#include <bits/stdc++.h>
#define x first
#define y second
using ll = long long;
using namespace std;
int main() {
int n, L;
cin >> n >> L;
vector<pair<int, int>> a(n + 2);
a[0] = {0, INT64_MAX};
a[n + 1] = {L, INT64_MAX};
for (int i = 1; i <= n; i++) {
cin >> a[i].x;
}
for (int i = 1; i <= n; i++) {
cin >> a[i].y;
}
n += 2;
vector<vector<vector<ll>>> dp(n, vector<vector<ll>>(n, vector<ll>(n, INT64_MAX / 2)));
dp[0][n - 1][0] = 0;
for (int l = n - 1; l > 0; l--) {
for (int i = 0; i + l < n; i++) {
int j = i + l;
for (int s = 0; s < n; s++) {
ll dist1 = a[i + 1].x - a[i].x, dist2 = a[i].x + L - a[j - 1].x;
if (dp[i][j][s] + dist1 <= a[i + 1].y) {
dp[i + 1][j][s + 1] = min(dp[i + 1][j][s + 1], dp[i][j][s] + dist1);
} else {
dp[i + 1][j][s] = min(dp[i + 1][j][s], dp[i][j][s] + dist1);
}
if (dp[i][j][s] + dist2 <= a[j - 1].y) {
dp[j - 1][i][s + 1] = min(dp[j - 1][i][s + 1], dp[i][j][s] + dist2);
} else {
dp[j - 1][i][s] = min(dp[j - 1][i][s], dp[i][j][s] + dist2);
}
}
}
for (int i = l; i < n; i++) {
int j = i - l;
for (int s = 0; s < n; s++) {
ll dist1 = a[i].x - a[i - 1].x, dist2 = L - a[i].x + a[j + 1].x;
if (dp[i][j][s] + dist1 <= a[i - 1].y) {
dp[i - 1][j][s + 1] = min(dp[i - 1][j][s + 1], dp[i][j][s] + dist1);
} else {
dp[i - 1][j][s] = min(dp[i - 1][j][s], dp[i][j][s] + dist1);
}
if (dp[i][j][s] + dist2 <= a[j + 1].y) {
dp[j + 1][i][s + 1] = min(dp[j + 1][i][s + 1], dp[i][j][s] + dist2);
} else {
dp[j + 1][i][s] = min(dp[j + 1][i][s], dp[i][j][s] + dist2);
}
}
}
}
for (int s = n - 1; s >= 0; s--) {
for (int i = 0; i < n; i++) {
for (int j = 0; j < n; j++) {
if (dp[i][j][s] < INT64_MAX / 2) {
cout << s << '\n';
return 0;
}
}
}
}
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
600 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
0 ms |
348 KB |
Output is correct |
| 7 |
Correct |
0 ms |
436 KB |
Output is correct |
| 8 |
Correct |
1 ms |
348 KB |
Output is correct |
| 9 |
Correct |
1 ms |
348 KB |
Output is correct |
| 10 |
Correct |
1 ms |
348 KB |
Output is correct |
| 11 |
Correct |
0 ms |
348 KB |
Output is correct |
| 12 |
Correct |
0 ms |
348 KB |
Output is correct |
| 13 |
Correct |
0 ms |
348 KB |
Output is correct |
| 14 |
Correct |
0 ms |
436 KB |
Output is correct |
| 15 |
Correct |
0 ms |
348 KB |
Output is correct |
| 16 |
Incorrect |
1 ms |
348 KB |
Output isn't correct |
| 17 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
600 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
0 ms |
348 KB |
Output is correct |
| 7 |
Correct |
0 ms |
436 KB |
Output is correct |
| 8 |
Correct |
1 ms |
348 KB |
Output is correct |
| 9 |
Correct |
1 ms |
348 KB |
Output is correct |
| 10 |
Correct |
1 ms |
348 KB |
Output is correct |
| 11 |
Correct |
0 ms |
348 KB |
Output is correct |
| 12 |
Correct |
0 ms |
348 KB |
Output is correct |
| 13 |
Correct |
0 ms |
348 KB |
Output is correct |
| 14 |
Correct |
0 ms |
436 KB |
Output is correct |
| 15 |
Correct |
0 ms |
348 KB |
Output is correct |
| 16 |
Incorrect |
1 ms |
348 KB |
Output isn't correct |
| 17 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
600 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
0 ms |
348 KB |
Output is correct |
| 7 |
Correct |
0 ms |
436 KB |
Output is correct |
| 8 |
Correct |
1 ms |
348 KB |
Output is correct |
| 9 |
Correct |
1 ms |
348 KB |
Output is correct |
| 10 |
Correct |
1 ms |
348 KB |
Output is correct |
| 11 |
Correct |
0 ms |
348 KB |
Output is correct |
| 12 |
Correct |
0 ms |
348 KB |
Output is correct |
| 13 |
Correct |
0 ms |
348 KB |
Output is correct |
| 14 |
Correct |
0 ms |
436 KB |
Output is correct |
| 15 |
Correct |
0 ms |
348 KB |
Output is correct |
| 16 |
Incorrect |
1 ms |
348 KB |
Output isn't correct |
| 17 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
600 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
0 ms |
348 KB |
Output is correct |
| 7 |
Correct |
0 ms |
436 KB |
Output is correct |
| 8 |
Correct |
1 ms |
348 KB |
Output is correct |
| 9 |
Correct |
1 ms |
348 KB |
Output is correct |
| 10 |
Correct |
1 ms |
348 KB |
Output is correct |
| 11 |
Correct |
0 ms |
348 KB |
Output is correct |
| 12 |
Correct |
0 ms |
348 KB |
Output is correct |
| 13 |
Correct |
0 ms |
348 KB |
Output is correct |
| 14 |
Correct |
0 ms |
436 KB |
Output is correct |
| 15 |
Correct |
0 ms |
348 KB |
Output is correct |
| 16 |
Incorrect |
1 ms |
348 KB |
Output isn't correct |
| 17 |
Halted |
0 ms |
0 KB |
- |
