#include <bits/stdc++.h>
using namespace std;
#define all(x) x.begin(), x.end()
#define ar array
#define pb push_back
#define ln '\n'
#define int long long
using i64 = long long;
template <class F, class _S>
bool chmin(F &u, const _S &v){
bool flag = false;
if ( u > v ){
u = v; flag |= true;
}
return flag;
}
template <class F, class _S>
bool chmax(F &u, const _S &v){
bool flag = false;
if ( u < v ){
u = v; flag |= true;
}
return flag;
}
signed main(){
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
int n; cin >> n;
vector <int> a(n + 1);
for ( int i = 1; i <= n; i++ ){
cin >> a[i];
}
vector <vector<int>> dp(n + 2, vector <int> (n + 2));
for ( int i = n - 2; i > 0; i-- ){
int k = i + 1, mx = 0;
for ( int j = i + 2; j <= n; j++ ){
dp[i][j] = max(dp[i + 1][j], dp[i][j - 1]);
while ( k < j && k - i <= j - k ){
chmax(mx, a[k]);
k++;
}
chmax(dp[i][j], mx + a[i] + a[j]);
}
}
int q; cin >> q;
while ( q-- ){
int l, r; cin >> l >> r;
cout << dp[l][r] << ln;
}
cout << '\n';
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
1 ms |
348 KB |
Output is correct |
4 |
Correct |
1 ms |
348 KB |
Output is correct |
5 |
Correct |
0 ms |
348 KB |
Output is correct |
6 |
Correct |
0 ms |
392 KB |
Output is correct |
7 |
Correct |
1 ms |
344 KB |
Output is correct |
8 |
Correct |
1 ms |
348 KB |
Output is correct |
9 |
Correct |
0 ms |
348 KB |
Output is correct |
10 |
Correct |
0 ms |
348 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
1 ms |
348 KB |
Output is correct |
4 |
Correct |
1 ms |
348 KB |
Output is correct |
5 |
Correct |
0 ms |
348 KB |
Output is correct |
6 |
Correct |
0 ms |
392 KB |
Output is correct |
7 |
Correct |
1 ms |
344 KB |
Output is correct |
8 |
Correct |
1 ms |
348 KB |
Output is correct |
9 |
Correct |
0 ms |
348 KB |
Output is correct |
10 |
Correct |
0 ms |
348 KB |
Output is correct |
11 |
Correct |
246 ms |
201536 KB |
Output is correct |
12 |
Correct |
236 ms |
201296 KB |
Output is correct |
13 |
Correct |
243 ms |
201496 KB |
Output is correct |
14 |
Correct |
230 ms |
201424 KB |
Output is correct |
15 |
Correct |
208 ms |
201552 KB |
Output is correct |
16 |
Correct |
208 ms |
200896 KB |
Output is correct |
17 |
Correct |
222 ms |
200788 KB |
Output is correct |
18 |
Correct |
236 ms |
200788 KB |
Output is correct |
19 |
Correct |
229 ms |
201240 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Runtime error |
203 ms |
524288 KB |
Execution killed with signal 9 |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
1 ms |
348 KB |
Output is correct |
4 |
Correct |
1 ms |
348 KB |
Output is correct |
5 |
Correct |
0 ms |
348 KB |
Output is correct |
6 |
Correct |
0 ms |
392 KB |
Output is correct |
7 |
Correct |
1 ms |
344 KB |
Output is correct |
8 |
Correct |
1 ms |
348 KB |
Output is correct |
9 |
Correct |
0 ms |
348 KB |
Output is correct |
10 |
Correct |
0 ms |
348 KB |
Output is correct |
11 |
Correct |
246 ms |
201536 KB |
Output is correct |
12 |
Correct |
236 ms |
201296 KB |
Output is correct |
13 |
Correct |
243 ms |
201496 KB |
Output is correct |
14 |
Correct |
230 ms |
201424 KB |
Output is correct |
15 |
Correct |
208 ms |
201552 KB |
Output is correct |
16 |
Correct |
208 ms |
200896 KB |
Output is correct |
17 |
Correct |
222 ms |
200788 KB |
Output is correct |
18 |
Correct |
236 ms |
200788 KB |
Output is correct |
19 |
Correct |
229 ms |
201240 KB |
Output is correct |
20 |
Runtime error |
203 ms |
524288 KB |
Execution killed with signal 9 |
21 |
Halted |
0 ms |
0 KB |
- |