diff --git a/486A Calculating Function/486A.cpp b/486A Calculating Function/486A.cpp
new file mode 100644
index 0000000..f888447
--- /dev/null
+++ b/486A Calculating Function/486A.cpp	
@@ -0,0 +1,23 @@
+#include <bits/stdc++.h>
+using namespace std;
+using ll = long long;
+
+void solve()
+{
+    ll n,sum=0;
+    cin>>n;
+    if(n%2==0) sum=n/2;
+    else sum=-(n/2+1);
+    cout<<sum<<endl;
+}
+
+int main()
+{
+    ios_base::sync_with_stdio(false);
+    cin.tie(nullptr);
+
+    int TC = 1;
+    //cin >> TC;
+    //cin.ignore();
+    while (TC--) solve();
+}
\ No newline at end of file