leetcode4:Median of Two Sorted Arrays
本质上就是一个有序数组合并，然后求中位数，不用细讲，直接给代码!
package _20171021;public class Main {public static void main(String[] args) {int[] array1 = {1,26,39,42,52};int [] array2 = {10,23,45,65,89};System.out.println(mediaValue(array1, array2));}public static double mediaValue(int[] a1, int[] a2) {int len1 = a1.length;int len2 = a2.length;int len = len1 + len2;int[] all = new int[len];int l = 0; //标记a1当前位置 int m = 0; //标记a2当前位置int n = 0; //标记总的当前位置while(l < len1 && m < len2) { //有序数组合并if(a1[l] < a2[m]) {all[n] = a1[l];n++;l++;}else {all[n] = a2[m];n++;m++;}}while(l < len1) {all[n] = a1[l];n++;l++;}while(m < len2) {all[n] = a2[m];n++;m++;}int mid = 0;if((len & 1) != 0) { //奇数mid = len / 2;return all[mid] * 1.0;}else { //偶数mid = len / 2;return (all[mid-1] + all[mid]) * 1.0 / 2;}}
}
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