#include "bits/stdc++.h"
using namespace std;
typedef long long ll;
typedef pair<ll, ll> pii;
typedef vector<pii> vpii;
typedef vector<ll> vi;
#define sz(x) (int)(x).size()
#define all(x) (x).begin(), (x).end()
const int MAXSIZE = 1000000;
int main()
{
ios::sync_with_stdio(false);
cin.tie(0);
ll M, L;
cin >> M >> L;
vi A(2 * M + 1);
for (int i = 0; i < sz(A); ++i)
cin >> A[i];
vi dp(MAXSIZE, -1);
ll center = MAXSIZE / 2;
dp[center] = A[M];
for (int foo = 0; foo < 2; ++foo)
{
reverse(all(A)), reverse(all(dp));
for (ll m = 1; m <= M; ++m)
{
ll maxNum = A[m + M];
for (ll r = 0; r < m; ++r)
{
priority_queue<pii, vpii> q;
for (int i = 0; m * i + r < sz(dp); ++i)
{
int idx = m * i + r;
while (!q.empty() && q.top().second < idx - maxNum * m)
q.pop();
if (dp[idx] != -1)
q.push({dp[idx] - i, idx});
if (!q.empty())
dp[idx] = i + q.top().first;
}
}
}
}
ll ans = -1;
if (0 <= center + L && center + L < sz(dp))
ans = dp[center + L];
if (ans == -1)
cout << "impossible\n";
else
cout << ans << "\n";
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
16 ms |
8148 KB |
Output is correct |
2 |
Correct |
21 ms |
8148 KB |
Output is correct |
3 |
Correct |
10 ms |
8088 KB |
Output is correct |
4 |
Correct |
69 ms |
8148 KB |
Output is correct |
5 |
Correct |
576 ms |
8148 KB |
Output is correct |
6 |
Correct |
599 ms |
8168 KB |
Output is correct |
7 |
Correct |
557 ms |
8152 KB |
Output is correct |
8 |
Correct |
599 ms |
8148 KB |
Output is correct |
9 |
Correct |
850 ms |
8292 KB |
Output is correct |
10 |
Correct |
485 ms |
8148 KB |
Output is correct |
11 |
Correct |
491 ms |
8148 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
16 ms |
8148 KB |
Output is correct |
2 |
Correct |
21 ms |
8148 KB |
Output is correct |
3 |
Correct |
10 ms |
8088 KB |
Output is correct |
4 |
Correct |
69 ms |
8148 KB |
Output is correct |
5 |
Correct |
576 ms |
8148 KB |
Output is correct |
6 |
Correct |
599 ms |
8168 KB |
Output is correct |
7 |
Correct |
557 ms |
8152 KB |
Output is correct |
8 |
Correct |
599 ms |
8148 KB |
Output is correct |
9 |
Correct |
850 ms |
8292 KB |
Output is correct |
10 |
Correct |
485 ms |
8148 KB |
Output is correct |
11 |
Correct |
491 ms |
8148 KB |
Output is correct |
12 |
Correct |
15 ms |
8148 KB |
Output is correct |
13 |
Correct |
21 ms |
8132 KB |
Output is correct |
14 |
Correct |
10 ms |
8148 KB |
Output is correct |
15 |
Correct |
67 ms |
8148 KB |
Output is correct |
16 |
Correct |
614 ms |
8160 KB |
Output is correct |
17 |
Correct |
655 ms |
8156 KB |
Output is correct |
18 |
Correct |
512 ms |
8152 KB |
Output is correct |
19 |
Correct |
644 ms |
8148 KB |
Output is correct |
20 |
Correct |
773 ms |
8148 KB |
Output is correct |
21 |
Correct |
468 ms |
8148 KB |
Output is correct |
22 |
Correct |
487 ms |
8148 KB |
Output is correct |
23 |
Correct |
3215 ms |
8332 KB |
Output is correct |
24 |
Correct |
3240 ms |
8296 KB |
Output is correct |
25 |
Correct |
1560 ms |
8284 KB |
Output is correct |
26 |
Execution timed out |
5068 ms |
8928 KB |
Time limit exceeded |
27 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
71 ms |
8148 KB |
Output is correct |
2 |
Incorrect |
697 ms |
12136 KB |
Output isn't correct |
3 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
71 ms |
8148 KB |
Output is correct |
2 |
Incorrect |
697 ms |
12136 KB |
Output isn't correct |
3 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
71 ms |
8148 KB |
Output is correct |
2 |
Incorrect |
697 ms |
12136 KB |
Output isn't correct |
3 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
16 ms |
8148 KB |
Output is correct |
2 |
Correct |
21 ms |
8148 KB |
Output is correct |
3 |
Correct |
10 ms |
8088 KB |
Output is correct |
4 |
Correct |
69 ms |
8148 KB |
