Monday, 4 October 2021

Move Zeros

Given an array nums, write a function to move all 0's to the end of it while maintaining the relative order of the non-zero elements.
For example, given nums = [0, 1, 0, 3, 12], after calling your function, nums should be [1, 3, 12, 0, 0].
Note:
  1. You must do this in-place without making a copy of the array.
  2. Minimize the total number of operations.


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void moveZeroes(int* nums, int numsSize){
    int i = 0, j = 0;
    for(i = 0; i < numsSize; i++){
        //copy non-zero elements
        if(nums[i] != 0){
            nums[j] = nums[i];
            j++;
        }
    }
    //put zeros in the end
    while(j < numsSize){
        nums[j++] = 0;
    }
}
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