func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int t;     cin >> t;     while (t--) {       int n, t;       cin >> n >> t;       vector<int> arr(n);       for (int i = 0; i < n; i++) {         cin >> arr[i];         if (arr[i] == 0 || arr[i] == t) continue;         arr[i] %= t;       }       set<int> s;       set<int>::iterator it;       bool selected = false;       vector<int> color(n);       for (int i = 0; i < n; i++) {         if (t % 2 == 0 && arr[i] == t / 2) {           color[i] = selected;           selected = !selected;         } else {           int opp = t - arr[i];           if (s.find(opp) == s.end()) {             color[i] = 0;             s.insert(arr[i]);           } else {             color[i] = 1;           }         }       }       for (int i = 0; i < n; i++) cout << color[i] <<    ;       cout <<   n ;     }   }   