题目

题目不难，很容易找到思路，比较坑的是找循环节。（一个小技巧，给的Example1中有七个数据，从这个数字开始到双倍、三倍）一般题目不会无端给这么多测试数据的

代码部分一（12ms 85.61%）

class Solution {public int[] prisonAfterNDays(int[] cells, int N) {if(N <= 0) return cells;if(N%14 == 0){N = 14;}else {N = N%14;}while(N > 0){int[] res = new int[8];res[0] = 0;res[7] = 0;for(int i = 1; i < 7; i++){res[i] = (cells[i-1] ^ cells[i+1]) ^ 1;}cells = res;N--;}return cells;}
}

代码部分二（11ms 100%）

class Solution {public int[] prisonAfterNDays(int[] cells, int N) {if(N = 0) return cells;if(N%14 == 0){N = 14;}else {N = N%14;}while(N  0){int[] res = new int[8];res[0] = 0;res[7] = 0;for(int i = 1; i  7; i++){if(cells[i-1] == cells[i+1]) res[i] = 1;else res[i] = 0;}cells = res;N--;}return cells;}
}