diff --git a/Algorithm/Slidingwindow.cpp b/Algorithm/Slidingwindow.cpp
index 7697e59..8d72f38 100644
--- a/Algorithm/Slidingwindow.cpp
+++ b/Algorithm/Slidingwindow.cpp
@@ -51,3 +51,5 @@ int lengthOfLongestSubstring(string s) {
      string t;
      cin>>t;
      cout<<"The length of longest substring is : "<<lengthOfLongestSubstring(t);
+     return 0;
+   }
diff --git a/Algorithm/Smallest number given threshold b/Algorithm/Smallest_Number_Threshold.cpp
similarity index 97%
rename from Algorithm/Smallest number given threshold
rename to Algorithm/Smallest_Number_Threshold.cpp
index c250c0f..97c24d2 100644
--- a/Algorithm/Smallest number given threshold	
+++ b/Algorithm/Smallest_Number_Threshold.cpp
@@ -1,3 +1,6 @@
+#include<bits/stdc++.h>
+using namespace std;
+
 class Solution {
 public: