#include <cstdio>
#include <cmath>
#include <iostream>
#include <vector>
using namespace std;

struct pt { int x, y; };

int main() {
	int n;
	cin >> n;
	vector<pt> p(n);
	for (pt &p : p) cin >> p.x >> p.y;

	double result = 0.0, cur;
	for (int i = 0; i < n; i++) {
		if (p[i].y == 0) continue;

		cur = 4; // 4 > pi
		for (int j = 0; j < i; j++)
			if (p[i].y > p[j].y) cur = min(cur, atan2(p[i].y - p[j].y, p[i].x - p[j].x));
		result = max(result, cur);

		cur = 4;
		for (int j = i; ++j < n; )
			if (p[i].y > p[j].y) cur = min(cur, atan2(p[i].y - p[j].y, p[j].x - p[i].x));
		result = max(result, cur);
	}

	printf("%.10f\n", result * 180.0 / acos(-1.0));
}