Submission #884333

#	Time	Username	Problem	Language	Result	Execution time	Memory
884333		AndreiBOTO	A Huge Tower (CEOI10_tower)	C++14	100 / 100	235 ms	18012 KiB

tower

#include <iostream>
#include <vector>
#include <bits/stdc++.h>

using namespace std;

const int NMAX=1e6+5;
const int MOD=1e9+9;
#define int long long

vector<int>v;
int best[NMAX];

signed main()
{
    int n,d,i,j;
    long long ans=1;
    cin>>n>>d;
    for(i=0;i<n;i++)
    {
        int x;
        cin>>x;
        v.push_back(x);
    }
    sort(v.begin(),v.end());
    for(i=0;i<n;i++)
        best[i]=upper_bound(v.begin(),v.end(),v[i]+d)-v.begin();
    for(i=0;i<n;i++)
    {
        ans*=(1LL*best[i]-i);
        ans%=MOD;
    }
    cout<<ans;
    return 0;
}

Compilation message (stderr)

tower.cpp: In function 'int main()':
tower.cpp:16:15: warning: unused variable 'j' [-Wunused-variable]
   16 |     int n,d,i,j;
      |               ^

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