func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios_base::sync_with_stdio(0);     cin.tie(0);     int t;     cin >> t;     while (t--) {       int n;       cin >> n;       int l = 2, h = 1e5;       int ans = 2;       while (l <= h) {         int m = l + (h - l) / 2;         if ((long long)m * (m - 1) / 2 <= n) {           ans = m;           l = m + 1;         } else {           h = m - 1;         }       }       int rem = n - (long long)ans * (ans - 1) / 2;       cout <<  133 ;       for (int i = 1; i <= rem; i++) cout << 7;       for (int i = 1; i <= ans - 2; i++) cout << 3;       cout << 7 <<   n ;     }   }   