IsSubsequence::isSubsequence() - Code Metrics - imajinyun/leetcode-php - Measure and Improve Code Quality continuously with Scrutinizer

↳ Parent: IsSubsequence

Conditions	6
Paths	4

Total Lines	14
Code Lines	8

Lines	0
Ratio	0 %

Changes	2
Bugs	0	Features	0

1			<?php
2
3			declare(strict_types=1);
4
5			namespace leetcode;
6
7			class IsSubsequence
8			{
9			public static function isSubsequence(string $s, string $t): bool
10			{
11			[$m, $n, $i, $j] = [strlen($s), strlen($t), 0, 0];
12			if ($m < 0 \|\| $n < 0) {
13			return false;
14			}
15			while ($i < $m && $j < $n) {
16			if ($s[$i] === $t[$j]) {
17			$i++;
18			}
19			$j++;
20			}
21
22			return $i === $m;
23			}
24
25			public static function isSubsequence2(string $s, string $t): bool
26			{
27			[$m, $n] = [strlen($s), strlen($t)];
28			if ($m < 0 \|\| $n < 0) {
29			return false;
30			}
31
32			$dp = array_fill(0, $m + 1, array_fill(0, $n + 1, false));
33			$dp[0][0] = true;
34			for ($i = 1; $i <= $m; $i++) {
35			$dp[$i][0] = false;
36			}
37			for ($j = 1; $j <= $n; $j++) {
38			$dp[0][$j] = true;
39			}
40
41			for ($i = 1; $i <= $m; $i++) {
42			for ($j = 1; $j <= $n; $j++) {
43			if ($s[$i - 1] === $t[$j - 1]) {
44			$dp[$i][$j] = $dp[$i - 1][$j - 1];
45			} else {
46			$dp[$i][$j] = $dp[$i][$j - 1];
47			}
48			}
49			}
50
51			return $dp[$m][$n];
52			}
53			}
54

imajinyun / leetcode-php