Submission #5147917

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Source Code Expand

#include <cmath>
#include <cstring>
#include <cstdio>
#include <algorithm>

using namespace std;

int a[101];
int b[101];

inline int read(){
	int AK=1,IOI=0;
	char ch=0;
	while (ch<'0'||ch>'9'){
		AK=ch=='-'?-1:1;
		ch=getchar();
	}	
	while (ch<='9'&&ch>='0'){
		IOI*=10;
		IOI+=ch-48;
		ch=getchar();
	}
	return AK*IOI;
}

inline double max(double x,double y){
	return x>y?x:y;
}
inline double sqr(int x){
	return x*x;
}
int main(){
	int n=read();
	for (int i=1;i<=n;i++){
		a[i]=read();
		b[i]=read();
	}
	double answer=0;
	for (int i=1;i<=n;i++){
		for (int j=1;j<=n;j++){
			answer=max(answer,sqrt(sqr(a[i]-a[j])+sqr(b[i]-b[j])));
		}
	}
	printf("%0.6lf\n",answer);
}

Submission Info

Judge Result