#include <bits/stdc++.h>
using namespace std;
int dp[205][205][205][2]; //[L][R][got][where]
int main () {
int n,p;
scanf ("%d %d",&n,&p);
auto dist = [&] (int a, int b) {int d = abs(a-b); return min(d,p-d);};
vector<int> pos(n+1), t(n+1);
for (int i = 1; i <= n; i++) scanf ("%d",&pos[i]);
for (int i = 1; i <= n; i++) scanf ("%d",&t[i]);
memset(dp,0x3f,sizeof dp);
dp[0][0][0][0] = dp[0][0][0][1] = 0; int ret = 0; ++n;
for (int len = 2; len <= n; len++) {
for (int st = 1 - len; st <= 0; st++) {
int l = (st + n) % n, r = (l + len - 1) % n;
for (int taken = 0; taken < len; taken++) {
int l2 = (l + 1) % n, r2 = (r - 1 + n) % n;
dp[l][r][taken][0] = min({dp[l][r][taken][0],dp[l2][r][taken][0] + dist(pos[l2],pos[l]), dp[l2][r][taken][1] + dist(pos[r],pos[l])});
dp[l][r][taken][1] = min({dp[l][r][taken][1],dp[l][r2][taken][0] + dist(pos[l],pos[r]), dp[l][r2][taken][1] + dist(pos[r2],pos[r])});
if (taken) {
if (dp[l2][r][taken-1][0] + dist(pos[l2],pos[l]) <= t[l]) {
dp[l][r][taken][0] = min(dp[l][r][taken][0],dp[l2][r][taken-1][0] + dist(pos[l2],pos[l]));
}
if (dp[l2][r][taken-1][1] + dist(pos[l],pos[r]) <= t[l]) {
dp[l][r][taken][0] = min(dp[l][r][taken][0],dp[l2][r][taken-1][1] + dist(pos[l],pos[r]));
}
if (dp[l][r2][taken-1][0] + dist(pos[l],pos[r]) <= t[r]) {
dp[l][r][taken][1] = min(dp[l][r][taken][1],dp[l][r2][taken-1][0] + dist(pos[l],pos[r]));
}
if (dp[l][r2][taken-1][1] + dist(pos[r2],pos[r]) <= t[r]) {
dp[l][r][taken][1] = min(dp[l][r][taken][1],dp[l][r2][taken-1][1] + dist(pos[r2],pos[r]));
}
}
if (min(dp[l][r][taken][0],dp[l][r][taken][1]) <= 1'000'000'000) ret = max(ret,taken);
}
}
}
printf ("%d\n",ret);
return 0;
}
Compilation message
ho_t3.cpp: In function 'int main()':
ho_t3.cpp:6:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
6 | scanf ("%d %d",&n,&p);
| ~~~~~~^~~~~~~~~~~~~~~
ho_t3.cpp:9:37: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
9 | for (int i = 1; i <= n; i++) scanf ("%d",&pos[i]);
| ~~~~~~^~~~~~~~~~~~~~
ho_t3.cpp:10:37: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
10 | for (int i = 1; i <= n; i++) scanf ("%d",&t[i]);
| ~~~~~~^~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
37 ms |
67840 KB |
Output is correct |
| 2 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 3 |
Correct |
36 ms |
67820 KB |
Output is correct |
| 4 |
Correct |
42 ms |
67692 KB |
Output is correct |
| 5 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 6 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 7 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 8 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 9 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 10 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 11 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 12 |
Correct |
38 ms |
67692 KB |
Output is correct |
| 13 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 14 |
Correct |
36 ms |
67692 KB |
Output is correct |
| 15 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 16 |
Correct |
40 ms |
67692 KB |
Output is correct |
| 17 |
Correct |
38 ms |
67692 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
37 ms |
67840 KB |
Output is correct |
| 2 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 3 |
Correct |
36 ms |
67820 KB |
Output is correct |
| 4 |
Correct |
42 ms |
67692 KB |
Output is correct |
| 5 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 6 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 7 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 8 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 9 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 10 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 11 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 12 |
Correct |
38 ms |
67692 KB |
Output is correct |
| 13 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 14 |
Correct |
36 ms |
67692 KB |
Output is correct |
| 15 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 16 |
Correct |
40 ms |
67692 KB |
Output is correct |
| 17 |
Correct |
38 ms |
67692 KB |
Output is correct |
| 18 |
Correct |
36 ms |
67692 KB |
Output is correct |
| 19 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 20 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 21 |
Correct |
37 ms |
67820 KB |
Output is correct |
| 22 |
Correct |
