src/main/java/com/fishercoder/solutions/_1688.java

package com.fishercoder.solutions;

public class _1688 {
    public static class Solution1 {
        public int numberOfMatches(int n) {
            int matches = 0;
            while (n > 1) {
                if (n % 2 == 0) {
                    matches += n / 2;
                    n /= 2;
                } else {
                    matches += (n - 1) / 2;
                    n = (n + 1) / 2;
                }
            }
            return matches;
        }
    }
}