Submission #160757

#	Time	Username	Problem	Language	Result	Execution time	Memory
160757		luciocf	A Huge Tower (CEOI10_tower)	C++14	100 / 100	170 ms	8988 KiB

tower

#include <bits/stdc++.h>

using namespace std;

const int maxn = 1e6+10;
const int mod = 1e9+9;

int a[maxn];

int main(void)
{
	int n, d;
	scanf("%d %d", &n, &d);

	for (int i = 1; i <= n; i++)
		scanf("%d", &a[i]);

	sort(a+1, a+n+1);

	int ans = 1, ptr = 1;

	for (int i = 1; i <= n; i++)
	{
		while (ptr < i && a[ptr]+d < a[i])
			ptr++;

		ans = (1ll*ans*(i-ptr+1))%mod;
	}

	printf("%d\n", ans);
}

Compilation message (stderr)

tower.cpp: In function 'int main()':
tower.cpp:13:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d", &n, &d);
  ~~~~~^~~~~~~~~~~~~~~~~
tower.cpp:16:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &a[i]);
   ~~~~~^~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
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• Subtask 20: 5 / 5