Submission #2177596

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Source Code Expand

#include<cstdio>
#include<algorithm>
#include<cmath>
#define sq(a) (a)*(a)
using namespace std;
const int INF=-1;
int N;
double ans=INF;
struct point{
	int x,y;
}a[101];
double dist(int m,int n)
{
	int x1=a[m].x,y1=a[m].y,
		x2=a[n].x,y2=a[n].y;
	return sqrt(sq(x1-x2)+sq(y1-y2));
}
int main()
{
	scanf("%d",&N);
	for(register int i=1;i<=N;i++)
	scanf("%d%d",&a[i].x,&a[i].y);
	for(register int i=1;i<=N;i++)
	{
		for(register int j=1;j<=N;j++)
		{
			if(i==j) continue;
			else ans=max(ans,dist(i,j));
		}
	}
	printf("%.14f",ans);
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:20:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&N);
                ^
./Main.cpp:22:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&a[i].x,&a[i].y);
                               ^

Judge Result