#include<bits/stdc++.h>
using namespace std;
#define ll long long
int const M = 350;
int const MM = M*M;
int const off = 340;
int const off2 = off*off;
ll A[2*M];
ll dp[2][2*MM];
int m; ll l;
int main() {
cin >> m >> l;
for (int i = -m; i <= m; ++i) cin >> A[i+off];
ll zz = 0;
for (int i = -m; i <= m; ++i) {
zz += A[i+off] * i;
}
if (zz < 0) {
l = -l;
for (int i = -m; i < 0; ++i) {
int j = -i;
int idx = i+off, idx2 = j+off;
swap(A[idx], A[idx2]);
}
}
ll itm = 0;
memset(dp, 0xc3, sizeof dp);
dp[0][off2] = 0;
int idp = 1;
for (int i = -m; i <= m; ++i) {
ll take = i <= 0 ? A[i+off] : min(A[i+off], max(0LL, l / i));
l -= take * i;
A[i+off] -= take;
itm += take;
for (int j = -m*m; j <= m*m; ++j) dp[idp][j+off2] = dp[idp^1][j+off2];
if (i != 0) {
// try_add_to_dp A[i+off]
for (int j = -m*m; j <= m*m; ++j) {
for (int k = 1; (k <= A[i+off]) && (j-k*i>=-m*m) && (j-k*i<=m*m); ++k) {
dp[idp][j+off2] = max(dp[idp][j+off2], dp[idp^1][j-k*i+off2] + k);
}
}
// try_delete_from_dp take
for (int j = -m*m; j <= m*m; ++j) {
for (int k = 1; (k <= take) && (j+k*i>=-m*m) && (j+k*i<=m*m); ++k) {
dp[idp][j+off2] = max(dp[idp][j+off2], dp[idp^1][j+k*i+off2] - k);
}
}
}
idp ^= 1;
}
idp ^= 1;
if (l < -m*m || l > m*m || dp[idp][l+off2] < -1e9) {
cout << "impossible\n";
}
else {
cout << (dp[idp][l+off2] + itm) << '\n';
}
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
4184 KB |
Output is correct |
2 |
Correct |
2 ms |
4188 KB |
Output is correct |
3 |
Correct |
2 ms |
4136 KB |
Output is correct |
4 |
Correct |
2 ms |
4188 KB |
Output is correct |
5 |
Correct |
11 ms |
4276 KB |
Output is correct |
6 |
Correct |
13 ms |
4184 KB |
Output is correct |
7 |
Correct |
7 ms |
4188 KB |
Output is correct |
8 |
Correct |
12 ms |
4280 KB |
Output is correct |
9 |
Incorrect |
20 ms |
4272 KB |
Output isn't correct |
10 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
4184 KB |
Output is correct |
2 |
Correct |
2 ms |
4188 KB |
Output is correct |
3 |
Correct |
2 ms |
4136 KB |
Output is correct |
4 |
Correct |
2 ms |
4188 KB |
Output is correct |
5 |
Correct |
11 ms |
4276 KB |
Output is correct |
6 |
Correct |
13 ms |
4184 KB |
Output is correct |
7 |
Correct |
7 ms |
4188 KB |
Output is correct |
8 |
Correct |
12 ms |
4280 KB |
Output is correct |
9 |
Incorrect |
20 ms |
4272 KB |
Output isn't correct |
10 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
4168 KB |
Output is correct |
2 |
Correct |
5 ms |
4188 KB |
Output is correct |
3 |
Correct |
2 ms |
4188 KB |
Output is correct |
4 |
Correct |
6 ms |
4184 KB |
Output is correct |
5 |
Correct |
4 ms |
4280 KB |
Output is correct |
6 |
Correct |
5 ms |
4188 KB |
Output is correct |
7 |
Correct |
2 ms |
4188 KB |
Output is correct |
8 |
Correct |
2 ms |
4188 KB |
Output is correct |
9 |
Correct |
4 ms |
4188 KB |
Output is correct |
10 |
Correct |
3 ms |
4188 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
