#!/usr/bin/env python3

n = int(input())
x = None
been = [False] * 360
for i in range(n):
    t, l = map(int, input().split())
    l = l % 360
    if x is None:
        x = l
        continue
    d = (l - x) % 360
    if d == 180:
        print("yes")
        exit(0)
    print(x, l, d)
    if d < 180:
        while x != l:
            been[x] = True
            print(x)
            x += 1
            x %= 360
    if d > 180:
        while x != l:
            x -= 1
            x %= 360
            been[x] = True
            print(x)

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