44. Wildcard Matching

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class Solution {
public boolean isMatch(String s, String p) {
int m = s.length(), n = p.length();

// 定义 dp[i][j] 为 s[0, i - 1] 与 p[0, j - 1] 是否能够匹配
boolean[][] dp = new boolean[m + 1][n + 1];
dp[0][0] = true;

for (int j = 1; j <= n && p.charAt(j - 1) == '*'; j++) {
dp[0][j] = true;
}

for (int i = 1; i <= m; i++) {
for (int j = 1; j <= n; j++) {
char c = p.charAt(j - 1);
if (c == '*') {
// 匹配一个空字符串
dp[i][j] = dp[i][j - 1];
// 匹配一个字符
dp[i][j] |= dp[i - 1][j - 1];
// 匹配多个字符,不要忘记此场景
dp[i][j] |= dp[i - 1][j];
} else if (c == '?') {
dp[i][j] = dp[i - 1][j - 1];
} else {
dp[i][j] = c == s.charAt(i - 1) && dp[i - 1][j - 1];
}
}
}

return dp[m][n];
}
}

References

44. Wildcard Matching