"use strict"

function main(input){
 const args = input.split(' ');
 const a = parseInt(args[0], 10);
 const b = parseInt(args[1], 10);

if (a>b){
let c = a*2-1
console.log(c);
}else{
let c = b*2-1
console.log(c);
}
  
}

main(require('fs').readFileSync('/dev/stdin', 'utf8'));