func_code_string: #include <bits/stdc++.h>   using namespace std;   void PT(long long a);   void PT1(long long a);   const long long M = 2 * (1e5) + 7;   long long a[M];   signed main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     cout.tie(NULL);     ;     {       long long n, k;       cin >> n >> k;       if (k * (k - 1) < n)         return cout <<  NO                      <<   n ,                0;       cout <<  YES             <<   n ;       vector<pair<long long, long long>> v;       long long i = 1, j = 2;       while (v.size() < n) {         if (v.size() == 0) {           v.push_back({i, j});           v.push_back({j, i});         } else if ((v.back()).first == i || (v.back()).second == j) {           v.push_back({j, i});           v.push_back({i, j});         } else {           v.push_back({i, j});           v.push_back({j, i});         }         if (j == k) {           i++;           j = i + 1;         } else           j++;       }       for (long long i = 0; i < n; i++) {         cout << v[i].first <<     << v[i].second <<   n ;       }     }     return 0;   }   void PT(long long a) { cout << a <<   n ; }   void PT1(long long a) { cout << a <<    ; }   