题目：

题解：

int* singleNumber(int* nums, int numsSize, int* returnSize) {int xorsum = 0;for (int i = 0; i < numsSize; i++) {xorsum ^= nums[i];}// 防止溢出int lsb = (xorsum == INT_MIN ? xorsum : xorsum & (-xorsum));int type1 = 0, type2 = 0;for (int i = 0; i < numsSize; i++) {int num = nums[i];if (num & lsb) {type1 ^= num;} else {type2 ^= num;}}int *ans = (int *)malloc(sizeof(int) * 2);ans[0] = type1;ans[1] = type2;*returnSize = 2;return ans;
}