#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int MAX = 50*100*101;
const int INF = 1e8;
int main(){
cin.tie(0);
ios_base::sync_with_stdio(false);
int M; ll L;
cin >> M >> L;
vector<int> a(2*M+1);
for(int i = 0; i < 2*M+1; ++i) cin >> a[i];
if(L > MAX || L < -MAX){
cout << "impossible\n";
return 0;
}
vector<int> dp(2*MAX+1, -INF);
dp[MAX] = 0;
for(int i = 0; i < 2*M+1; ++i){
if(i == M){
for(int j = 0; j < 2*MAX+1; ++j) dp[j] += a[M];
continue;
}
int v = i-M;
int start = 0;
if(v < 0) start = 2*MAX+1+v;
for(int j = start; j < start + abs(v); ++j){
deque<pair<int, int>> q;
for(int k = 0; j+v*k >= 0 && j+v*k < 2*MAX+1; ++k){
int x = dp[j+v*k]-k;
while(!q.empty() && x > q.back().first) q.pop_back();
q.emplace_back(x, k);
if(k - q.front().second > a[i]) q.pop_front();
dp[j+v*k] = q.front().first + k;
}
}
}
if(dp[MAX+L] < 0) cout << "impossible\n";
else cout << dp[MAX+L] << "\n";
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
24 ms |
4180 KB |
Output is correct |
2 |
Correct |
37 ms |
4180 KB |
Output is correct |
3 |
Correct |
14 ms |
4180 KB |
Output is correct |
4 |
Correct |
121 ms |
4180 KB |
Output is correct |
5 |
Correct |
0 ms |
212 KB |
Output is correct |
6 |
Correct |
599 ms |
4180 KB |
Output is correct |
7 |
Correct |
593 ms |
4180 KB |
Output is correct |
8 |
Correct |
627 ms |
4180 KB |
Output is correct |
9 |
Correct |
613 ms |
4180 KB |
Output is correct |
10 |
Correct |
596 ms |
4180 KB |
Output is correct |
11 |
Correct |
586 ms |
4180 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
24 ms |
4180 KB |
Output is correct |
2 |
Correct |
37 ms |
4180 KB |
Output is correct |
3 |
Correct |
14 ms |
4180 KB |
Output is correct |
4 |
Correct |
121 ms |
4180 KB |
Output is correct |
5 |
Correct |
0 ms |
212 KB |
Output is correct |
6 |
Correct |
599 ms |
4180 KB |
Output is correct |
7 |
Correct |
593 ms |
4180 KB |
Output is correct |
8 |
Correct |
627 ms |
4180 KB |
Output is correct |
9 |
Correct |
613 ms |
4180 KB |
Output is correct |
10 |
Correct |
596 ms |
4180 KB |
Output is correct |
11 |
Correct |
586 ms |
4180 KB |
Output is correct |
12 |
Correct |
25 ms |
4180 KB |
Output is correct |
13 |
Correct |
36 ms |
4180 KB |
Output is correct |
14 |
Correct |
15 ms |
4180 KB |
Output is correct |
15 |
Correct |
119 ms |
4180 KB |
Output is correct |
16 |
Correct |
0 ms |
212 KB |
Output is correct |
17 |
Correct |
607 ms |
4180 KB |
Output is correct |
18 |
Correct |
605 ms |
4180 KB |
Output is correct |
19 |
Correct |
610 ms |
4180 KB |
Output is correct |
20 |
Correct |
617 ms |
4180 KB |
Output is correct |
21 |
Correct |
582 ms |
4180 KB |
Output is correct |
22 |
Correct |
584 ms |
4180 KB |
Output is correct |
23 |
Correct |
1 ms |
212 KB |
Output is correct |
24 |
Correct |
1253 ms |
4180 KB |
Output is correct |
25 |
Correct |
1207 ms |
4180 KB |
Output is correct |
26 |
Correct |
1237 ms |
4180 KB |
Output is correct |
27 |
Correct |
1228 ms |
4180 KB |
Output is correct |
28 |
Correct |
1206 ms |
4180 KB |
Output is correct |
29 |
Correct |
1194 ms |
4260 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
117 ms |
4280 KB |
Output is correct |
2 |
Incorrect |
0 ms |
212 KB |
Output isn't correct |
3 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
117 ms |
4280 KB |
Output is correct |
2 |
Incorrect |
0 ms |
212 KB |
Output isn't correct |
3 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
117 ms |
4280 KB |
Output is correct |
2 |
Incorrect |
0 ms |
212 KB |
Output isn't correct |
3 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
24 ms |
4180 KB |
Output is correct |
2 |
Correct |
37 ms |
4180 KB |
Output is correct |
3 |
Correct |
14 ms |
4180 KB |
Output is correct |
4 |
Correct |
121 ms |
4180 KB |
Output is correct |
5 |
Correct |
0 ms |
212 KB |
Output is correct |
6 |
Correct |
599 ms |
4180 KB |
Output is correct |
7 |
Correct |
593 ms |
4180 KB |
Output is correct |
8 |
Correct |
627 ms |
4180 KB |
Output is correct |
9 |
Correct |
613 ms |
