Java程序将所有零移动到数组末尾| Set-2(使用单次遍历)
给定一个包含n 个数字的数组。问题是将所有 0 移动到数组的末尾,同时保持其他元素的顺序。只需要对数组进行一次遍历。
例子:
Input : arr[] = {1, 2, 0, 0, 0, 3, 6}
Output : 1 2 3 6 0 0 0
Input: arr[] = {0, 1, 9, 8, 4, 0, 0, 2, 7, 0, 6, 0, 9}
Output: 1 9 8 4 2 7 6 9 0 0 0 0 0
算法:
moveZerosToEnd(arr, n)
Initialize count = 0
for i = 0 to n-1
if (arr[i] != 0) then
swap(arr[count++], arr[i])
Java
// Java implementation to move
// all zeroes at the end of array
import java.io.*;
class GFG {
// function to move all zeroes at
// the end of array
static void moveZerosToEnd(int arr[], int n) {
// Count of non-zero elements
int count = 0;
int temp;
// Traverse the array. If arr[i] is
// non-zero, then swap the element at
// index 'count' with the element at
// index 'i'
for (int i = 0; i < n; i++) {
if ((arr[i] != 0)) {
temp = arr[count];
arr[count] = arr[i];
arr[i] = temp;
count = count + 1;
}
}
}
// function to print the array elements
static void printArray(int arr[], int n) {
for (int i = 0; i < n; i++)
System.out.print(arr[i] + " ");
}
// Driver program to test above
public static void main(String args[]) {
int arr[] = {0, 1, 9, 8, 4, 0, 0, 2,
7, 0, 6, 0, 9};
int n = arr.length;
System.out.print("Original array: ");
printArray(arr, n);
moveZerosToEnd(arr, n);
System.out.print("
Modified array: ");
printArray(arr, n);
}
}
// This code is contributed by Nikita Tiwari.
输出:
Original array: 0 1 9 8 4 0 0 2 7 0 6 0 9
Modified array: 1 9 8 4 2 7 6 9 0 0 0 0 0
时间复杂度:O(n)。
辅助空间:O(1)。
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