#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
int main() {
ios_base::sync_with_stdio(false); cin.tie(0); cout.setf(ios::fixed); cout.precision(20);
#ifdef LOCAL
freopen("input.txt", "r", stdin);
freopen("output.txt", "w", stdout);
#endif
int n;
cin >> n;
vector <int> A(n);
for (int i = 0; i < n; ++i) cin >> A[i];
vector <vector <int>> mx(n, vector <int> (n));
for (int l = 0; l < n; ++l) {
for (int r = 0; r < n; ++r) {
if (r > l) mx[l][r] = max(mx[l][r - 1], A[r]);
else mx[l][r] = A[r];
}
}
vector <vector <int>> dp(n, vector <int> (n));
for (int len = 3; len <= n; ++len) {
for (int l = 0; l + len <= n; ++l) {
int r = l + len - 1;
dp[l][r] = max(dp[l + 1][r], dp[l][r - 1]);
int m = (l + r) >> 1;
dp[l][r] = max(dp[l][r], A[l] + A[r] + mx[l + 1][m]);
}
}
int q;
cin >> q;
while (q--) {
int l, r;
cin >> l >> r;
--l, --r;
cout << dp[l][r] << '\n';
}
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
376 KB |
Output is correct |
2 |
Correct |
2 ms |
376 KB |
Output is correct |
3 |
Correct |
2 ms |
504 KB |
Output is correct |
4 |
Correct |
2 ms |
376 KB |
Output is correct |
5 |
Correct |
2 ms |
376 KB |
Output is correct |
6 |
Correct |
2 ms |
376 KB |
Output is correct |
7 |
Correct |
2 ms |
376 KB |
Output is correct |
8 |
Correct |
2 ms |
408 KB |
Output is correct |
9 |
Correct |
2 ms |
376 KB |
Output is correct |
10 |
Correct |
2 ms |
376 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
376 KB |
Output is correct |
2 |
Correct |
2 ms |
376 KB |
Output is correct |
3 |
Correct |
2 ms |
504 KB |
Output is correct |
4 |
Correct |
2 ms |
376 KB |
Output is correct |
5 |
Correct |
2 ms |
376 KB |
Output is correct |
6 |
Correct |
2 ms |
376 KB |
Output is correct |
7 |
Correct |
2 ms |
376 KB |
Output is correct |
8 |
Correct |
2 ms |
408 KB |
Output is correct |
9 |
Correct |
2 ms |
376 KB |
Output is correct |
10 |
Correct |
2 ms |
376 KB |
Output is correct |
11 |
Correct |
839 ms |
206108 KB |
Output is correct |
12 |
Correct |
844 ms |
206200 KB |
Output is correct |
13 |
Correct |
837 ms |
206248 KB |
Output is correct |
14 |
Correct |
838 ms |
206200 KB |
Output is correct |
15 |
Correct |
842 ms |
206300 KB |
Output is correct |
16 |
Correct |
860 ms |
205560 KB |
Output is correct |
17 |
Correct |
859 ms |
205572 KB |
Output is correct |
18 |
Correct |
870 ms |
205516 KB |
Output is correct |
19 |
Correct |
835 ms |
206032 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Runtime error |
455 ms |
524288 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
376 KB |
Output is correct |
2 |
Correct |
2 ms |
376 KB |
Output is correct |
3 |
Correct |
2 ms |
504 KB |
Output is correct |
4 |
Correct |
2 ms |
376 KB |
Output is correct |
5 |
Correct |
2 ms |
376 KB |
Output is correct |
6 |
Correct |
2 ms |
376 KB |
Output is correct |
7 |
Correct |
2 ms |
376 KB |
Output is correct |
8 |
Correct |
2 ms |
408 KB |
Output is correct |
9 |
Correct |
2 ms |
376 KB |
Output is correct |
10 |
Correct |
2 ms |
376 KB |
Output is correct |
11 |
Correct |
839 ms |
206108 KB |
Output is correct |
12 |
Correct |
844 ms |
206200 KB |
Output is correct |
13 |
Correct |
837 ms |
206248 KB |
Output is correct |
14 |
Correct |
838 ms |
206200 KB |
Output is correct |
15 |
Correct |
842 ms |
206300 KB |
Output is correct |
16 |
Correct |
860 ms |
205560 KB |
Output is correct |
17 |
Correct |
859 ms |
205572 KB |
Output is correct |
18 |
Correct |
870 ms |
205516 KB |
Output is correct |
19 |
Correct |
835 ms |
206032 KB |
Output is correct |
20 |
Runtime error |
455 ms |
524288 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
21 |
Halted |
0 ms |
0 KB |
- |