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:
You must do this in-place without making a copy of the array.
Minimize the total number of operations.
第一种解法:(24ms)
public void moveZeroes(int[] nums) {
int n = nums.length;
//用来后面减去移动次数的计数
int num = n;
int i = 0;
while (i < num) {
if (nums[i] == 0) {
for (int a = i; a < n - 1; a++) {
nums[a] = nums[a + 1];
}
nums[n - 1] = 0;
num--;
} else {
i++;
}
}
}
第一种解法:(87ms)
public void moveZeroes(int[] nums) {
int count = 0;
int pos = 0;
int[] b = new int[nums.length];
for (int i = 0; i < nums.length; i++) {
if (nums[i] != 0) {
b[count] = nums[i];
count++;
}
}
for (int i = 0; i < nums.length; i++) {
nums[pos] = b[i];
pos++;
}
for (int i = 0; i < nums.length; i++) {
System.out.print(nums[i] + " ");
}
}