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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5. long long a,b,l,n;
  6. (n-1)*b*2+a+a*(n*2-2)*2*l;
  7. return 0;
  8. }
Success #stdin #stdout 0.01s 5416KB
stdin
Standard input is empty
stdout
Standard output is empty