#include <bits/stdc++.h>   using namespace std;   signed main() {     ios_base::sync_with_stdio(false);     cin.tie(0);     cout.tie(0);     long long t;     cin >> t;     while (t--) {       long long a, b, c, i, j;       cin >> a >> b >> c;       string f, s, third;       if (a) {         s = string(a + 1,  0 );       }       if (c) {         f = string(c + 1,  1 );       }       if (b) {         bool flag;         if (a == 0 && c) {           flag = true;           for (i = 0; i < b; i++) {             if (flag) {               third +=  0 ;               flag = false;             } else {               third +=  1 ;               flag = true;             }           }           cout << f << third << endl;           continue;         }         if (c) {           b--;         }         flag = true;         for (i = 0; i < b; i++) {           if (flag) {             third +=  1 ;             flag = false;           } else {             third +=  0 ;             flag = true;           }         }         if (a == 0 && c == 0) {           if (b & 1)             third +=  0 ;           else             third +=  1 ;         }       }       cout << f << s << third << endl;     }     return 0;   }   