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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5. // your code goes here
  6. float a,c,b,d,p;
  7. int x,y,n;
  8. cin>>x;
  9. cin>>y;
  10. cin>>n;
  11. cin>>p;
  12. if(p<x) a=p;
  13. else a=p-y;
  14. b=p/10;
  15. c=b*n;
  16. d=min(a,c);
  17. printf("%.2f",d);
  18.  
  19. return 0;
  20. }
Success #stdin #stdout 0.01s 5288KB
stdin
8
7
2
11
stdout
2.20