#include <bits/stdc++.h>
using namespace std;
const int MAXN = 200;
const long long INF = 0x3f3f3f3f'3f3f3f3fLL;
//leftmost: i, rightmost: j, visited: 0, cur: left or right. time
long long dp[MAXN+2][MAXN+2][MAXN+2][2];
int N, L;
int X[MAXN+1], T[MAXN+1];
int main()
{
scanf("%d%d", &N, &L);
for(int i=1; i<=N; ++i) scanf("%d", X+i);
for(int i=1; i<=N; ++i) scanf("%d", T+i);
memset(dp, 0x3f, sizeof dp);
dp[N+1][0][0][0] = dp[N+1][0][0][1] = 0;
int ans = 0;
for(int imj = N; imj>0; --imj)
{
for(int i=imj; i<=N+1; ++i)
{
int j = i-imj;
for(int t=0; t<=N-imj+1; ++t)
{
long long ptime, d;
if(i != N+1)
{
ptime = dp[i+1][j][t][0];
d = abs(X[i]-X[i+1]); d = min(d, L-d);
if(ptime+d<=T[i])
dp[i][j][t+1][0] = min(dp[i][j][t+1][0], ptime+d);
else
dp[i][j][t][0] = min(dp[i][j][t][0], ptime+d);
ptime = dp[i+1][j][t][1];
d = abs(X[i]-X[j]); d = min(d, L-d);
if(ptime+d<=T[i])
dp[i][j][t+1][0] = min(dp[i][j][t+1][0], ptime+d);
else
dp[i][j][t][0] = min(dp[i][j][t][0], ptime+d);
}
if(j != 0)
{
ptime = dp[i][j-1][t][0];
d = abs(X[j]-X[i]); d = min(d, L-d);
if(ptime+d<=T[j])
dp[i][j][t+1][1] = min(dp[i][j][t+1][1], ptime+d);
else
dp[i][j][t][1] = min(dp[i][j][t][1], ptime+d);
ptime = dp[i][j-1][t][1];
d = abs(X[j]-X[j-1]); d = min(d, L-d);
if(ptime+d<=T[j])
dp[i][j][t+1][1] = min(dp[i][j][t+1][1], ptime+d);
else
dp[i][j][t][1] = min(dp[i][j][t][1], ptime+d);
}
if(dp[i][j][t][0] < INF || dp[i][j][t][1] <INF)
ans = max(ans, t);
//printf("%d %d %d %lld %lld\n",i,j,t, dp[i][j][t][0], dp[i][j][t][1]);
}
}
}
for(int i=1; i<=N; ++i)
for(int j=0; j<=N; ++j)
if(dp[i][i][j][0]<INF || dp[i][i][j][1]<INF)
ans = max(ans, j);
printf("%d\n", ans);
}
Compilation message
ho_t3.cpp: In function 'int main()':
ho_t3.cpp:13:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d", &N, &L);
~~~~~^~~~~~~~~~~~~~~~
ho_t3.cpp:14:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
for(int i=1; i<=N; ++i) scanf("%d", X+i);
~~~~~^~~~~~~~~~~
ho_t3.cpp:15:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
for(int i=1; i<=N; ++i) scanf("%d", T+i);
~~~~~^~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
66 ms |
129400 KB |
Output is correct |
| 2 |
Correct |
66 ms |
129400 KB |
Output is correct |
| 3 |
Correct |
66 ms |
129400 KB |
Output is correct |
| 4 |
Correct |
65 ms |
129404 KB |
Output is correct |
| 5 |
Correct |
67 ms |
129400 KB |
Output is correct |
| 6 |
Correct |
64 ms |
129400 KB |
Output is correct |
| 7 |
Correct |
65 ms |
129400 KB |
Output is correct |
| 8 |
Correct |
67 ms |
129400 KB |
Output is correct |
| 9 |
Correct |
67 ms |
129400 KB |
Output is correct |
| 10 |
Correct |
65 ms |
129400 KB |
Output is correct |
| 11 |
Correct |
67 ms |
129400 KB |
Output is correct |
| 12 |
Correct |
65 ms |
129400 KB |
Output is correct |
| 13 |
Correct |
66 ms |
129400 KB |
Output is correct |
| 14 |
Correct |
65 ms |
129400 KB |
Output is correct |
| 15 |
Correct |
65 ms |
129400 KB |
Output is correct |
| 16 |
Correct |
66 ms |
129400 KB |
Output is correct |
| 17 |
Correct |
64 ms |
129400 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
66 ms |
129400 KB |
Output is correct |
| 2 |
Correct |
66 ms |
129400 KB |
Output is correct |
| 3 |
Correct |
66 ms |
129400 KB |
Output is correct |
| 4 |
Correct |
65 ms |
