func_code_string: #include <bits/stdc++.h>   using namespace std;   const int N = 1e8 + 5;   long long MAX = 1e9;   long long MOD = 1e9 + 7;   long long Mod = 1e9 + 7;   double EPS = 0.0001;   long long gcd(long long a, long long b) { return (b == 0 ? a : gcd(b, a % b)); }   long long lcm(long long a, long long b) { return ((a * b) / gcd(a, b)); }   const int dx[] = {1, -1, 0, 0, 0, 0};   const int dy[] = {0, 0, 1, -1, 0, 0};   int main() {     int wait;     long long n, k;     int prin = 0;     scanf( %I64d , &n);     scanf( %I64d , &k);     long long check = k * (k - 1);     if (check < n) {       cout <<  NO n ;       return 0;     }     cout <<  YES n ;     for (long long i = 1; i < k + 1; i++) {       for (long long j = i + 1; j < k + 1; j++) {         cout << i <<     << j << endl;         prin++;         if (prin == n) return 0;         cout << j <<     << i << endl;         prin++;         if (prin == n) return 0;       }     }     return 0;   }   