题解 | 选数

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int T = scanner.nextInt();
        while (T-- > 0) {
            long n = scanner.nextLong();
            long k = scanner.nextLong();
            long groups = Math.min(k, n - k + 1);
            System.out.println(groups);
        }
    }
}