129404 KB |
Output is correct |
| 5 |
Correct |
67 ms |
129400 KB |
Output is correct |
| 6 |
Correct |
64 ms |
129400 KB |
Output is correct |
| 7 |
Correct |
65 ms |
129400 KB |
Output is correct |
| 8 |
Correct |
67 ms |
129400 KB |
Output is correct |
| 9 |
Correct |
67 ms |
129400 KB |
Output is correct |
| 10 |
Correct |
65 ms |
129400 KB |
Output is correct |
| 11 |
Correct |
67 ms |
129400 KB |
Output is correct |
| 12 |
Correct |
65 ms |
129400 KB |
Output is correct |
| 13 |
Correct |
66 ms |
129400 KB |
Output is correct |
| 14 |
Correct |
65 ms |
129400 KB |
Output is correct |
| 15 |
Correct |
65 ms |
129400 KB |
Output is correct |
| 16 |
Correct |
66 ms |
129400 KB |
Output is correct |
| 17 |
Correct |
64 ms |
129400 KB |
Output is correct |
| 18 |
Correct |
66 ms |
129404 KB |
Output is correct |
| 19 |
Correct |
65 ms |
129400 KB |
Output is correct |
| 20 |
Correct |
64 ms |
129404 KB |
Output is correct |
| 21 |
Correct |
65 ms |
129400 KB |
Output is correct |
| 22 |
Correct |
64 ms |
129400 KB |
Output is correct |
| 23 |
Correct |
64 ms |
129400 KB |
Output is correct |
| 24 |
Correct |
64 ms |
129400 KB |
Output is correct |
| 25 |
Correct |
64 ms |
129400 KB |
Output is correct |
| 26 |
Correct |
66 ms |
129400 KB |
Output is correct |
| 27 |
Correct |
65 ms |
129400 KB |
Output is correct |
| 28 |
Correct |
65 ms |
129400 KB |
Output is correct |
| 29 |
Correct |
65 ms |
129400 KB |
Output is correct |
| 30 |
Correct |
65 ms |
129404 KB |
Output is correct |
| 31 |
Correct |
65 ms |
129400 KB |
Output is correct |
| 32 |
Correct |
66 ms |
129400 KB |
Output is correct |
| 33 |
Correct |
64 ms |
129400 KB |
Output is correct |
| 34 |
Correct |
66 ms |
129400 KB |
Output is correct |
| 35 |
Correct |
66 ms |
129400 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
66 ms |
129400 KB |
Output is correct |
| 2 |
Correct |
66 ms |
129400 KB |
Output is correct |
| 3 |
Correct |
66 ms |
129400 KB |
Output is correct |
| 4 |
Correct |
65 ms |
129404 KB |
Output is correct |
| 5 |
Correct |
67 ms |
129400 KB |
Output is correct |
| 6 |
Correct |
64 ms |
129400 KB |
Output is correct |
| 7 |
Correct |
65 ms |
129400 KB |
Output is correct |
| 8 |
Correct |
67 ms |
129400 KB |
Output is correct |
| 9 |
Correct |
67 ms |
129400 KB |
Output is correct |
| 10 |
Correct |
65 ms |
129400 KB |
Output is correct |
| 11 |
Correct |
67 ms |
129400 KB |
Output is correct |
| 12 |
Correct |
65 ms |
129400 KB |
Output is correct |
| 13 |
Correct |
66 ms |
129400 KB |
Output is correct |
| 14 |
Correct |
65 ms |
129400 KB |
Output is correct |
| 15 |
Correct |
65 ms |
129400 KB |
Output is correct |
| 16 |
Correct |
66 ms |
129400 KB |
Output is correct |
| 17 |
Correct |
64 ms |
129400 KB |
Output is correct |
| 18 |
Correct |
91 ms |
129400 KB |
Output is correct |
| 19 |
Correct |
87 ms |
129400 KB |
Output is correct |
| 20 |
Correct |
71 ms |
129400 KB |
Output is correct |
| 21 |
Correct |
79 ms |
129400 KB |
Output is correct |
| 22 |
Correct |
82 ms |
129400 KB |
Output is correct |
| 23 |
Correct |
69 ms |
129400 KB |
Output is correct |
| 24 |
Correct |
67 ms |
129400 KB |
Output is correct |
| 25 |
Correct |
68 ms |
129400 KB |
Output is correct |
| 26 |
Correct |