4168 KB |
Output is correct |
2 |
Correct |
5 ms |
4188 KB |
Output is correct |
3 |
Correct |
2 ms |
4188 KB |
Output is correct |
4 |
Correct |
6 ms |
4184 KB |
Output is correct |
5 |
Correct |
4 ms |
4280 KB |
Output is correct |
6 |
Correct |
5 ms |
4188 KB |
Output is correct |
7 |
Correct |
2 ms |
4188 KB |
Output is correct |
8 |
Correct |
2 ms |
4188 KB |
Output is correct |
9 |
Correct |
4 ms |
4188 KB |
Output is correct |
10 |
Correct |
3 ms |
4188 KB |
Output is correct |
11 |
Correct |
2 ms |
4188 KB |
Output is correct |
12 |
Correct |
2 ms |
4188 KB |
Output is correct |
13 |
Correct |
2 ms |
4188 KB |
Output is correct |
14 |
Correct |
2 ms |
4188 KB |
Output is correct |
15 |
Correct |
4 ms |
4188 KB |
Output is correct |
16 |
Correct |
2 ms |
4176 KB |
Output is correct |
17 |
Correct |
5 ms |
4188 KB |
Output is correct |
18 |
Correct |
3 ms |
4188 KB |
Output is correct |
19 |
Correct |
5 ms |
4188 KB |
Output is correct |
20 |
Correct |
2 ms |
4188 KB |
Output is correct |
21 |
Correct |
2 ms |
4188 KB |
Output is correct |
22 |
Correct |
4 ms |
4188 KB |
Output is correct |
23 |
Correct |
3 ms |
4184 KB |
Output is correct |
24 |
Correct |
6 ms |
4188 KB |
Output is correct |
25 |
Correct |
3 ms |
4188 KB |
Output is correct |
26 |
Incorrect |
6 ms |
4188 KB |
Output isn't correct |
27 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
4168 KB |
Output is correct |
2 |
Correct |
5 ms |
4188 KB |
Output is correct |
3 |
Correct |
2 ms |
4188 KB |
Output is correct |
4 |
Correct |
6 ms |
4184 KB |
Output is correct |
5 |
Correct |
4 ms |
4280 KB |
Output is correct |
6 |
Correct |
5 ms |
4188 KB |
Output is correct |
7 |
Correct |
2 ms |
4188 KB |
Output is correct |
8 |
Correct |
2 ms |
4188 KB |
Output is correct |
9 |
Correct |
4 ms |
4188 KB |
Output is correct |
10 |
Correct |
3 ms |
4188 KB |
Output is correct |
11 |
Correct |
2 ms |
4188 KB |
Output is correct |
12 |
Correct |
4 ms |
4188 KB |
Output is correct |
13 |
Correct |
2 ms |
4184 KB |
Output is correct |
14 |
Correct |
5 ms |
4288 KB |
Output is correct |
15 |
Correct |
4 ms |
4188 KB |
Output is correct |
16 |
Correct |
5 ms |
4200 KB |
Output is correct |
17 |
Correct |
2 ms |
4188 KB |
Output is correct |
18 |
Correct |
2 ms |
4188 KB |
Output is correct |
19 |
Correct |
4 ms |
4440 KB |
Output is correct |
20 |
Correct |
3 ms |
4188 KB |
Output is correct |
21 |
Correct |
4 ms |
4292 KB |
Output is correct |
22 |
Correct |
4 ms |
4188 KB |
Output is correct |
23 |
Correct |
15 ms |
4280 KB |
Output is correct |
24 |
Correct |
8 ms |
4188 KB |
Output is correct |
25 |
Correct |
24 ms |
4188 KB |
Output is correct |
26 |
Correct |
22 ms |
4276 KB |
Output is correct |
27 |
Correct |
27 ms |
4188 KB |
Output is correct |
28 |
Correct |
22 ms |
4184 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
