//khodaya khodet komak kon
#include <bits/stdc++.h>
#define F first
#define S second
#define pb push_back
#define all(x) x.begin(), x.end()
#pragma GCC optimise ("ofast")
#pragma GCC optimise("unroll-loops")
#define int long long
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
typedef vector<int> vi;
const int N = 100 + 10;
const ll MOD = 1000000000 + 7;
const ll INF = 1000000000000000000;
const ll LOG = 25;
int dp[N][1010][N][3], n, a[N], L;
int32_t main(){
ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
cin >> n >> L;
assert(n == 1);
for (int i = 1; i <= n; i++) cin >> a[i];
if (n == 2){
if (abs(a[1] - a[2]) <= L) return cout << 2, 0;
return cout << 0, 0;
}
if (n == 1){
if (L == 0) return cout << 1, 0;
return cout << 0, 0;
}
sort(a + 1, a + n + 1);
dp[1][0][0][1] = 2;
dp[1][0][0][2] = 1;
for (int i = 1; i < n; i++) for (int sm = 0; sm <= L; sm++) for (int cnt = 0; cnt <= i + 1; cnt++) for (int cor = 0; cor <= 2; cor++){
if (cnt + cor == 0) continue;
int delta = a[i + 1] - a[i];
int num = min(1009* 1ll, sm + (cnt * 2 + cor) * delta);
//if (dp[i][sm][cnt][cor] != 0) cout << num << '\n';
if (cnt != 0){
dp[i + 1][num][cnt - 1][cor] += (cnt * dp[i][sm][cnt][cor]) % MOD;
dp[i + 1][num][cnt - 1][cor] %= MOD;
dp[i + 1][num][cnt + 1][cor] += (cnt * dp[i][sm][cnt][cor]) % MOD;
dp[i + 1][num][cnt + 1][cor] %= MOD;
dp[i + 1][num][cnt][cor] += (cnt * 2 * dp[i][sm][cnt][cor]) % MOD;
dp[i + 1][num][cnt][cor] %= MOD;
}
if (cor != 0){
//cout << "YES" << endl;
dp[i + 1][num][cnt + 1][cor - 1] += cor * dp[i][sm][cnt][cor];
dp[i + 1][num][cnt + 1][cor - 1] %= MOD;
dp[i + 1][num][cnt + 1][cor] += cor * dp[i][sm][cnt][cor];
dp[i + 1][num][cnt + 1][cor] %= MOD;
dp[i + 1][num][cnt][cor - 1] += cor * dp[i][sm][cnt][cor];
dp[i + 1][num][cnt][cor - 1] %= MOD;
dp[i + 1][num][cnt][cor] += cor * dp[i][sm][cnt][cor];
dp[i + 1][num][cnt][cor] %= MOD;
}
}
ll ans = 0;
for (int i = 0; i <= L; i++) ans += dp[n][i][0][0], ans %= MOD;
cout << ans;
return 0;
}
Compilation message
skyscraper.cpp:8:0: warning: ignoring #pragma GCC optimise [-Wunknown-pragmas]
#pragma GCC optimise ("ofast")
skyscraper.cpp:9:0: warning: ignoring #pragma GCC optimise [-Wunknown-pragmas]
#pragma GCC optimise("unroll-loops")
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
5 ms |
376 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
19 ms |
504 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
5 ms |
376 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
