function main(input) {
   input = input.trim();
  const a = input.split(" ").map(Number);
	console.log(a[0]==a[1]?a[0]*2
			   :a[0]>a[1]?a[0]+a[0]-1
				:a[1]+a[1]-1);
}
main(require('fs').readFileSync('/dev/stdin', 'utf8'));