4184 KB |
Output is correct |
2 |
Correct |
2 ms |
4188 KB |
Output is correct |
3 |
Correct |
2 ms |
4136 KB |
Output is correct |
4 |
Correct |
2 ms |
4188 KB |
Output is correct |
5 |
Correct |
11 ms |
4276 KB |
Output is correct |
6 |
Correct |
13 ms |
4184 KB |
Output is correct |
7 |
Correct |
7 ms |
4188 KB |
Output is correct |
8 |
Correct |
12 ms |
4280 KB |
Output is correct |
9 |
Incorrect |
20 ms |
4272 KB |
Output isn't correct |
10 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
4168 KB |
Output is correct |
2 |
Correct |
5 ms |
4188 KB |
Output is correct |
3 |
Correct |
2 ms |
4188 KB |
Output is correct |
4 |
Correct |
6 ms |
4184 KB |
Output is correct |
5 |
Correct |
4 ms |
4280 KB |
Output is correct |
6 |
Correct |
5 ms |
4188 KB |
Output is correct |
7 |
Correct |
2 ms |
4188 KB |
Output is correct |
8 |
Correct |
2 ms |
4188 KB |
Output is correct |
9 |
Correct |
4 ms |
4188 KB |
Output is correct |
10 |
Correct |
3 ms |
4188 KB |
Output is correct |
11 |
Correct |
2 ms |
4188 KB |
Output is correct |
12 |
Correct |
4 ms |
4188 KB |
Output is correct |
13 |
Correct |
2 ms |
4184 KB |
Output is correct |
14 |
Correct |
5 ms |
4288 KB |
Output is correct |
15 |
Correct |
4 ms |
4188 KB |
Output is correct |
16 |
Correct |
5 ms |
4200 KB |
Output is correct |
17 |
Correct |
2 ms |
4188 KB |
Output is correct |
18 |
Correct |
2 ms |
4188 KB |
Output is correct |
19 |
Correct |
4 ms |
4440 KB |
Output is correct |
20 |
Correct |
3 ms |
4188 KB |
Output is correct |
21 |
Correct |
4 ms |
4292 KB |
Output is correct |
22 |
Correct |
4 ms |
4188 KB |
Output is correct |
23 |
Correct |
15 ms |
4280 KB |
Output is correct |
24 |
Correct |
8 ms |
4188 KB |
Output is correct |
25 |
Correct |
24 ms |
4188 KB |
Output is correct |
26 |
Correct |
22 ms |
4276 KB |
Output is correct |
27 |
Correct |
27 ms |
4188 KB |
Output is correct |
28 |
Correct |
22 ms |
4184 KB |
Output is correct |
29 |
Correct |
2 ms |
4188 KB |
Output is correct |
30 |
Correct |
4 ms |
4188 KB |
Output is correct |
31 |
Correct |
2 ms |
4188 KB |
Output is correct |
32 |
Correct |
5 ms |
4116 KB |
Output is correct |
33 |
Correct |
3 ms |
4188 KB |
Output is correct |
34 |
Correct |
5 ms |
4188 KB |
Output is correct |
35 |
Correct |
2 ms |
4188 KB |
Output is correct |
36 |
Correct |
2 ms |
4188 KB |
Output is correct |
37 |
Correct |
4 ms |
4184 KB |
Output is correct |
38 |
Correct |
4 ms |
4444 KB |
Output is correct |
39 |
Correct |
3 ms |
4188 KB |
Output is correct |
40 |
Correct |
3 ms |
4184 KB |
Output is correct |
41 |
Correct |
15 ms |
4188 KB |
Output is correct |
42 |
Correct |
8 ms |
4188 KB |
Output is correct |
43 |
Correct |
22 ms |
4188 KB |
Output is correct |
44 |
Correct |
22 ms |
4188 KB |
Output is correct |
45 |
Correct |
27 ms |
4272 KB |
Output is correct |
46 |
Correct |
20 ms |
4184 KB |
Output is correct |
