#include <bits/stdc++.h>   using namespace std;   int main() {     ios_base::sync_with_stdio(false);     int n, k;     while (cin >> n >> k) {       int r = n, l = 1;       cout << l;       l++;       for (int i = 1; i < k; i++)         if (i % 2) {           cout <<     << r;           r--;         } else {           cout <<     << l;           l++;         }       if (k % 2)         for (int i = k; i < n; i++, l++) cout <<     << l;       else         for (int i = k; i < n; i++, r--) cout <<     << r;       cout << endl;     }   }   