Submission #239098

#	Time	Username	Problem	Language	Result	Execution time	Memory
239098		T0p_	Pairs (IOI07_pairs)	C++14	30 / 100	41 ms	1664 KiB

pairs

#include<bits/stdc++.h>
using namespace std;

int arr[100100];

int main()
{
	int t, n, k, m;
	long long ans = 0;
	scanf(" %d %d %d %d",&t,&n,&k,&m);
	if(t == 1)
	{
		for(int i=1 ; i<=n ; i++)
			scanf(" %d",&arr[i]);
		sort(arr+1, arr+n+1);
		for(int i=1 ; i<=n ; i++)
		{
			int l = i, r = n;
			while(l != r)
			{
				int mid = (l+r+1)>>1;
				if(arr[mid] <= arr[i]+k) l = mid;
				else r = mid-1;
			}
			ans += l-i;
		}
		printf("%lld\n",ans);
		return 0;
	}
	return 0;
}

Compilation message (stderr)

pairs.cpp: In function 'int main()':
pairs.cpp:10:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf(" %d %d %d %d",&t,&n,&k,&m);
  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
pairs.cpp:14:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf(" %d",&arr[i]);
    ~~~~~^~~~~~~~~~~~~~~

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