1 files changed, 18 insertions, 0 deletions
diff --git a/leetcode/0258/main.c b/leetcode/0258/main.c
new file mode 100644
index 0000000..488e06e
--- /dev/null
+++ b/leetcode/0258/main.c
@@ -0,0 +1,18 @@
+#include <stdio.h>
+int addDigits(int num) {
+    while (num >= 10) {
+	int sum = 0;
+	while (sum > 0) {
+	    sum += num % 10;
+	    num /= 10;
+	}
+	num = sum;
+    }
+
+    return num;
+}
+
+
+int main() {
+   return 0;
+}