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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. struct path {
  5.  double time;
  6.  double velocity;
  7.  double length;
  8. };
  9.  
  10. void calc_length (struct path *s1);
  11. double solve (double half_path,
  12.       struct path s1,
  13.       struct path s2, 
  14.       struct path s3);
  15.  
  16. int main() {
  17.  struct path s1, s2, s3 ;
  18.  double half_path;
  19.  
  20.  cin >> s1.time >> s2.time >> s3.time;
  21.  cin >> s1.velocity >> s2.velocity >> s3.velocity;
  22.  
  23.  calc_length(&s1);
  24.  calc_length(&s2);
  25.  calc_length(&s3);
  26.  
  27.  half_path = (s1.length + s2.length + s3.length)/2;
  28.  cout << solve( half_path, s1, s2, s3) << endl;
  29.  
  30.  return 0;
  31. }
  32.  
  33. void calc_length (struct path *s){
  34.  s->length = s->time*s->velocity;
  35. }
  36.  
  37. double solve (double half_path,
  38.       struct path s1,
  39.       struct path s2, 
  40.       struct path s3){
  41.  
  42.  if (half_path <= s1.length) {
  43.   return half_path/s1.velocity ;
  44.  }
  45.  else if (half_path <= (s1.length + s2.length)) {
  46.   return s1.time + (half_path - s1.length)/s2.velocity ; 
  47.  }
  48.  else {
  49.   return s1.time + s2.time + (half_path - s1.length - s2.length);
  50.  }
  51. }
Success #stdin #stdout 0s 3480KB
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stdin
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4.5 75.9 3.124
100 0 0

-9 85 3
450 230 20

2 3 4
90 80 30
stdout
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2.25
https://ideone.com/miKaFp
2.19 (о половине пути)
language:
C++ (gcc 8.3)
created:
10 years ago
visibility:
public

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