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

int main(){
	int t,n;	cin >> t;
	while(t--){
		cin >> n;
		if(n == 2)	cout << "1\n";
		else if(n == 3)	cout << "7\n";
		else{
			map<int,int> mp = {{2,1},{3,7},{4,4},{5,5},{6,9},{7,8}};
			
			int dcount = n/2;
			string ans = "";
			for(int i=0;i<dcount-1;++i){
				ans = "1" + ans;
				n -= 2;
			}
			cout << mp[n] << ans << endl;
		}
	}
}