Submission #515477

#	Time	Username	Problem	Language	Result	Execution time	Memory
515477		79brue	Triple Jump (JOI19_jumps)	C++14	19 / 100	2359 ms	401440 KiB

jumps

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

int n, q;
int arr[500002];
int DP[5002][5002];
int DPmax[5002][5002];

int main(){
    scanf("%d", &n);
    for(int i=1; i<=n; i++) scanf("%d", &arr[i]);
    for(int i=1; i<=n; i++){
        DPmax[i][i] = arr[i];
        for(int j=i+1; j<=n; j++){
            DPmax[i][j] = max(DPmax[i][j-1], arr[j]);
        }
    }
    for(int i=1; i<=n-2; i++) DP[i][i+2] = arr[i] + arr[i+1] + arr[i+2];
    for(int d=3; d<n; d++){
        for(int i=1; i+d<=n; i++){
            int j = i+d;
            DP[i][j] = max({DP[i][j-1], DP[i+1][j], arr[i] + arr[j] + DPmax[i+1][(i+j)/2]});
        }
    }

    scanf("%d", &q);
    while(q--){
        int l, r;
        scanf("%d %d", &l, &r);
        printf("%d\n", DP[l][r]);
    }
}

Compilation message (stderr)

jumps.cpp: In function 'int main()':
jumps.cpp:13:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |     scanf("%d", &n);
      |     ~~~~~^~~~~~~~~~
jumps.cpp:14:34: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 |     for(int i=1; i<=n; i++) scanf("%d", &arr[i]);
      |                             ~~~~~^~~~~~~~~~~~~~~
jumps.cpp:29:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   29 |     scanf("%d", &q);
      |     ~~~~~^~~~~~~~~~
jumps.cpp:32:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   32 |         scanf("%d %d", &l, &r);
      |         ~~~~~^~~~~~~~~~~~~~~~~

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