func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     cout.tie(NULL);     int n, a, b;     cin >> n >> a >> b;     if (a + b > n - 1 || a == n - 1 && n > 1)       cout << -1 << endl;     else {       if (n == 1)         cout << 1 << endl;       else {         cout << 1 <<    ;         n--;         int c;         n -= (a + b);         for (int i = 1; i <= b; i++) {           c = 1 << i;           cout << c <<    ;         }         while (n > 0) {           cout << c <<    ;           n--;         }         while (a > 0) {           c++;           cout << c <<    ;           a--;         }       }       cout << endl;     }     return 0;   }   