Submission #4487964

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Source Code Expand

#include <iostream>
#include <algorithm>
#include <vector>
#include <math.h>
#include <stdio.h>
#include <functional>
#include <string>
#include <cstdlib>
#include <numeric>
#include <cstdbool>
#include <map> 
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 INF = 1LL << 60;

int main()
{
	int n;
	cin >> n;
	double res = 0;
	int x[110];
	int y[110];
	for (int i = 0;i < n;i++) {
		cin >> x[i] >> y[i];
	}
	for (int i = 0;i < n;i++) {
		for (int j = 0;j < n;j++) {
			double l=sqrt((x[i] - x[j])*(x[i] - x[j]) + (y[i] - y[j])*(y[i] - y[j]));
			if (l > res) {
				res = l;
			}
		}
	}
	cout << res << endl;
}

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