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  1. #include <iostream>
  2. #include <assert.h>
  3. #include <math.h>
  4. #include <iomanip>
  5.  
  6. using namespace std;
  7.  
  8. int main() {
  9.  
  10. 	long double x,y,va,vb;
  11.  
  12. 	cin >> x >> y >> va >> vb;
  13.  
  14. 	if(x < 1) { cout << "Invalid Input"; return 0; }
  15. 	if(y < 1) { cout << "Invalid Input"; return 0; }
  16. 	if(va < 1) { cout << "Invalid Input"; return 0; }
  17. 	if(vb < 1) { cout << "Invalid Input"; return 0; }
  18.  
  19. 	long double t = (x*va + y*vb)/(pow(va,2.00000000000) + pow(vb,2.00000000000));
  20.  
  21. 	long double diff = (pow((x-t*va),2.00000000000)) + (pow((y-t*vb),2.00000000000));
  22.  
  23. 	long double fa = sqrt(diff);
  24.  
  25. 	if(fa == 0) {
  26. 		cout << "0.0";
  27. 	}
  28. 	else {
  29. 		cout << setprecision(13) << fa << endl;
  30. 	}
  31.  
  32. 	return 0;
  33. }
Success #stdin #stdout 0s 3464KB
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40.96159602595
https://ideone.com/K8JMIQ
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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