diff --git a/memoization.cpp b/memoization.cpp
new file mode 100644
index 0000000..391b0db
--- /dev/null
+++ b/memoization.cpp
@@ -0,0 +1,27 @@
+#include<bits/stdc++.h>
+#include<iostream>
+#define mod 1000000007
+typedef long long int lli;
+lli fib(lli n,lli memo[])
+{
+        lli res;
+        if(memo[n]!=0)
+                return memo[n];
+        if(n==1 ||  n==2)
+                res = 1;
+        else
+                res = fib(n-1,memo) + fib(n-2,memo);
+        memo[n]=res;
+        return res;
+}
+using namespace std;
+int main()
+{
+        lli memo[100000]={0},n,p;
+        cout<<"Enter the value of n :\n";
+        cin>>n;
+        p = fib(n,memo);
+        cout<<p<<endl;
+        return 0;
+}
+