func_code_string: #include <bits/stdc++.h>   using namespace std;   const int maxn = 1e5 + 5;   int n, m, k;   int main() {     cin >> n >> m >> k;     cout << m * (m - 1) / 2 << endl;     for (int i = 1; i <= m; i++) {       for (int j = i + 1; j <= m; j++) {         if (k)           cout << j <<     << i << endl;         else           cout << i <<     << j << endl;       }     }     return 0;   }   