#!/usr/bin/env python
# coding: utf-8

def main():
    a, b, c = [int(i) for i in raw_input().split()]
    if a + b == c:
        print 'Yes'
    elif b + c == a:
        print 'Yes'
    elif c + a == b:
        print 'Yes'
    else:
        print 'No'

if __name__ == '__main__':
    main()
