func_code_string: #include <bits/stdc++.h>   using namespace std;   const int N = 1e5 + 7;   const int xinc[] = {0, 0, 1, -1};   const int yinc[] = {1, -1, 0, 0};   const long double PI = acos(-1.0);   int n, k;   void solve() {     cin >> n >> k;     int d = n - k;     if (k == 1) {       cout << 1;       for (int i = 0; i < n - 1; i++) cout << 0;       cout <<   n ;       return;     }     d /= 2;     string p =  1 ;     for (int i = 0; i < d; i++) p +=  0 ;     int z = p.size();     for (int i = 0; i < n; i++) cout << p[i % z];     cout <<   n ;   }   signed main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     cout.tie(NULL);     int t;     t = 1;     while (t--) solve();     return 0;   }   