4180 KB |
Output is correct |
10 |
Correct |
596 ms |
4180 KB |
Output is correct |
11 |
Correct |
586 ms |
4180 KB |
Output is correct |
12 |
Correct |
117 ms |
4280 KB |
Output is correct |
13 |
Incorrect |
0 ms |
212 KB |
Output isn't correct |
14 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
117 ms |
4280 KB |
Output is correct |
2 |
Incorrect |
0 ms |
212 KB |
Output isn't correct |
3 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
24 ms |
4180 KB |
Output is correct |
2 |
Correct |
37 ms |
4180 KB |
Output is correct |
3 |
Correct |
14 ms |
4180 KB |
Output is correct |
4 |
Correct |
121 ms |
4180 KB |
Output is correct |
5 |
Correct |
0 ms |
212 KB |
Output is correct |
6 |
Correct |
599 ms |
4180 KB |
Output is correct |
7 |
Correct |
593 ms |
4180 KB |
Output is correct |
8 |
Correct |
627 ms |
4180 KB |
Output is correct |
9 |
Correct |
613 ms |
4180 KB |
Output is correct |
10 |
Correct |
596 ms |
4180 KB |
Output is correct |
11 |
Correct |
586 ms |
4180 KB |
Output is correct |
12 |
Correct |
25 ms |
4180 KB |
Output is correct |
13 |
Correct |
36 ms |
4180 KB |
Output is correct |
14 |
Correct |
15 ms |
4180 KB |
Output is correct |
15 |
Correct |
119 ms |
4180 KB |
Output is correct |
16 |
Correct |
0 ms |
212 KB |
Output is correct |
17 |
Correct |
607 ms |
4180 KB |
Output is correct |
18 |
Correct |
605 ms |
4180 KB |
Output is correct |
19 |
Correct |
610 ms |
4180 KB |
Output is correct |
20 |
Correct |
617 ms |
4180 KB |
Output is correct |
21 |
Correct |
582 ms |
4180 KB |
Output is correct |
22 |
Correct |
584 ms |
4180 KB |
Output is correct |
23 |
Correct |
1 ms |
212 KB |
Output is correct |
24 |
Correct |
1253 ms |
4180 KB |
Output is correct |
25 |
Correct |
1207 ms |
4180 KB |
Output is correct |
26 |
Correct |
1237 ms |
4180 KB |
Output is correct |
27 |
Correct |
1228 ms |
4180 KB |
Output is correct |
28 |
Correct |
1206 ms |
4180 KB |
Output is correct |
29 |
Correct |
1194 ms |
4260 KB |
Output is correct |
30 |
Correct |
117 ms |
4280 KB |
Output is correct |
31 |
Incorrect |
0 ms |
212 KB |
Output isn't correct |
32 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
117 ms |
4280 KB |
Output is correct |
2 |
Incorrect |
0 ms |
212 KB |
Output isn't correct |
3 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
24 ms |
4180 KB |
Output is correct |
2 |
Correct |
37 ms |
4180 KB |
Output is correct |
3 |
Correct |
14 ms |
4180 KB |
Output is correct |
4 |
Correct |
121 ms |
4180 KB |
Output is correct |
5 |
Correct |
0 ms |
212 KB |
Output is correct |
6 |
Correct |
599 ms |
4180 KB |
Output is correct |
7 |
Correct |
593 ms |
4180 KB |
Output is correct |
8 |
Correct |
627 ms |
4180 KB |
Output is correct |
9 |
Correct |
613 ms |
4180 KB |
Output is correct |
10 |
Correct |
596 ms |
4180 KB |
Output is correct |
11 |
Correct |
586 ms |
4180 KB |
Output is correct |
12 |
Correct |
25 ms |
4180 KB |
Output is correct |
13 |
Correct |
36 ms |
4180 KB |
Output is correct |
14 |
Correct |
15 ms |
4180 KB |
Output is correct |
15 |
Correct |
119 ms |
4180 KB |
Output is correct |
16 |
Correct |
0 ms |
212 KB |
Output is correct |
17 |
Correct |
607 ms |
4180 KB |
Output is correct |
18 |
Correct |
605 ms |
4180 KB |
Output is correct |
19 |
Correct |
610 ms |
4180 KB |
Output is correct |
20 |
Correct |
617 ms |
4180 KB |
Output is correct |
21 |
Correct |
582 ms |
4180 KB |
Output is correct |
22 |
Correct |
584 ms |
4180 KB |
Output is correct |
23 |
Correct |
1 ms |
212 KB |
Output is correct |
24 |
Correct |
1253 ms |
4180 KB |
Output is correct |
25 |
Correct |
1207 ms |
4180 KB |
Output is correct |
26 |
Correct |
1237 ms |
4180 KB |
Output is correct |
27 |
Correct |
1228 ms |
4180 KB |
Output is correct |
28 |
Correct |
1206 ms |
4180 KB |
Output is correct |
29 |
Correct |
1194 ms |
4260 KB |
Output is correct |
30 |
Correct |
117 ms |
4280 KB |
Output is correct |
31 |
Incorrect |
0 ms |
212 KB |
Output isn't correct |
32 |
Halted |
0 ms |
0 KB |
- |