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  1. #include <iostream>
  2. #include <vector>
  3. #include  <iomanip>
  4.  
  5.  
  6.  
  7. using namespace std;
  8. double bez(double x)
  9. {
  10.     if(x<0)
  11.     {
  12.         return x*-1;
  13.     }
  14.     else
  15.     {
  16.         return x;
  17.     }
  18. }
  19.  
  20. double Pole(double x,double y,double x1,double y1)
  21. {
  22.     double p;
  23.     p=((x*y1)-(x1*y))/2;
  24.    return bez(p);
  25. }
  26.  
  27.  
  28. int main()
  29. {
  30.  
  31.     int ile,a,b,c,d;
  32.     double pole,p2,x=-1;
  33.     vector <double> wx;
  34.     vector <double> wy;
  35.  
  36.     cin>>ile;
  37.     for(int i=0;i<ile*2;i++)
  38.     {
  39.         x+=2;
  40.         cin>>a;
  41.         cin>>b;
  42.         cin>>c;
  43.         cin>>d;
  44.         wx.push_back(c-a);
  45.         wy.push_back(d-b);
  46.         cin>>c;
  47.         cin>>d;
  48.         wx.push_back(c-a);
  49.         wy.push_back(d-b);
  50.         pole=Pole(wx[x-1],wy[x-1],wx[x],wy[x]);
  51.         while((c!=a)||(d!=b))
  52.         {
  53.             x++;
  54.             cin>>c;
  55.             cin>>d;
  56.             wx.push_back(c-a);
  57.             wy.push_back(d-b);
  58.           if((wy[x]/wx[x])>(wy[x-1]/wx[x-1])&&wx[x]>=0||(wy[x]/wx[x])<(wy[x-1]/wx[x-1])&&wx[x]<0)
  59.             {
  60.                 pole+=Pole(wy[x],wx[x],wy[x-1],wx[x-1]);;
  61.             }
  62.             else
  63.             {
  64.                 pole-=Pole(wy[x],wx[x],wy[x-1],wx[x-1]);
  65.             }
  66.         }
  67.         pole=bez(pole);
  68.          if(i%2==0)
  69.             {
  70.                 p2=pole;
  71.  
  72.             }
  73.             else
  74.                 {
  75.                     cout<<setprecision(1000);
  76.                     if(pole>p2)
  77.                     cout<<(p2*10)+(pole-p2)*6<<endl;
  78.                     else
  79.                     cout<<(pole*10)+(p2-pole)*6<<endl;
  80.                 }
  81.  
  82.     }
  83.     return 0;
  84. }
Success #stdin #stdout 0s 15232KB
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https://ideone.com/tQjD3A
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
public

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