#include <bits/stdc++.h>
#define int long long
#define all(x) x.begin(),x.end()
#define ff first
#define ss second
#define pb push_back
using namespace std;
int ans[5005][5005];
signed main(){
ios_base::sync_with_stdio(0);
cin.tie(0);cout.tie(0);
int n;
cin>>n;
vector <int> a(n);
for(int i=0;i<n;i++){
cin>>a[i];
}
for(int i=0;i<n-2;i++){
int mx=a[i+1];
vector <int> v;v.pb(a[i+1]);
for(int j=i+2;j<n;j++){
int sum=a[j]+a[i];
mx=max(mx,a[j]);
v.pb(mx);
ans[i][j]=sum+v[v.size()/2-1];
}
}
for(int i=0;i<n;i++){
int pr=0;
for(int j=0;j<n;j++){
ans[i][j]=max(ans[i][j],pr);
pr=ans[i][j];
}
}
for(int j=0;j<n;j++){
int pr=0;
for(int i=n-1;i>=0;i--){
ans[i][j]=max(ans[i][j],pr);
pr=ans[i][j];
}
}
int q;
cin>>q;
while(q--){
int l,r;
cin>>l>>r;
l--;r--;
cout<<ans[l][r]<<"\n";
}
}
/*
5
5 2 1 5 3
3
1 4
2 5
1 5
*/
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Correct |
1 ms |
4444 KB |
Output is correct |
3 |
Correct |
1 ms |
4444 KB |
Output is correct |
4 |
Correct |
1 ms |
4444 KB |
Output is correct |
5 |
Correct |
1 ms |
4444 KB |
Output is correct |
6 |
Correct |
1 ms |
4444 KB |
Output is correct |
7 |
Correct |
1 ms |
4444 KB |
Output is correct |
8 |
Correct |
1 ms |
4444 KB |
Output is correct |
9 |
Correct |
1 ms |
4444 KB |
Output is correct |
10 |
Correct |
1 ms |
4444 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Correct |
1 ms |
4444 KB |
Output is correct |
3 |
Correct |
1 ms |
4444 KB |
Output is correct |
4 |
Correct |
1 ms |
4444 KB |
Output is correct |
5 |
Correct |
1 ms |
4444 KB |
Output is correct |
6 |
Correct |
1 ms |
4444 KB |
Output is correct |
7 |
Correct |
1 ms |
4444 KB |
Output is correct |
8 |
Correct |
1 ms |
4444 KB |
Output is correct |
9 |
Correct |
1 ms |
4444 KB |
Output is correct |
10 |
Correct |
1 ms |
4444 KB |
Output is correct |
11 |
Correct |
427 ms |
201408 KB |
Output is correct |
12 |
Correct |
423 ms |
201292 KB |
Output is correct |
13 |
Correct |
428 ms |
201300 KB |
Output is correct |
14 |
Correct |
424 ms |
201424 KB |
Output is correct |
15 |
Correct |
443 ms |
201300 KB |
Output is correct |
16 |
Correct |
435 ms |
200756 KB |
Output is correct |
17 |
Correct |
434 ms |
200788 KB |
Output is correct |
18 |
Correct |
448 ms |
200784 KB |
Output is correct |
19 |
Correct |
448 ms |
201300 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Execution timed out |
4065 ms |
86952 KB |
Time limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Correct |
1 ms |
4444 KB |
Output is correct |
3 |
Correct |
1 ms |
4444 KB |
Output is correct |
4 |
Correct |
1 ms |
4444 KB |
Output is correct |
5 |
Correct |
1 ms |
4444 KB |
Output is correct |
6 |
Correct |
1 ms |
4444 KB |
Output is correct |
7 |
Correct |
1 ms |
4444 KB |
Output is correct |
8 |
Correct |
1 ms |
4444 KB |
Output is correct |
9 |
Correct |
1 ms |
4444 KB |
Output is correct |
10 |
Correct |
1 ms |
4444 KB |
Output is correct |
11 |
Correct |
427 ms |
201408 KB |
Output is correct |
12 |
Correct |
423 ms |
201292 KB |
Output is correct |
13 |
Correct |
428 ms |
201300 KB |
Output is correct |
14 |
Correct |
424 ms |
201424 KB |
Output is correct |
15 |
Correct |
443 ms |
201300 KB |
Output is correct |
16 |
Correct |
435 ms |
200756 KB |
Output is correct |
17 |
Correct |
434 ms |
200788 KB |
Output is correct |
18 |
Correct |
448 ms |
200784 KB |
Output is correct |
19 |
Correct |
448 ms |
201300 KB |
Output is correct |
20 |
Execution timed out |
4065 ms |
86952 KB |
Time limit exceeded |
21 |
Halted |
0 ms |
0 KB |
- |