delete pics to save space

4.1896.cpp

@@ -0,0 +1,9 @@
+#include<iostream>
+using namespace std;
+int a,b,c;
+int main()
+{
+    cin>>a>>b>>c;
+    cout<<(a*b+a*c+b*c)*2<<endl;
+    return 0;
+}