Submission #374735

#	Time	Username	Problem	Language	Result	Execution time	Memory
374735		wzy	A Huge Tower (CEOI10_tower)	C++11	100 / 100	143 ms	13036 KiB

tower

#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());
	for(int i = 1; i <= n; i ++){
		while(v[i] > v[j] + d)
			j++;
		dp[i] = (dp[i-1] * ((ll) i-j+1))%mod;
	}
	printf("%lld\n" , dp[n]);
}

Compilation message (stderr)

tower.cpp: In function 'int32_t main()':
tower.cpp:10:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   10 |  scanf("%d%d" , &n , &d);
      |  ~~~~~^~~~~~~~~~~~~~~~~~
tower.cpp:15:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   15 |   scanf("%d" , &v[i]);
      |   ~~~~~^~~~~~~~~~~~~~

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