66 ms |
129400 KB |
Output is correct |
| 27 |
Correct |
72 ms |
129528 KB |
Output is correct |
| 28 |
Correct |
67 ms |
129400 KB |
Output is correct |
| 29 |
Correct |
70 ms |
129400 KB |
Output is correct |
| 30 |
Correct |
68 ms |
129400 KB |
Output is correct |
| 31 |
Correct |
68 ms |
129400 KB |
Output is correct |
| 32 |
Correct |
66 ms |
129400 KB |
Output is correct |
| 33 |
Correct |
68 ms |
129432 KB |
Output is correct |
| 34 |
Correct |
66 ms |
129400 KB |
Output is correct |
| 35 |
Correct |
78 ms |
129400 KB |
Output is correct |
| 36 |
Correct |
66 ms |
129400 KB |
Output is correct |
| 37 |
Correct |
68 ms |
129404 KB |
Output is correct |
| 38 |
Correct |
66 ms |
129400 KB |
Output is correct |
| 39 |
Correct |
69 ms |
129400 KB |
Output is correct |
| 40 |
Correct |
67 ms |
129400 KB |
Output is correct |
| 41 |
Correct |
99 ms |
129400 KB |
Output is correct |
| 42 |
Correct |
84 ms |
129400 KB |
Output is correct |
| 43 |
Correct |
97 ms |
129400 KB |
Output is correct |
| 44 |
Correct |
82 ms |
129400 KB |
Output is correct |
| 45 |
Correct |
99 ms |
129400 KB |
Output is correct |
| 46 |
Correct |
82 ms |
129400 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
66 ms |
129400 KB |
Output is correct |
| 2 |
Correct |
66 ms |
129400 KB |
Output is correct |
| 3 |
Correct |
66 ms |
129400 KB |
Output is correct |
| 4 |
Correct |
65 ms |
129404 KB |
Output is correct |
| 5 |
Correct |
67 ms |
129400 KB |
Output is correct |
| 6 |
Correct |
64 ms |
129400 KB |
Output is correct |
| 7 |
Correct |
65 ms |
129400 KB |
Output is correct |
| 8 |
Correct |
67 ms |
129400 KB |
Output is correct |
| 9 |
Correct |
67 ms |
129400 KB |
Output is correct |
| 10 |
Correct |
65 ms |
129400 KB |
Output is correct |
| 11 |
Correct |
67 ms |
129400 KB |
Output is correct |
| 12 |
Correct |
65 ms |
129400 KB |
Output is correct |
| 13 |
Correct |
66 ms |
129400 KB |
Output is correct |
| 14 |
Correct |
65 ms |
129400 KB |
Output is correct |
| 15 |
Correct |
65 ms |
129400 KB |
Output is correct |
| 16 |
Correct |
66 ms |
129400 KB |
Output is correct |
| 17 |
Correct |
64 ms |
129400 KB |
Output is correct |
| 18 |
Correct |
66 ms |
129404 KB |
Output is correct |
| 19 |
Correct |
65 ms |
129400 KB |
Output is correct |
| 20 |
Correct |
64 ms |
129404 KB |
Output is correct |
| 21 |
Correct |
65 ms |
129400 KB |
Output is correct |
| 22 |
Correct |
64 ms |
129400 KB |
Output is correct |
| 23 |
Correct |
64 ms |
129400 KB |
Output is correct |
| 24 |
Correct |
64 ms |
129400 KB |
Output is correct |
| 25 |
Correct |
64 ms |
129400 KB |
Output is correct |
| 26 |
Correct |
66 ms |
129400 KB |
Output is correct |
| 27 |
Correct |
65 ms |
129400 KB |
Output is correct |
| 28 |
Correct |
65 ms |
129400 KB |
Output is correct |
| 29 |
Correct |
65 ms |
129400 KB |
Output is correct |
| 30 |
Correct |
65 ms |
129404 KB |
Output is correct |
| 31 |
Correct |
65 ms |
129400 KB |
Output is correct |
| 32 |
Correct |
66 ms |
129400 KB |
Output is correct |
| 33 |
Correct |
64 ms |
129400 KB |
Output is correct |
| 34 |
Correct |
66 ms |
129400 KB |
Output is correct |
| 35 |
Correct |
66 ms |
129400 KB |
Output is correct |
| 36 |
Correct |
91 ms |
129400 KB |
Output is correct |
| 37 |
