Create 1015. Smallest Integer Divisible by K (#942)

Author: Chayandas07

1015. Smallest Integer Divisible by K

@@ -0,0 +1,12 @@
+class Solution {
+public:
+    int smallestRepunitDivByK(int k) {
+        if (k % 2 == 0 || k % 5 == 0) return -1;
+        int r = 0;
+        for (int i = 1; i <= k; i++) {
+            r = (r * 10 + 1) % k;
+            if (r == 0) return i;
+        }
+        return -1;
+    }
+};