Submission #2572971

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Source Code Expand

#include<iostream>
#include<math.h>
using namespace std;
int main(void) {
	int N;
	double x[100], y[100];
	double x_len, y_len;
	double length = 0;
	cin >> N;
	for (int i=0; i < N; i++) {
		cin >> x[i] >> y[i];
	}

	for (int i = 0; i < N; i++) {
		if(i==0){
			x_len = pow(x[0] - x[N-1], 2);
			y_len = pow(y[0] - y[N-1], 2);
			if (sqrt(x_len + y_len) > length) {
				length = sqrt(x_len + y_len);
			}
		}
		else {
			x_len = pow(x[i] - x[i - 1], 2);
			y_len = pow(y[i] - y[i - 1], 2);
			if (sqrt(x_len + y_len) > length) {
				length = sqrt(x_len + y_len);
			}
		}
	}
	cout << length << endl;
	return 0;
}

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