export {};

const maxAxis = 100000;
const [N, K]: [number, number] = require("fs").readFileSync(0, "utf8").toString().trim().split(' ').map(Number);
let queue: number[] = [];
let visited: number[] = new Array(maxAxis+1).fill(0);

queue.push(N);

while(queue.length){
    const now = queue.shift();
    if(now === K){
        console.log(visited[now]);
        break;
    }
    
    const nextAxis: number[] = [now-1, now+1, 2*now];
    for(let moveAxis of nextAxis){
        if(0<=moveAxis && moveAxis<=maxAxis && visited[moveAxis]===0){
            visited[moveAxis] = visited[now] + 1;
            queue.push(moveAxis);
        }
    }
}