emer_chen的专栏

A small frog wants to get to the other side of a river. The frog is currently located at position 0, and wants to get to position X. Leaves fall from a tree onto the surface of the river. You are g

class Solution {     public int solution(int[] A) {         // write your code in Java SE 8         int size= A.length;         Boolean[] have = new Boolean[size];                  for(int i=0;i