题解 | 好好好数组

// Created on 2026-03-20 10:34:21
#include<bits/stdc++.h>
using ll = long long;
using ull = unsigned long long;
using namespace std;

void solve() { 
  int n, m;
  cin >> n >> m;

  int ans = 0;
  if (m <= 3) ans += 1;
  if (m <= 2) ans += (n - 1);
  if (m <= 1) ans += 1;
  
  cout << ans << '\n';
}
  
int main() {
  ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
  
  int t = 1;
  cin >> t;
  
  while (t--) {
    solve();
  }
}