47 |
Correct |
11 ms |
4188 KB |
Output is correct |
48 |
Correct |
12 ms |
4188 KB |
Output is correct |
49 |
Correct |
410 ms |
4188 KB |
Output is correct |
50 |
Correct |
72 ms |
4188 KB |
Output is correct |
51 |
Correct |
475 ms |
4188 KB |
Output is correct |
52 |
Correct |
390 ms |
4256 KB |
Output is correct |
53 |
Correct |
455 ms |
4188 KB |
Output is correct |
54 |
Correct |
377 ms |
4188 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
4184 KB |
Output is correct |
2 |
Correct |
2 ms |
4188 KB |
Output is correct |
3 |
Correct |
2 ms |
4136 KB |
Output is correct |
4 |
Correct |
2 ms |
4188 KB |
Output is correct |
5 |
Correct |
11 ms |
4276 KB |
Output is correct |
6 |
Correct |
13 ms |
4184 KB |
Output is correct |
7 |
Correct |
7 ms |
4188 KB |
Output is correct |
8 |
Correct |
12 ms |
4280 KB |
Output is correct |
9 |
Incorrect |
20 ms |
4272 KB |
Output isn't correct |
10 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
4168 KB |
Output is correct |
2 |
Correct |
5 ms |
4188 KB |
Output is correct |
3 |
Correct |
2 ms |
4188 KB |
Output is correct |
4 |
Correct |
6 ms |
4184 KB |
Output is correct |
5 |
Correct |
4 ms |
4280 KB |
Output is correct |
6 |
Correct |
5 ms |
4188 KB |
Output is correct |
7 |
Correct |
2 ms |
4188 KB |
Output is correct |
8 |
Correct |
2 ms |
4188 KB |
Output is correct |
9 |
Correct |
4 ms |
4188 KB |
Output is correct |
10 |
Correct |
3 ms |
4188 KB |
Output is correct |
11 |
Correct |
2 ms |
4188 KB |
Output is correct |
12 |
Correct |
4 ms |
4188 KB |
Output is correct |
13 |
Correct |
2 ms |
4184 KB |
Output is correct |
14 |
Correct |
5 ms |
4288 KB |
Output is correct |
15 |
Correct |
4 ms |
4188 KB |
Output is correct |
16 |
Correct |
5 ms |
4200 KB |
Output is correct |
17 |
Correct |
2 ms |
4188 KB |
Output is correct |
18 |
Correct |
2 ms |
4188 KB |
Output is correct |
19 |
Correct |
4 ms |
4440 KB |
Output is correct |
20 |
Correct |
3 ms |
4188 KB |
Output is correct |
21 |
Correct |
4 ms |
4292 KB |
Output is correct |
22 |
Correct |
4 ms |
4188 KB |
Output is correct |
23 |
Correct |
15 ms |
4280 KB |
Output is correct |
24 |
Correct |
8 ms |
4188 KB |
Output is correct |
25 |
Correct |
24 ms |
4188 KB |
Output is correct |
26 |
Correct |
22 ms |
4276 KB |
Output is correct |
27 |
Correct |
27 ms |
4188 KB |
Output is correct |
28 |
Correct |
22 ms |
4184 KB |
Output is correct |
29 |
Correct |
2 ms |
4188 KB |
Output is correct |
30 |
Correct |
4 ms |
4188 KB |
Output is correct |
31 |
Correct |
2 ms |
4188 KB |
Output is correct |
32 |
Correct |
5 ms |
4116 KB |
Output is correct |
33 |
Correct |
3 ms |
4188 KB |
Output is correct |
34 |
Correct |
5 ms |
4188 KB |
Output is correct |
35 |
Correct |
2 ms |
4188 KB |
Output is correct |
36 |
Correct |
2 ms |
4188 KB |
Output is correct |
37 |
Correct |
4 ms |
4184 KB |
Output is correct |
38 |
