Submission #22939

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Source Code Expand

#include <iostream>
#include <vector>
#include <cstdio>
#include <cmath>
using namespace std;
int main() {
	int N;
	cin >> N;
	vector<double> x(N), y(N);
	for (int i = 0; i < N; ++ i) {
		cin >> x[i] >> y[i];
	}
	double r = 0;
	for (int i = 0; i < N; ++ i) {
		for (int j = i+1; j < N; ++ j) {
			double dx = x[i]-x[j];
			double dy = y[i]-y[j];
			r = max(r, sqrt(dx*dx + dy*dy));
		}
	}
	printf("%f\n", r);
}

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