#!/usr/bin/env python3

def solve(a: int, b: int) -> int:
    if a < b:
        a, b = b, a
    assert a >= b
    return 2 * b - 1 + (a > b)

# generated by online-judge-template-generator v4.1.0 (https://github.com/kmyk/online-judge-template-generator)
def main():
    A, B = map(int, input().split())
    ans = solve(A, B)
    print(ans)

if __name__ == '__main__':
    main()