func_code_string: #include <bits/stdc++.h>   using namespace std;   struct DSU {     long long int parent[500001], connected[500001];     void intialize(int x) {       for (long long int i = 1; i <= x; i++) {         parent[i] = i;         connected[i] = 1;       }     }     long long int getparent(long long int k) {       while (k != parent[k]) {         parent[k] = parent[parent[k]];         k = parent[k];       }       return k;     }     long long int getsize(long long int k) { return connected[getparent(k)]; }     void unionn(long long int u, long long int v) {       long long int parent1 = getparent(u), parent2 = getparent(v);       if (parent1 == parent2) return;       if (connected[parent1] > connected[parent2]) swap(parent1, parent2);       connected[parent2] += connected[parent1];       connected[parent1] = 0;       parent[parent1] = parent[parent2];     }   };   DSU dsu;   int main() {     long long int t;     cin >> t;     while (t--) {       long long int n;       cin >> n;       dsu.intialize(n + 1);       for (long long int i = 1; i <= n; i++) {         long long int x;         cin >> x;         dsu.unionn(i, x);       }       for (long long int i = 1; i <= n; i++) cout << dsu.getsize(i) <<    ;       cout <<   n ;     }   }   