Correct |
87 ms |
129400 KB |
Output is correct |
| 38 |
Correct |
71 ms |
129400 KB |
Output is correct |
| 39 |
Correct |
79 ms |
129400 KB |
Output is correct |
| 40 |
Correct |
82 ms |
129400 KB |
Output is correct |
| 41 |
Correct |
69 ms |
129400 KB |
Output is correct |
| 42 |
Correct |
67 ms |
129400 KB |
Output is correct |
| 43 |
Correct |
68 ms |
129400 KB |
Output is correct |
| 44 |
Correct |
66 ms |
129400 KB |
Output is correct |
| 45 |
Correct |
72 ms |
129528 KB |
Output is correct |
| 46 |
Correct |
67 ms |
129400 KB |
Output is correct |
| 47 |
Correct |
70 ms |
129400 KB |
Output is correct |
| 48 |
Correct |
68 ms |
129400 KB |
Output is correct |
| 49 |
Correct |
68 ms |
129400 KB |
Output is correct |
| 50 |
Correct |
66 ms |
129400 KB |
Output is correct |
| 51 |
Correct |
68 ms |
129432 KB |
Output is correct |
| 52 |
Correct |
66 ms |
129400 KB |
Output is correct |
| 53 |
Correct |
78 ms |
129400 KB |
Output is correct |
| 54 |
Correct |
66 ms |
129400 KB |
Output is correct |
| 55 |
Correct |
68 ms |
129404 KB |
Output is correct |
| 56 |
Correct |
66 ms |
129400 KB |
Output is correct |
| 57 |
Correct |
69 ms |
129400 KB |
Output is correct |
| 58 |
Correct |
67 ms |
129400 KB |
Output is correct |
| 59 |
Correct |
99 ms |
129400 KB |
Output is correct |
| 60 |
Correct |
84 ms |
129400 KB |
Output is correct |
| 61 |
Correct |
97 ms |
129400 KB |
Output is correct |
| 62 |
Correct |
82 ms |
129400 KB |
Output is correct |
| 63 |
Correct |
99 ms |
129400 KB |
Output is correct |
| 64 |
Correct |
82 ms |
129400 KB |
Output is correct |
| 65 |
Correct |
91 ms |
129400 KB |
Output is correct |
| 66 |
Correct |
90 ms |
129400 KB |
Output is correct |
| 67 |
Correct |
89 ms |
129400 KB |
Output is correct |
| 68 |
Correct |
89 ms |
129400 KB |
Output is correct |
| 69 |
Correct |
91 ms |
129400 KB |
Output is correct |
| 70 |
Correct |
90 ms |
129400 KB |
Output is correct |
| 71 |
Correct |
91 ms |
129400 KB |
Output is correct |
| 72 |
Correct |
90 ms |
129400 KB |
Output is correct |
| 73 |
Correct |
90 ms |
129400 KB |
Output is correct |
| 74 |
Correct |
85 ms |
129400 KB |
Output is correct |
| 75 |
Correct |
87 ms |
129400 KB |
Output is correct |
| 76 |
Correct |
97 ms |
129400 KB |
Output is correct |
| 77 |
Correct |
96 ms |
129400 KB |
Output is correct |
| 78 |
Correct |
85 ms |
129528 KB |
Output is correct |
| 79 |
Correct |
85 ms |
129400 KB |
Output is correct |
| 80 |
Correct |
93 ms |
129400 KB |
Output is correct |
| 81 |
Correct |
86 ms |
129528 KB |
Output is correct |
| 82 |
Correct |
89 ms |
129400 KB |
Output is correct |
| 83 |
Correct |
97 ms |
129400 KB |
Output is correct |
| 84 |
Correct |
88 ms |
129400 KB |
Output is correct |
| 85 |
Correct |
96 ms |
129400 KB |
Output is correct |
| 86 |
Correct |
94 ms |
129400 KB |
Output is correct |
| 87 |
Correct |
87 ms |
129400 KB |
Output is correct |
| 88 |
Correct |
97 ms |
129400 KB |
Output is correct |
| 89 |
Correct |
95 ms |
129404 KB |
Output is correct |
| 90 |
Correct |
89 ms |
129400 KB |
Output is correct |
| 91 |
Correct |
104 ms |
129400 KB |
Output is correct |
| 92 |
Correct |
98 ms |
129400 KB |
Output is correct |
| 93 |
Correct |
100 ms |
129400 KB |
Output is correct |
