class Solution {
public:
vector sortArrayByParity(vector& nums) {
int i = 0;
int j = nums.size() - 1;
int tmp;
while (i < j) {
if (nums[i] % 2 == 0 && nums[j] % 2 != 0) {
i++;
j--;
} else if (nums[i] % 2 == 0 && nums[j] % 2 == 0) {
i++;
} else if (nums[i] % 2 != 0 && nums[j] % 2 != 0) {
j--;
} else if (nums[i] % 2 != 0 && nums[j] % 2 == 0) {
tmp = nums[i];
nums[i] = nums[j];
nums[j] = tmp;
i++;
j--;
}
}
return nums;
}};
in the last else if wheter you increment i and decrement j or not your code is still accepted. I do not understand if we dont increment and decrement them how can we continue. some guy from youtube also doesnt increment or decrement that part. but it accepts anyways.
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