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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5. int r, n, k;
  6. cin>>n>>k;
  7. r=k>3? n*(k-3)-1 : n>1? n-1 : 1;
  8. cout<<r;
  9. return 0;
  10. }
Success #stdin #stdout 0s 3472KB
stdin
5 4
stdout
4