func_code_string: #include <bits/stdc++.h>   using namespace std;   int a[100005], vis[100005], b[100005], h[100005], g[100005];   int main() {     int n, m = 0;     cin >> n;     for (int i = 1; i <= n; i++) {       cin >> a[i];       if (a[i] == i) {         g[a[i]] = ++m;         h[m] = i;       }     }     for (int i = 1; i <= n; i++) {       if (!g[a[i]]) {         cout << -1;         return 0;       }     }     cout << m << endl;     for (int i = 1; i <= n; i++) {       cout << g[a[i]] <<    ;     }     cout << endl;     for (int i = 1; i <= m; i++) cout << h[i] <<    ;   }   