37 ms |
67820 KB |
Output is correct |
| 23 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 24 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 25 |
Correct |
39 ms |
67692 KB |
Output is correct |
| 26 |
Correct |
44 ms |
67692 KB |
Output is correct |
| 27 |
Correct |
38 ms |
67692 KB |
Output is correct |
| 28 |
Correct |
38 ms |
67820 KB |
Output is correct |
| 29 |
Correct |
36 ms |
67692 KB |
Output is correct |
| 30 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 31 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 32 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 33 |
Correct |
39 ms |
67692 KB |
Output is correct |
| 34 |
Correct |
37 ms |
67820 KB |
Output is correct |
| 35 |
Correct |
38 ms |
67692 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
37 ms |
67840 KB |
Output is correct |
| 2 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 3 |
Correct |
36 ms |
67820 KB |
Output is correct |
| 4 |
Correct |
42 ms |
67692 KB |
Output is correct |
| 5 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 6 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 7 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 8 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 9 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 10 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 11 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 12 |
Correct |
38 ms |
67692 KB |
Output is correct |
| 13 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 14 |
Correct |
36 ms |
67692 KB |
Output is correct |
| 15 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 16 |
Correct |
40 ms |
67692 KB |
Output is correct |
| 17 |
Correct |
38 ms |
67692 KB |
Output is correct |
| 18 |
Correct |
80 ms |
67692 KB |
Output is correct |
| 19 |
Correct |
50 ms |
67692 KB |
Output is correct |
| 20 |
Correct |
42 ms |
67692 KB |
Output is correct |
| 21 |
Correct |
51 ms |
67820 KB |
Output is correct |
| 22 |
Correct |
66 ms |
67692 KB |
Output is correct |
| 23 |
Correct |
48 ms |
67692 KB |
Output is correct |
| 24 |
Correct |
39 ms |
67692 KB |
Output is correct |
| 25 |
Correct |
41 ms |
67692 KB |
Output is correct |
| 26 |
Correct |
38 ms |
67692 KB |
Output is correct |
| 27 |
Correct |
42 ms |
67692 KB |
Output is correct |
| 28 |
Correct |
40 ms |
67692 KB |
Output is correct |
| 29 |
Correct |
46 ms |
67820 KB |
Output is correct |
| 30 |
Correct |
40 ms |
67820 KB |
Output is correct |
| 31 |
Correct |
41 ms |
67692 KB |
Output is correct |
| 32 |
Correct |
38 ms |
67692 KB |
Output is correct |
| 33 |
Correct |
42 ms |
67692 KB |
Output is correct |
| 34 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 35 |
Correct |
41 ms |
67692 KB |
Output is correct |
| 36 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 37 |
Correct |
43 ms |
67692 KB |
Output is correct |
| 38 |
Correct |
38 ms |
67692 KB |
Output is correct |
| 39 |
Correct |
41 ms |
67692 KB |
Output is correct |
| 40 |
Correct |
39 ms |
67692 KB |
Output is correct |
| 41 |
Correct |
77 ms |
67820 KB |
Output is correct |
| 42 |
Correct |
63 ms |
67692 KB |
Output is correct |
| 43 |
Correct |
79 ms |
67692 KB |
Output is correct |
| 44 |
Correct |
59 ms |
67692 KB |
Output is correct |
| 45 |
Correct |
76 ms |
67920 KB |
Output is correct |
| 46 |
Correct |
60 ms |
67692 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
37 ms |
67840 KB |
Output is correct |
| 2 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 3 |
Correct |
36 ms |
67820 KB |
Output is correct |
| 4 |
Correct |
42 ms |
67692 KB |
Output is correct |
| 5 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 6 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 7 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 8 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 9 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 10 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 11 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 12 |
Correct |
38 ms |
67692 KB |
Output is correct |
| 13 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 14 |
Correct |
36 ms |
67692 KB |
Output is correct |
| 15 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 16 |
Correct |
40 ms |
67692 KB |
Output is correct |
| 17 |
Correct |
