package MonthSep.HWday01;

/**
 * 遞迴演算法
 */
public class HW03 {
    // 階乘
    public int recursive(int i){
        int sum = 0;
        if(i == 0){
            return sum;
        }else {
            sum = i * recursive(i - 1);
        }
        return sum;
    }

    // 斐波那契數列
    public long Fib(int n){
        if
 
(n == 0){
            return 0;
        }
        if(n == 1){
            return 1;
        }
        if(n > 1){
            return Fib(n - 1) + Fib(n - 2);
        }
        return 0;
    }
    // 判定一系列字串中是否有相同的內容
    public boolean fun (int n, String[] a){
        boolean b = false;
        if(n == a.length){
            b = true
 
;
        }else {
            for(int i = n; i < a.length - 1; i++){
                System.out.println(n + " " + (i + 1));
                if(a[n].equals(a[i + 1])){
                    return false;
                }
            }
            n++;
            fun(n,a);
        }
        return b;
    }

    public
 
 static void main(String[] args) {
        String[] a = {"a1","a2","a3","b3","c","b","33","33"};
        boolean b = new HW03().fun(0, a);
        System.out.println(b);
    }
}