#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
#define ff first
#define ss second
ll ttt;
const ll INF=1e18;
const ll MOD=1e9+7;
const ll N=5007;
ll n,m,k;
ll dp[N][N]; // l-ic r vor vercnenq maqsimumy
ll pf[N][N]; // l-ic enq sksum, kamayakan r'-i hamar minchev r
ll res[N][N]; // kamayakan l'-ic kamayakan r'
ll a[N];
int 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];
}
ll ans=0;
for(int l=n;l>=1;l--){
for(int r=l+2;r<=n;r++){
int mid=(l+r)/2;
dp[l][r]=max(dp[l][r-1],a[l]+a[r]+a[mid]);
pf[l][r]=max(pf[l][r-1],dp[l][r]);
res[l][r]=max(res[l+1][r],pf[l][r]);
ans=max(ans,res[l][r]);
}
}
cin>>m;
for(int i=0;i<m;i++){
int l,r;
cin>>l>>r;
cout<<res[l][r]<<endl;
}
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
340 KB |
Output is correct |
2 |
Incorrect |
2 ms |
1620 KB |
Output isn't correct |
3 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
340 KB |
Output is correct |
2 |
Incorrect |
2 ms |
1620 KB |
Output isn't correct |
3 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Runtime error |
24 ms |
3540 KB |
Execution killed with signal 11 |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
340 KB |
Output is correct |
2 |
Incorrect |
2 ms |
1620 KB |
Output isn't correct |
3 |
Halted |
0 ms |
0 KB |
- |