38 ms |
67692 KB |
Output is correct |
| 18 |
Correct |
36 ms |
67692 KB |
Output is correct |
| 19 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 20 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 21 |
Correct |
37 ms |
67820 KB |
Output is correct |
| 22 |
Correct |
37 ms |
67820 KB |
Output is correct |
| 23 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 24 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 25 |
Correct |
39 ms |
67692 KB |
Output is correct |
| 26 |
Correct |
44 ms |
67692 KB |
Output is correct |
| 27 |
Correct |
38 ms |
67692 KB |
Output is correct |
| 28 |
Correct |
38 ms |
67820 KB |
Output is correct |
| 29 |
Correct |
36 ms |
67692 KB |
Output is correct |
| 30 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 31 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 32 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 33 |
Correct |
39 ms |
67692 KB |
Output is correct |
| 34 |
Correct |
37 ms |
67820 KB |
Output is correct |
| 35 |
Correct |
38 ms |
67692 KB |
Output is correct |
| 36 |
Correct |
80 ms |
67692 KB |
Output is correct |
| 37 |
Correct |
50 ms |
67692 KB |
Output is correct |
| 38 |
Correct |
42 ms |
67692 KB |
Output is correct |
| 39 |
Correct |
51 ms |
67820 KB |
Output is correct |
| 40 |
Correct |
66 ms |
67692 KB |
Output is correct |
| 41 |
Correct |
48 ms |
67692 KB |
Output is correct |
| 42 |
Correct |
39 ms |
67692 KB |
Output is correct |
| 43 |
Correct |
41 ms |
67692 KB |
Output is correct |
| 44 |
Correct |
38 ms |
67692 KB |
Output is correct |
| 45 |
Correct |
42 ms |
67692 KB |
Output is correct |
| 46 |
Correct |
40 ms |
67692 KB |
Output is correct |
| 47 |
Correct |
46 ms |
67820 KB |
Output is correct |
| 48 |
Correct |
40 ms |
67820 KB |
Output is correct |
| 49 |
Correct |
41 ms |
67692 KB |
Output is correct |
| 50 |
Correct |
38 ms |
67692 KB |
Output is correct |
| 51 |
Correct |
42 ms |
67692 KB |
Output is correct |
| 52 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 53 |
Correct |
41 ms |
67692 KB |
Output is correct |
| 54 |
Correct |
37 ms |
67692 KB |
Output is correct |
| 55 |
Correct |
43 ms |
67692 KB |
Output is correct |
| 56 |
Correct |
38 ms |
67692 KB |
Output is correct |
| 57 |
Correct |
41 ms |
67692 KB |
Output is correct |
| 58 |
Correct |
39 ms |
67692 KB |
Output is correct |
| 59 |
Correct |
77 ms |
67820 KB |
Output is correct |
| 60 |
Correct |
63 ms |
67692 KB |
Output is correct |
| 61 |
Correct |
79 ms |
67692 KB |
Output is correct |
| 62 |
Correct |
59 ms |
67692 KB |
Output is correct |
| 63 |
Correct |
76 ms |
67920 KB |
Output is correct |
| 64 |
Correct |
60 ms |
67692 KB |
Output is correct |
| 65 |
Correct |
71 ms |
67820 KB |
Output is correct |
| 66 |
Correct |
65 ms |
67692 KB |
Output is correct |
| 67 |
Correct |
65 ms |
67820 KB |
Output is correct |
| 68 |
Correct |
61 ms |
67692 KB |
Output is correct |
| 69 |
Correct |
71 ms |
67820 KB |
Output is correct |
| 70 |
Correct |
81 ms |
67692 KB |
Output is correct |
| 71 |
Correct |
67 ms |
67692 KB |
Output is correct |
| 72 |
Correct |
77 ms |
67692 KB |
Output is correct |
| 73 |
Correct |
66 ms |
67692 KB |
Output is correct |
| 74 |
Correct |
74 ms |
67692 KB |
Output is correct |
| 75 |
Correct |
68 ms |
67692 KB |
Output is correct |
| 76 |
Correct |
79 ms |
67692 KB |
Output is correct |
| 77 |
Correct |
75 ms |
67692 KB |
Output is correct |
| 78 |
Correct |
65 ms |
67692 KB |
Output is correct |
| 79 |
Correct |
64 ms |
67692 KB |
Output is correct |
| 80 |
Correct |
78 ms |
67692 KB |
Output is correct |
| 81 |
Correct |
65 ms |
67692 KB |
Output is correct |
| 82 |
Correct |
83 ms |
67692 KB |
Output is correct |
| 83 |
Correct |
75 ms |
67692 KB |
Output is correct |
| 84 |
Correct |
71 ms |
67820 KB |
Output is correct |
| 85 |
Correct |
71 ms |
67692 KB |
Output is correct |
| 86 |
Correct |
86 ms |
67820 KB |
Output is correct |
| 87 |
Correct |
78 ms |
67692 KB |
Output is correct |
| 88 |
Correct |
81 ms |
67820 KB |
Output is correct |
| 89 |
Correct |
78 ms |
67692 KB |
Output is correct |
| 90 |
Correct |
65 ms |
67692 KB |
Output is correct |
| 91 |
Correct |
80 ms |
67692 KB |
Output is correct |
| 92 |
Correct |
77 ms |
67692 KB |
Output is correct |
| 93 |
Correct |
79 ms |
67692 KB |
Output is correct |
