diff --git a/challenges/find-outlier-number/solutions/c/function/README.md b/challenges/find-outlier-number/solutions/c/function/README.md
new file mode 100644
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+++ b/challenges/find-outlier-number/solutions/c/function/README.md
@@ -0,0 +1,3 @@
+# find-outlier-number/c/function
+
+Created by [@Divlo](https://github.com/Divlo) on 30 September 2021.
diff --git a/challenges/find-outlier-number/solutions/c/function/solution.c b/challenges/find-outlier-number/solutions/c/function/solution.c
new file mode 100644
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+++ b/challenges/find-outlier-number/solutions/c/function/solution.c
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+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+bool is_odd(int number) {
+  return number % 2 == 1;
+}
+
+int find_outlier_number(int* numbers, size_t length) {
+  int outlier_number;
+  int* odd_numbers = malloc(length * sizeof(int));
+  int* even_numbers = malloc(length * sizeof(int));
+  size_t odd_length = 0;
+  size_t even_length = 0;
+  for (size_t index = 0; index < length; index++) {
+    if (is_odd(numbers[index])) {
+      odd_numbers[odd_length] = numbers[index];
+      odd_length++;
+    } else {
+      even_numbers[even_length] = numbers[index];
+      even_length++;
+    }
+  }
+  if (odd_length == 1) {
+    outlier_number = odd_numbers[0];
+  } else {
+    outlier_number = even_numbers[0];
+  }
+  free(odd_numbers);
+  free(even_numbers);
+  return outlier_number;
+}
+
+int main() {
+  size_t length = 0;
+  int number;
+  int* numbers = malloc(sizeof(int));
+  do {
+    scanf("%d", &number);
+    numbers = realloc(numbers, sizeof(int) * (length + 1));
+    numbers[length] = number;
+    length++;
+  } while (fgetc(stdin) != EOF);
+  printf("%d\n", find_outlier_number(numbers, length));
+  free(numbers);
+  return EXIT_SUCCESS;
+}
diff --git a/challenges/find-outlier-number/solutions/typescript/function/README.md b/challenges/find-outlier-number/solutions/typescript/function/README.md
deleted file mode 100644
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--- a/challenges/find-outlier-number/solutions/typescript/function/README.md
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@@ -1,3 +0,0 @@
-# find-outlier-number/typescript/function
-
-Created by [@Divlo](https://github.com/Divlo) on 6 June 2021.
diff --git a/challenges/find-outlier-number/solutions/typescript/function/solution.ts b/challenges/find-outlier-number/solutions/typescript/function/solution.ts
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--- a/challenges/find-outlier-number/solutions/typescript/function/solution.ts
+++ /dev/null
@@ -1,35 +0,0 @@
-import readline from 'node:readline'
-
-const input: string[] = []
-const readlineInterface = readline.createInterface({
-  input: process.stdin,
-  output: process.stdout
-})
-readlineInterface.on('line', (value) => {
-  input.push(value)
-})
-readlineInterface.on('close', solution)
-
-interface NumberObject {
-  value: number
-  index: number
-}
-
-const isOdd = (number: number): boolean => {
-  return number % 2 !== 0
-}
-
-function solution() {
-  const numbers = input.map((value) => Number(value))
-  const oddNumbers: NumberObject[] = []
-  const evenNumbers: NumberObject[] = []
-  numbers.forEach((number, index) => {
-    const numberObject: NumberObject = { value: number, index }
-    return isOdd(number)
-      ? oddNumbers.push(numberObject)
-      : evenNumbers.push(numberObject)
-  })
-  const isValueThatDiffersFromOthers =
-    oddNumbers.length === 1 ? oddNumbers[0] : evenNumbers[0]
-  console.log(isValueThatDiffersFromOthers.value)
-}