Correct |
4 ms |
4444 KB |
Output is correct |
39 |
Correct |
3 ms |
4188 KB |
Output is correct |
40 |
Correct |
3 ms |
4184 KB |
Output is correct |
41 |
Correct |
15 ms |
4188 KB |
Output is correct |
42 |
Correct |
8 ms |
4188 KB |
Output is correct |
43 |
Correct |
22 ms |
4188 KB |
Output is correct |
44 |
Correct |
22 ms |
4188 KB |
Output is correct |
45 |
Correct |
27 ms |
4272 KB |
Output is correct |
46 |
Correct |
20 ms |
4184 KB |
Output is correct |
47 |
Correct |
11 ms |
4188 KB |
Output is correct |
48 |
Correct |
12 ms |
4188 KB |
Output is correct |
49 |
Correct |
410 ms |
4188 KB |
Output is correct |
50 |
Correct |
72 ms |
4188 KB |
Output is correct |
51 |
Correct |
475 ms |
4188 KB |
Output is correct |
52 |
Correct |
390 ms |
4256 KB |
Output is correct |
53 |
Correct |
455 ms |
4188 KB |
Output is correct |
54 |
Correct |
377 ms |
4188 KB |
Output is correct |
55 |
Correct |
2 ms |
4188 KB |
Output is correct |
56 |
Correct |
4 ms |
4184 KB |
Output is correct |
57 |
Correct |
2 ms |
4188 KB |
Output is correct |
58 |
Correct |
5 ms |
4188 KB |
Output is correct |
59 |
Correct |
4 ms |
4184 KB |
Output is correct |
60 |
Correct |
5 ms |
4188 KB |
Output is correct |
61 |
Correct |
2 ms |
4188 KB |
Output is correct |
62 |
Correct |
2 ms |
4188 KB |
Output is correct |
63 |
Correct |
4 ms |
4188 KB |
Output is correct |
64 |
Correct |
3 ms |
4188 KB |
Output is correct |
65 |
Correct |
3 ms |
4288 KB |
Output is correct |
66 |
Correct |
3 ms |
4188 KB |
Output is correct |
67 |
Correct |
16 ms |
4280 KB |
Output is correct |
68 |
Correct |
7 ms |
4188 KB |
Output is correct |
69 |
Correct |
21 ms |
4188 KB |
Output is correct |
70 |
Correct |
22 ms |
4188 KB |
Output is correct |
71 |
Correct |
27 ms |
4280 KB |
Output is correct |
72 |
Correct |
26 ms |
4188 KB |
Output is correct |
73 |
Correct |
11 ms |
4184 KB |
Output is correct |
74 |
Correct |
11 ms |
4280 KB |
Output is correct |
75 |
Correct |
411 ms |
4188 KB |
Output is correct |
76 |
Correct |
69 ms |
4184 KB |
Output is correct |
77 |
Correct |
475 ms |
4256 KB |
Output is correct |
78 |
Correct |
391 ms |
4188 KB |
Output is correct |
79 |
Correct |
479 ms |
4028 KB |
Output is correct |
80 |
Correct |
383 ms |
4252 KB |
Output is correct |
81 |
Execution timed out |
5065 ms |
4188 KB |
Time limit exceeded |
82 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
4184 KB |
Output is correct |
2 |
Correct |
2 ms |
4188 KB |
Output is correct |
3 |
Correct |
2 ms |
4136 KB |
Output is correct |
4 |
Correct |
2 ms |
4188 KB |
Output is correct |
5 |
Correct |
11 ms |
4276 KB |
Output is correct |
6 |
Correct |
13 ms |
4184 KB |
Output is correct |
7 |
Correct |
7 ms |
4188 KB |
Output is correct |
8 |
Correct |
12 ms |
4280 KB |
Output is correct |
9 |
Incorrect |
20 ms |
4272 KB |
Output isn't correct |
10 |
Halted |
0 ms |
0 KB |
- |