题解

#include<bits/stdc++.h>
using namespace std;
int main(){
    int n;
    cin>>n;
    if(n==0) cout<<"____";
    else if(n==1) cout<<"#___";
    else if(n==2) cout<<"##__";
    else if(n==3) cout<<"###_";
    else cout<<"####";
    return 0;
}