BOJ 14244 - 트리 만들기 [C++]

문제

링크

풀이

#include <iostream>
using namespace std;
 
void solve(void) {
  int n, m; cin >> n >> m;
 
  for (int i=1; i<=m; i++) cout << 0 << " " << i << "\n";
  for (int i=m; i<n-1; i++) cout << i << " " << i+1 << "\n";
}
 
int main(void) {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
 
  solve();
  return 0;
}