-
Notifications
You must be signed in to change notification settings - Fork 1
/
solution.go
42 lines (33 loc) · 853 Bytes
/
solution.go
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
42
package s0079_word_search
// #Medium #Top_100_Liked_Questions #Top_Interview_Questions #Array #Matrix #Backtracking
// #Algorithm_II_Day_11_Recursion_Backtracking #Big_O_Time_O(4^(m*n))_Space_O(m*n)
// #2024_03_15_Time_103_ms_(79.70%)_Space_2_MB_(58.16%)
func exist(board [][]byte, word string) bool {
var run func(i, j, k int) bool
run = func(i, j, k int) bool {
if i < 0 || i == len(board) || j < 0 || j == len(board[0]) {
return false
}
if board[i][j] != word[k] {
return false
}
if k == len(word)-1 {
return true
}
board[i][j] = ' '
results := run(i+1, j, k+1) ||
run(i-1, j, k+1) ||
run(i, j+1, k+1) ||
run(i, j-1, k+1)
board[i][j] = word[k]
return results
}
for i := 0; i < len(board); i++ {
for j := 0; j < len(board[0]); j++ {
if run(i, j, 0) {
return true
}
}
}
return false
}