代码：

#include<bits/stdc++.h>
using namespace std;
long long t;

int main(){
	cin>>t;
	while(t--){
		long long l,r,x=0,j;
		cin>>l>>r;
		if(l>=90||r>=90){
			cout<<90<<endl;
			continue;
		}for(int i=l;i<=r;i++){
			long long m=i,maxx=-1,minn=11451411;
			while(m!=0){
				long long y=m%10;
				cout<<y<<" ";
				maxx=max(maxx,y);
				minn=min(minn,y);
				cout<<maxx<<" "<<minn<<" ";
				cout<<m<<endl;
			}if(maxx-minn>x){
				x=maxx-minn,j=i;
			}
		}
		cout<<j<<endl;
	}
	return 0;
}

来个神犇帮帮我这个蒟蒻把