# https://yukicoder.me/problems/no/3595

import math

def main():
    N = int(input())
    h, w = map(int, input().split())

    if h == 1 or w == 1:
        print("Yes")
    elif h - w == 0:
        print("Yes")
    else:
        print("No")









if __name__ == "__main__":
    main()