diff --git a/CSES/Intro/IncreasingArray.cpp b/CSES/Intro/IncreasingArray.cpp
new file mode 100644
index 00000000..290f10c0
--- /dev/null
+++ b/CSES/Intro/IncreasingArray.cpp
@@ -0,0 +1,22 @@
+#include<bits/stdc++.h>
+using namespace std;
+int main()
+{
+    int n;
+    cin>>n;
+    long long a[n];
+    for(int i=0;i<n;i++){
+        cin>>a[i];
+    }
+    long long count=0;
+    if(n==1){cout<<0<<endl;}
+    else{
+        for(int i=1;i<n;i++){
+            if(a[i]<a[i-1]){count+=(a[i-1]-a[i]);
+            a[i]=a[i-1];}
+        }
+        cout<<count<<endl;
+    }
+ 
+    return 0;
+}