# | Time | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
374734 | wzy | A Huge Tower (CEOI10_tower) | C++11 | 134 ms | 13676 KiB |
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>
using namespace std;
typedef long long ll;
const ll mod = (ll) 1e9 + 9;
int32_t main(){
int n , d , j = 1;
scanf("%d%d" , &n , &d);
vector<int> v(n+1);
vector<long long> dp(n+1);
dp[0] = 1;
for(int i = 1; i <= n; i ++){
scanf("%d" , &v[i]);
}
sort(v.begin() + 1 , v.end());
dp[1] = 1;
for(int i = 2; i <= n; i ++){
while(v[i] > v[j] + d)
j++;
dp[i] = dp[i-1] * (i-j+1);
}
printf("%lld\n" , dp[n]);
}
Compilation message (stderr)
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