@[LoTLaneyyat](/user/910962)
```
#include<bits/stdc++.h>
using namespace std;
typedef pair<int,int> P;
queue<P> q;
P p;
int main(){
int t, a, b;
cin >> t;
while( t -- ){
cin >> a >> p.first;
b = 1000000;
q.push( P(p.first,0) );
while( q.size() ){
p = q.front();
q.pop();
if( p.first < a ){
p.second += a - p.first;
if( b > p.second ) b = p.second;
}else if( p.first % 2 == 0 ){
if( p.first / 2 > a )//是大于a!!
q.push( P(p.first/2,p.second+1) );
else if( p.first - a > a - p.first/2 )
q.push( P(p.first/2,p.second+1) );
else{
p.second += p.first - a;
if( b> p.second ) b = p.second;
}
}else{
q.push( P(p.first+1,p.second+1) );
q.push( P(p.first-1,p.second+1) );
}
}
cout << b << endl;
}
return 0;
}
```
by yzyhaoshuai @ 2023-11-10 22:25:17
判断有问题，就自然出错了
by yzyhaoshuai @ 2023-11-10 22:27:13
**~~我是大佬~~**
by yzyhaoshuai @ 2023-11-12 14:49:18