#include<bits/stdc++.h>
using namespace std;
#define rep(i,n) for(ll i=0; i<(n); i++)
#define rng(i,l,r) for(ll i=(l); i<(r); i++)
#define all(x) x.begin(),x.end()
using ll=long long;
int main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
ll M,L;
cin>>M>>L;
vector<ll> A(M*2+1);
rep(i,M*2+1) {
cin>>A[i];
}
if(L<0) {
L=-L;
rep(i,M) {
swap(A[i],A[M*2-i]);
}
}
const ll mx=600000;
vector<vector<ll>> dp(M+2,vector<ll>(mx+1,-(1LL<<60)));
dp[M+1][0]=0;
for(ll i=M; i>0; i--) {
rep(j,i) {
ll cnt=0;
deque<pair<ll,ll>> deq;
for(ll k=j; k<=mx; k+=i) {
while(!deq.empty()&&deq.front().first<=dp[i+1][k]-cnt) {
deq.pop_front();
}
deq.push_front({dp[i+1][k]-cnt,cnt});
if(deq.back().second<cnt-A[M+i])deq.pop_back();
dp[i][k]=deq.back().first+cnt;
cnt++;
}
}
}
vector<vector<ll>> dp2(M+2,vector<ll>(mx+1,-(1LL<<60)));
dp2[M+1][0]=0;
for(ll i=M; i>0; i--) {
rep(j,i) {
ll cnt=0;
deque<pair<ll,ll>> deq;
for(ll k=j; k<=mx; k+=i) {
while(!deq.empty()&&deq.front().first<=dp2[i+1][k]-cnt) {
deq.pop_front();
}
deq.push_front({dp2[i+1][k]-cnt,cnt});
if(deq.back().second<cnt-A[M-i])deq.pop_back();
dp2[i][k]=deq.back().first+cnt;
cnt++;
}
}
}
ll ans=-(1LL<<60);
rng(i,L,mx) {
ans=max(ans,dp[1][i]+dp2[1][i-L]+A[M]);
}
if(ans<0)cout<<"impossible\n";
else cout<<ans<<"\n";
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
41 ms |
42500 KB |
Output is correct |
2 |
Correct |
48 ms |
52104 KB |
Output is correct |
3 |
Correct |
30 ms |
33296 KB |
Output is correct |
4 |
Correct |
145 ms |
117772 KB |
Output is correct |
5 |
Correct |
742 ms |
493572 KB |
Output is correct |
6 |
Correct |
656 ms |
493568 KB |
Output is correct |
7 |
Correct |
658 ms |
493560 KB |
Output is correct |
8 |
Correct |
627 ms |
493536 KB |
Output is correct |
9 |
Correct |
644 ms |
493560 KB |
Output is correct |
10 |
Correct |
692 ms |
493564 KB |
Output is correct |
11 |
Correct |
691 ms |
493532 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
41 ms |
42500 KB |
Output is correct |
2 |
Correct |
48 ms |
52104 KB |
Output is correct |
3 |
Correct |
30 ms |
33296 KB |
Output is correct |
4 |
Correct |
145 ms |
117772 KB |
Output is correct |
5 |
Correct |
742 ms |
493572 KB |
Output is correct |
6 |
Correct |
656 ms |
493568 KB |
Output is correct |
7 |
Correct |
658 ms |
493560 KB |
Output is correct |
8 |
Correct |
627 ms |
493536 KB |
Output is correct |
9 |
Correct |
644 ms |
493560 KB |
Output is correct |
10 |
Correct |
692 ms |
493564 KB |
Output is correct |
11 |
Correct |
691 ms |
493532 KB |
Output is correct |
12 |
Correct |
29 ms |
42504 KB |
Output is correct |
13 |
Correct |
43 ms |
51992 KB |
Output is correct |
14 |
Correct |
22 ms |
33292 KB |
Output is correct |
15 |
Correct |
132 ms |
117744 KB |
Output is correct |
16 |
Correct |
618 ms |
493564 KB |
Output is correct |
17 |
Correct |
618 ms |
493564 KB |
Output is correct |
18 |
Correct |
665 ms |
493620 KB |
Output is correct |
19 |
Correct |
626 ms |
493564 KB |
Output is correct |
20 |
Correct |
636 ms |
493564 KB |
Output is correct |
21 |
Correct |
689 ms |
493764 KB |
Output is correct |
22 |
Correct |
684 ms |
493572 KB |
Output is correct |
23 |
Runtime error |
684 ms |
524288 KB |
Execution killed with signal 9 |
24 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
133 ms |
117752 KB |
Output is correct |
2 |
Incorrect |
419 ms |
306396 KB |
Output isn't correct |
3 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
133 ms |
117752 KB |
Output is correct |
2 |
Incorrect |
419 ms |
306396 KB |
Output isn't correct |
3 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
133 ms |
117752 KB |
Output is correct |
2 |
Incorrect |
419 ms |
306396 KB |
Output isn't correct |
3 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
