Solution #500 (C) - Daniel - 16/06/2025 - commit #5

Author: Daniel Nallapalli

Arrays & Strings/#500 - Keyboard Row - Easy/Solution.c

@@ -0,0 +1,30 @@
+/**
+ * Note: The returned array must be malloced, assume caller calls free().
+ */
+bool isInRow(const char* row, const char* word) {
+    for (int i = 0; word[i]; i++) {
+        if (!strchr(row, tolower(word[i]))) {
+            return false;
+        }
+    }
+    return true;
+}
+
+char** findWords(char** words, int wordsSize, int* returnSize) {
+    const char* row1 = "qwertyuiop";
+    const char* row2 = "asdfghjkl";
+    const char* row3 = "zxcvbnm";
+
+    char** result = (char**)malloc(wordsSize * sizeof(char*));
+    int count = 0;
+
+    for (int i = 0; i < wordsSize; i++) {
+        char* word = words[i];
+        if (isInRow(row1, word) || isInRow(row2, word) || isInRow(row3, word)) {
+            result[count++] = word;
+        }
+    }
+
+    *returnSize = count;
+    return result;
+}