Revise paste Untitled

#include <iostream>
//#include <bits/stdc++.h>
#include <vector>
#include <map>
using namespace std;
typedef long long ll;
map<ll, int> A;
void simulate(ll x) {
    int cnt = 0;
    A[x] = cnt;
    while(x != 1) {
        cnt++;
        if(x % 2 == 0) {
            x /= 2;
        }
        else {
            x *= 3;
            x++;
        }
        if(!A.count(x)) {
            A[x] = cnt;
        }
    }
}
int main() {
    ll a, b;
    while(cin >> a >> b) {
        A.clear();
        
        if(a == 0 and b == 0) {
            break;
        }
        
        simulate(a);
        ll tmp = b;
        int cnt = 0;
        while(true) {
            
            if(A.count(b)) {
                break;
            }
            if(b % 2 == 0) {
                b /= 2;
            }
            else {
                b *= 3;
                b++;
            }
            cnt++;
        }
        cout << a << " needs " << A[b] << " steps, " << tmp << " needs " << cnt << " steps, they meet at " << b << endl;
    
    }
    
    return 0;
}
/*
 7 needs 13 steps, 8 needs 0 steps, they meet at 8
 27 needs 95 steps, 30 needs 2 steps, they meet at 46
 **/