This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
#define MOD 1000000007
using namespace std;
long long N, L, a[200], dp[150][150][1200][5], x;
int main() {
ios::sync_with_stdio(false); cin.tie(0); cout.tie(0);
cin>>N>>L;
for(int i=1; i<=N; i++) cin>>a[i];
sort(a+1, a+N+1);
dp[0][0][0][0]=1;
for(int i=1; i<=N; i++) {
for(int j=1; j<=N; j++) {
for(int s=0; s<=L; s++) {
x=2*j*(a[i+1]-a[i]);
if(s-x>=0) {
dp[i][j][s][0]+=j*dp[i-1][j-1][s-x][0]+2*j*dp[i-1][j][s-x][0]+j*dp[i-1][j+1][s-x][0];
}
x=(2*j-1)*(a[i+1]-a[i]);
if(s-x>=0) {
dp[i][j][s][1]+=(j-1)*dp[i-1][j-1][s-x][1]+(2*j-1)*dp[i-1][j][s-x][1]+j*dp[i-1][j+1][s-x][1];
dp[i][j][s][1]+=2*dp[i-1][j-1][s-x][0]+2*dp[i-1][j][s-x][0];
}
x=(2*j-2)*(a[i+1]-a[i]);
if(s-x>=0) {
dp[i][j][s][2]+=max(0, (j-2))*dp[i-1][j-1][s-x][2]+(2*j-2)*dp[i-1][j][s-x][2]+j*dp[i-1][j+1][s-x][2];
dp[i][j][s][2]+=dp[i-1][j-1][s-x][1]+dp[i-1][j][s-x][1];
}
for(int k=0; k<=2; k++) dp[i][j][s][k]%=MOD;
}
}
}
long long rez=0;
for(int i=0; i<=L; i++) rez+=dp[N][1][i][2];
cout<<rez;
return 0;
}
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |