448. 找到所有数组中消失的数字https://leetcode-cn.com/problems/find-all-numbers-disappeared-in-an-array/https://leetcode-cn.com/problems/find-all-numbers-disappeared-in-an-array/
代码：哈希表的简单运用
int* findDisappearedNumbers(int* nums, int numsSize, int* returnSize){
int *ans=(int *)malloc(sizeof(int)*numsSize);
int num[100001];
memset(num,0,sizeof(num));
for(int i=0;i
