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author | jack <[email protected]> | 2024-06-14 13:13:15 -0600 |
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committer | jack <[email protected]> | 2024-06-14 13:13:15 -0600 |
commit | d343a3b18dbaca9297d4f7b2280c4a16f0a5c8aa (patch) | |
tree | 96df922dae2a5073d9a50ea70c7aae6aa37e3ebe /find_replace_pattern.c | |
download | leetcode-d343a3b18dbaca9297d4f7b2280c4a16f0a5c8aa.tar.gz leetcode-d343a3b18dbaca9297d4f7b2280c4a16f0a5c8aa.zip |
initial
Diffstat (limited to 'find_replace_pattern.c')
-rw-r--r-- | find_replace_pattern.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/find_replace_pattern.c b/find_replace_pattern.c new file mode 100644 index 0000000..64dc015 --- /dev/null +++ b/find_replace_pattern.c @@ -0,0 +1,48 @@ +#include <stdbool.h> +#include <stddef.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +bool check(char *word, char *lookup, char *q) { + memset(lookup, -1, 26); + for (int i = 0; word[i] != '\0'; ++i) { + if (lookup[word[i] - 'a'] == -1) + lookup[word[i] - 'a'] = i; + if (q[i] != lookup[word[i] - 'a']) + return false; + } + return true; +} + +// note the returned array must be malloc'd (assume caller free()'s) + +char **findAndReplacePattern(char **words, int wordsSize, char *pattern, + int *returnSize) { + char lookup[26]; + memset(lookup, -1, 26); + char q[50] = {0}; + char **ans = malloc(sizeof(char **) * wordsSize); + size_t len = strlen(pattern); + for (int i = 0; i < len; ++i) { + if (lookup[pattern[i] - 'a'] == -1) + lookup[pattern[i] - 'a'] = i; + q[i] = lookup[pattern[i] - 'a']; + } + int sz = 0; + for (int i = 0; i < wordsSize; ++i) { + if (check(words[i], lookup, q)) { + char *k = malloc(sizeof(char) * (len + 1)); + memcpy(k, words[i], len + 1); + ans[sz++] = k; + } + } + *returnSize = sz; + return ans; +} + +int main() { + char *words1[] = {"abc", "deq", "mee", "aqq", "dkd", "ccc"}, + *words2[] = {"a", "b", "c"}; + char pattern1[] = {"abb"}, pattern2[] = {"a"}; +} |