Submission #433786

#	Time	Username	Problem	Language	Result	Execution time	Memory
433786		dxz05	Triple Jump (JOI19_jumps)	C++14	19 / 100	4050 ms	204384 KiB

jumps

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
const int N = 5050;

#define MP make_pair
mt19937 rng(chrono::high_resolution_clock::now().time_since_epoch().count());

int mx[N][N], ans[N][N];
int a[N];

void solve(){
    int n;
    cin >> n;

    for (int i = 1; i <= n; i++){
        cin >> a[i];
    }

    for (int l = 1; l <= n; l++){
        for (int r = l; r <= n; r++){
            mx[l][r] = max(mx[l][r - 1], a[r]);
        }
    }

    for (int i = 1; i <= n; i++){
        for (int j = i + 2; j <= n; j++){
            int k = (i + j) / 2;
            ans[i][j] = a[i] + a[j] + mx[i + 1][k];
        }
    }

    for (int i = n; i >= 1; i--){
        for (int j = i; j <= n; j++){
            ans[i][j] = max({ans[i][j], ans[i + 1][j], ans[i][j - 1]});
        }
    }

    int q;
    cin >> q;

    while (q--){
        int l, r;
        cin >> l >> r;
        cout << ans[l][r] << endl;
    }

}

int main(){
    ios_base::sync_with_stdio(false);
    //freopen("output.txt", "w", stdout);
    int tests = 1;
   // cin >> tests;

    while (tests--){
        solve();
    }

    return 0;
}

• Subtask 1: 5 / 5
• Subtask 2: 14 / 14
• Subtask 3: 0 / 27
• Subtask 4: 0 / 54