#!/usr/bin/env python3

def main():
    x, y = map(int, input().split())
    if x == y:
       print(x + y)
       return
    if x < y:
        x, y = y, x
    rest = x - (y + 1)
    print(y * 2 + 1 + rest * 2)
    return

if __name__ == '__main__':
    main()