代码如下：

#include<bits/stdc++.h>
using namespace std;
int f(int x){
    
    if(x==1) return 1;
    else if(x%2) return f(3*x+1)+1;
    else return f(x/2)+1;
}
int main(){
    int n,m;
    while(scanf("%d%d",&n,&m)!=0){
        int maxn=0xc0c0c0c0;
        for(int i=min(n,m);i<=max(n,m);i++){
            maxn=max(maxn,f(i));
        }
        cout<<n<<" "<<m<<" "<<maxn<<"\n";
    }
    return 0;
}

“感觉”和题解没有什么区别，望过路的仙人指路