-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathBackTrace.java
More file actions
41 lines (32 loc) · 917 Bytes
/
Copy pathBackTrace.java
File metadata and controls
41 lines (32 loc) · 917 Bytes
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
/**
* 全排列，自我理解算法
*/
public class BackTrace{
private static boolean flag[];
public static void main(String[] args) {
int nums[] = {1, 3};
flag = new boolean[nums.length];
for (int i = 0; i < flag.length; i++) {
flag[i] = true;
}
int tmp[] = new int[nums.length];
backtracking(nums, 0, tmp);
}
private static void backtracking(int nums[], int start, int[] tmp) {
if (start >= nums.length) {
for (int k : tmp) {
System.out.print(k + "");
}
System.out.println();
return;
}
for (int i = 0; i < nums.length; i++) {
if (flag[i]) {
flag[i] = false;
tmp[i] = nums[start];
backtracking(nums, start+1, tmp);
flag[i] = true;
}
}
}
}