diff --git a/ARRFILL.cpp b/ARRFILL.cpp
new file mode 100644
index 0000000..ac31032
--- /dev/null
+++ b/ARRFILL.cpp
@@ -0,0 +1,41 @@
+/*
+codechef problem link : https://www.codechef.com/problems/ARRFILL
+codechef profile link : https://www.codechef.com/users/santosh_01
+*/
+
+#include<bits/stdc++.h>
+using namespace std;
+int main()
+{
+  ios_base::sync_with_stdio(0);
+  cin.tie(0);
+  cout.tie(0);
+  
+  int T;
+  cin >> T;
+  while(T--) {
+    long long int  n, m;
+    cin>>n>>m;
+    vector<pair<int,int>>vp;
+    for (int i=0; i < m; i++)
+    {
+      long long  x, y;
+      cin>>x>>y;
+      vp.push_back({x,y});
+    }
+    sort(vp.begin(), vp.end(), greater<pair<int,int>>());
+    
+   long long int lcm=1;
+    long long int  rem=n;
+    long long res=0;
+    
+    for (int i=0; i<m && rem>0; i++){
+        long long int  a= vp[i].first,b=vp[i].second;
+        lcm = lcm*b/__gcd(lcm,b);
+        res += (rem-n/lcm)*a;
+        rem= n/lcm;
+    }
+    cout <<res<<endl;
+  }
+  return 0;
+}