Submission #5208838

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Source Code Expand

#include<iostream>
#include<cstdio>
#include<algorithm>
#include<cmath>
#include<string>
#include<vector>
#include<list>
#include<set>
#include<map>
#include<queue>
#include<stack>
#include<cctype>
#include<climits>
#include<bitset>
#include<bits/stdc++.h>
#define ld long double
#define ll long long int
#define ull unsigned long long int
#define rep(i,n) for(i=0;i<n;i++)
#define fin(ans) cout<<(ans)<<endl
#define INF INT_MAX
#define vvi vector<vector<int> >
#define vvc vector<vector<char> >
#define vvs vector<vector<string> >
using namespace std;
template<class T> inline bool chmax(T& a,T b){if(a<b){a=b;return 1;}return 0;}
template<class T> inline bool chmin(T& a,T b){if(a>b){a=b;return 1;}return 0;}
const long long LLINF=1LL<<60;
//set<int>::iterator it;




int main(void){ios::sync_with_stdio(false);cin.tie(0);
//////////////////////////////////////////////////////
	
	int i,n,j;
	cin>>n;
	int a[n][2];
	double dis,longest=0.0;
	rep(i,n)cin>>a[i][0]>>a[i][1];
	rep(i,n){
		for(j=i+1;j<n;j++){
			dis=sqrt((a[i][0]-a[j][0])*(a[i][0]-a[j][0])+(a[i][1]-a[j][1])*(a[i][1]-a[j][1]));
			longest=max(longest,dis);
		}
	}
	printf("%.4f\n",longest);
	
	
	
//////////////////////////////////////////////////////
	return 0;
}

Submission Info

Judge Result