41 ms |
42500 KB |
Output is correct |
2 |
Correct |
48 ms |
52104 KB |
Output is correct |
3 |
Correct |
30 ms |
33296 KB |
Output is correct |
4 |
Correct |
145 ms |
117772 KB |
Output is correct |
5 |
Correct |
742 ms |
493572 KB |
Output is correct |
6 |
Correct |
656 ms |
493568 KB |
Output is correct |
7 |
Correct |
658 ms |
493560 KB |
Output is correct |
8 |
Correct |
627 ms |
493536 KB |
Output is correct |
9 |
Correct |
644 ms |
493560 KB |
Output is correct |
10 |
Correct |
692 ms |
493564 KB |
Output is correct |
11 |
Correct |
691 ms |
493532 KB |
Output is correct |
12 |
Correct |
133 ms |
117752 KB |
Output is correct |
13 |
Incorrect |
419 ms |
306396 KB |
Output isn't correct |
14 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
133 ms |
117752 KB |
Output is correct |
2 |
Incorrect |
419 ms |
306396 KB |
Output isn't correct |
3 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
41 ms |
42500 KB |
Output is correct |
2 |
Correct |
48 ms |
52104 KB |
Output is correct |
3 |
Correct |
30 ms |
33296 KB |
Output is correct |
4 |
Correct |
145 ms |
117772 KB |
Output is correct |
5 |
Correct |
742 ms |
493572 KB |
Output is correct |
6 |
Correct |
656 ms |
493568 KB |
Output is correct |
7 |
Correct |
658 ms |
493560 KB |
Output is correct |
8 |
Correct |
627 ms |
493536 KB |
Output is correct |
9 |
Correct |
644 ms |
493560 KB |
Output is correct |
10 |
Correct |
692 ms |
493564 KB |
Output is correct |
11 |
Correct |
691 ms |
493532 KB |
Output is correct |
12 |
Correct |
29 ms |
42504 KB |
Output is correct |
13 |
Correct |
43 ms |
51992 KB |
Output is correct |
14 |
Correct |
22 ms |
33292 KB |
Output is correct |
15 |
Correct |
132 ms |
117744 KB |
Output is correct |
16 |
Correct |
618 ms |
493564 KB |
Output is correct |
17 |
Correct |
618 ms |
493564 KB |
Output is correct |
18 |
Correct |
665 ms |
493620 KB |
Output is correct |
19 |
Correct |
626 ms |
493564 KB |
Output is correct |
20 |
Correct |
636 ms |
493564 KB |
Output is correct |
21 |
Correct |
689 ms |
493764 KB |
Output is correct |
22 |
Correct |
684 ms |
493572 KB |
Output is correct |
23 |
Runtime error |
684 ms |
524288 KB |
Execution killed with signal 9 |
24 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
133 ms |
117752 KB |
Output is correct |
2 |
Incorrect |
419 ms |
306396 KB |
Output isn't correct |
3 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
41 ms |
42500 KB |
Output is correct |
2 |
Correct |
48 ms |
52104 KB |
Output is correct |
3 |
Correct |
30 ms |
33296 KB |
Output is correct |
4 |
Correct |
145 ms |
117772 KB |
Output is correct |
5 |
Correct |
742 ms |
493572 KB |
Output is correct |
6 |
Correct |
656 ms |
493568 KB |
Output is correct |
7 |
Correct |
658 ms |
493560 KB |
Output is correct |
8 |
Correct |
627 ms |
493536 KB |
Output is correct |
9 |
Correct |
644 ms |
493560 KB |
Output is correct |
10 |
Correct |
692 ms |
493564 KB |
Output is correct |
11 |
Correct |
691 ms |
493532 KB |
Output is correct |
12 |
Correct |
29 ms |
42504 KB |
Output is correct |
13 |
Correct |
43 ms |
51992 KB |
Output is correct |
14 |
Correct |
22 ms |
33292 KB |
Output is correct |
15 |
Correct |
132 ms |
117744 KB |
Output is correct |
16 |
Correct |
618 ms |
493564 KB |
Output is correct |
17 |
Correct |
618 ms |
493564 KB |
Output is correct |
18 |
Correct |
665 ms |
493620 KB |
Output is correct |
19 |
Correct |
626 ms |
493564 KB |
Output is correct |
20 |
Correct |
636 ms |
493564 KB |
Output is correct |
21 |
Correct |
689 ms |
493764 KB |
Output is correct |
22 |
Correct |
684 ms |
493572 KB |
Output is correct |
23 |
Runtime error |
684 ms |
524288 KB |
Execution killed with signal 9 |
24 |
Halted |
0 ms |
0 KB |
- |