#include <bits/stdc++.h>
using namespace std;
#define int long long
int n, a[500005];
void solve()
{
vector <vector<int>> f(n + 3, vector<int> (n + 3, 0));
vector <vector<int>> dp(n + 3, vector<int> (n + 3, 0));
for (int i = 1; i <= n; i++)
{
f[i][i] = a[i];
for (int j = i + 1; j <= n; j++) f[i][j] = max(f[i][j - 1], a[j]);
}
for (int len = 2; len < n; len++)
for (int i = 1; i + len <= n; i++)
{
int x = i, y = i + len;
dp[x][y] = max({dp[x + 1][y], dp[x][y - 1], a[x] + a[y] + f[x + 1][(x + y)/2]});
}
int q; cin >> q;
while (q--)
{
int l, r; cin >> l >> r;
cout << dp[l][r] << '\n';
}
}
signed main()
{
ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
cin >> n;
for (int i = 1; i <= n; i++) cin >> a[i];
solve();
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
344 KB |
Output is correct |
2 |
Correct |
1 ms |
600 KB |
Output is correct |
3 |
Correct |
0 ms |
604 KB |
Output is correct |
4 |
Correct |
1 ms |
604 KB |
Output is correct |
5 |
Correct |
0 ms |
604 KB |
Output is correct |
6 |
Correct |
1 ms |
600 KB |
Output is correct |
7 |
Correct |
0 ms |
604 KB |
Output is correct |
8 |
Correct |
0 ms |
604 KB |
Output is correct |
9 |
Correct |
1 ms |
604 KB |
Output is correct |
10 |
Correct |
0 ms |
600 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
344 KB |
Output is correct |
2 |
Correct |
1 ms |
600 KB |
Output is correct |
3 |
Correct |
0 ms |
604 KB |
Output is correct |
4 |
Correct |
1 ms |
604 KB |
Output is correct |
5 |
Correct |
0 ms |
604 KB |
Output is correct |
6 |
Correct |
1 ms |
600 KB |
Output is correct |
7 |
Correct |
0 ms |
604 KB |
Output is correct |
8 |
Correct |
0 ms |
604 KB |
Output is correct |
9 |
Correct |
1 ms |
604 KB |
Output is correct |
10 |
Correct |
0 ms |
600 KB |
Output is correct |
11 |
Correct |
453 ms |
402260 KB |
Output is correct |
12 |
Correct |
448 ms |
402256 KB |
Output is correct |
13 |
Correct |
396 ms |
402308 KB |
Output is correct |
14 |
Correct |
476 ms |
402260 KB |
Output is correct |
15 |
Correct |
444 ms |
402296 KB |
Output is correct |
16 |
Correct |
461 ms |
401748 KB |
Output is correct |
17 |
Correct |
489 ms |
401492 KB |
Output is correct |
18 |
Correct |
439 ms |
401488 KB |
Output is correct |
19 |
Correct |
462 ms |
402256 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Runtime error |
226 ms |
524288 KB |
Execution killed with signal 9 |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
344 KB |
Output is correct |
2 |
Correct |
1 ms |
600 KB |
Output is correct |
3 |
Correct |
0 ms |
604 KB |
Output is correct |
4 |
Correct |
1 ms |
604 KB |
Output is correct |
5 |
Correct |
0 ms |
604 KB |
Output is correct |
6 |
Correct |
1 ms |
600 KB |
Output is correct |
7 |
Correct |
0 ms |
604 KB |
Output is correct |
8 |
Correct |
0 ms |
604 KB |
Output is correct |
9 |
Correct |
1 ms |
604 KB |
Output is correct |
10 |
Correct |
0 ms |
600 KB |
Output is correct |
11 |
Correct |
453 ms |
402260 KB |
Output is correct |
12 |
Correct |
448 ms |
402256 KB |
Output is correct |
13 |
Correct |
396 ms |
402308 KB |
Output is correct |
14 |
Correct |
476 ms |
402260 KB |
Output is correct |
15 |
Correct |
444 ms |
402296 KB |
Output is correct |
16 |
Correct |
461 ms |
401748 KB |
Output is correct |
17 |
Correct |
489 ms |
401492 KB |
Output is correct |
18 |
Correct |
439 ms |
401488 KB |
Output is correct |
19 |
Correct |
462 ms |
402256 KB |
Output is correct |
20 |
Runtime error |
226 ms |
524288 KB |
Execution killed with signal 9 |
21 |
Halted |
0 ms |
0 KB |
- |