Output is correct |
5 |
Correct |
576 ms |
8148 KB |
Output is correct |
6 |
Correct |
599 ms |
8168 KB |
Output is correct |
7 |
Correct |
557 ms |
8152 KB |
Output is correct |
8 |
Correct |
599 ms |
8148 KB |
Output is correct |
9 |
Correct |
850 ms |
8292 KB |
Output is correct |
10 |
Correct |
485 ms |
8148 KB |
Output is correct |
11 |
Correct |
491 ms |
8148 KB |
Output is correct |
12 |
Correct |
71 ms |
8148 KB |
Output is correct |
13 |
Incorrect |
697 ms |
12136 KB |
Output isn't correct |
14 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
71 ms |
8148 KB |
Output is correct |
2 |
Incorrect |
697 ms |
12136 KB |
Output isn't correct |
3 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
16 ms |
8148 KB |
Output is correct |
2 |
Correct |
21 ms |
8148 KB |
Output is correct |
3 |
Correct |
10 ms |
8088 KB |
Output is correct |
4 |
Correct |
69 ms |
8148 KB |
Output is correct |
5 |
Correct |
576 ms |
8148 KB |
Output is correct |
6 |
Correct |
599 ms |
8168 KB |
Output is correct |
7 |
Correct |
557 ms |
8152 KB |
Output is correct |
8 |
Correct |
599 ms |
8148 KB |
Output is correct |
9 |
Correct |
850 ms |
8292 KB |
Output is correct |
10 |
Correct |
485 ms |
8148 KB |
Output is correct |
11 |
Correct |
491 ms |
8148 KB |
Output is correct |
12 |
Correct |
15 ms |
8148 KB |
Output is correct |
13 |
Correct |
21 ms |
8132 KB |
Output is correct |
14 |
Correct |
10 ms |
8148 KB |
Output is correct |
15 |
Correct |
67 ms |
8148 KB |
Output is correct |
16 |
Correct |
614 ms |
8160 KB |
Output is correct |
17 |
Correct |
655 ms |
8156 KB |
Output is correct |
18 |
Correct |
512 ms |
8152 KB |
Output is correct |
19 |
Correct |
644 ms |
8148 KB |
Output is correct |
20 |
Correct |
773 ms |
8148 KB |
Output is correct |
21 |
Correct |
468 ms |
8148 KB |
Output is correct |
22 |
Correct |
487 ms |
8148 KB |
Output is correct |
23 |
Correct |
3215 ms |
8332 KB |
Output is correct |
24 |
Correct |
3240 ms |
8296 KB |
Output is correct |
25 |
Correct |
1560 ms |
8284 KB |
Output is correct |
26 |
Execution timed out |
5068 ms |
8928 KB |
Time limit exceeded |
27 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
71 ms |
8148 KB |
Output is correct |
2 |
Incorrect |
697 ms |
12136 KB |
Output isn't correct |
3 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
16 ms |
8148 KB |
Output is correct |
2 |
Correct |
21 ms |
8148 KB |
Output is correct |
3 |
Correct |
10 ms |
8088 KB |
Output is correct |
4 |
Correct |
69 ms |
8148 KB |
Output is correct |
5 |
Correct |
576 ms |
8148 KB |
Output is correct |
6 |
Correct |
599 ms |
8168 KB |
Output is correct |
7 |
Correct |
557 ms |
8152 KB |
Output is correct |
8 |
Correct |
599 ms |
8148 KB |
Output is correct |
9 |
Correct |
850 ms |
8292 KB |
Output is correct |
10 |
Correct |
485 ms |
8148 KB |
Output is correct |
11 |
Correct |
491 ms |
8148 KB |
Output is correct |
12 |
Correct |
15 ms |
8148 KB |
Output is correct |
13 |
Correct |
21 ms |
8132 KB |
Output is correct |
14 |
Correct |
10 ms |
8148 KB |
Output is correct |
15 |
Correct |
67 ms |
8148 KB |
Output is correct |
16 |
Correct |
614 ms |
8160 KB |
Output is correct |
17 |
Correct |
655 ms |
8156 KB |
Output is correct |
18 |
Correct |
512 ms |
8152 KB |
Output is correct |
19 |
Correct |
644 ms |
8148 KB |
Output is correct |
20 |
Correct |
773 ms |
8148 KB |
Output is correct |
21 |
Correct |
468 ms |
8148 KB |
Output is correct |
22 |
Correct |
487 ms |
8148 KB |
Output is correct |
23 |
Correct |
3215 ms |
8332 KB |
Output is correct |
24 |
Correct |
3240 ms |
8296 KB |
Output is correct |
25 |
Correct |
1560 ms |
8284 KB |
Output is correct |
26 |
Execution timed out |
5068 ms |
8928 KB |
Time limit exceeded |
27 |
Halted |
0 ms |
0 KB |
- |