#!/usr/bin/env python3

n = int(input())
ls = [int(input().split()[1]) for _ in range(n)]
x = ls[-1]
been = [False] * 360
w = 0
for l in ls:
    l = l % 360
    d = (l - x) % 360
    w += (d + 180) % 360 - 180
    if d == 180:
        print("yes")
        exit(0)
    if d < 180:
        while x != l:
            been[x] = True
            x += 1
            x %= 360
    if d > 180:
        while x != l:
            x -= 1
            x %= 360
            been[x] = True

ans = all(been)

if w != 0:
    print("yes")
else:
    for i, b in enumerate(been):
        if not b:
            print("no", (i + 0.5 + 180) % 360 - 180)
            exit(0)

    # This will always WA. Could also assert(False) here.
    print(0)