
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(NULL);
  ll n, k, ans = -1e18;
  cin >> n >> k;
  vll b(n), s(n);
  for (ll i = 0; i < n; ++i)
    cin >> b[i];
  for (ll i = 0; i < n; ++i)
    cin >> s[i];

  vector<vll> dp(n + 1, vll(k + 1, -inf));
  for (ll i = 0; i <= n; ++i) dp[i][0] = 0;

  vll pref(n + 1, 0);
  for (ll i = 1; i <= n; ++i) pref[i] = pref[i - 1] + b[i - 1];

  for (ll j = 1; j <= k; ++j) {
    ll best = (j == 1 ? 0 : inf);
    for (ll i = 1; i <= n; ++i) {
      if (best != inf) dp[i][j] = s[i - 1] - pref[i] - best;
      if (dp[i][j - 1] > -inf / 2) best = min(best, -(dp[i][j - 1] + pref[i]));
    }
  }
  for (ll i = 1; i <= n; ++i)
    ans = max(ans, dp[i][k]);

  cout << ans << endl;
}

• Subtask 0: 0 / 0
• Subtask 1: 5 / 10
• Subtask 2: 5 / 10
• Subtask 3: 5 / 10
• Subtask 4: 10 / 25
• Subtask 5: 0 / 45