diff --git a/1015.cpp b/1015.cpp
new file mode 100644
index 0000000..3b9af9b
--- /dev/null
+++ b/1015.cpp
@@ -0,0 +1,37 @@
+class Solution {
+public:
+    int smallestRepunitDivByK(int K) {
+        
+        if(K%2==0){
+            return -1;
+        }
+        if(K%5==0){
+            return -1;
+        }
+        if(K==1){
+            return 1;
+        }
+        
+        int n=1;
+        int remainder=1;
+        
+        int count=1;
+               
+        while(remainder!=0){
+           
+            remainder=remainder*10  + 1 ; 
+            remainder=remainder%K;
+            count++;
+            
+            if(remainder==0){
+                return count;
+            }
+            
+        }
+        
+        return -1;
+        
+        
+        
+    }
+};
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