#include
     
      #include
      
       #include
       
        #include
        
         using namespace std;int n;int x[30],y[30];class Coordinate{public:    double xCoordinate;    double yCoordinate;    Coordinate(double x = 0,double y = 0)    {        this->xCoordinate = x;        this->yCoordinate = y;    }    bool operator!=(Coordinate const &comp) const    {        return (this->xCoordinate != comp.xCoordinate ||                this->yCoordinate != comp.yCoordinate);    }}tp[10];bool Judge(Coordinate const x,Coordinate const y,Coordinate const z){    Coordinate *mVector = new Coordinate(x.xCoordinate - y.xCoordinate,                                        x.yCoordinate - y.yCoordinate);    Coordinate *nVector = new Coordinate(z.xCoordinate -                                        (x.xCoordinate + y.xCoordinate)/2,                                         z.yCoordinate -                                         (x.yCoordinate + y.yCoordinate)/2);    bool result = ((mVector->xCoordinate * nVector->xCoordinate +                    mVector->yCoordinate * nVector->yCoordinate) == 0);    if(result)        result = (mVector->xCoordinate * mVector->xCoordinate +                mVector->yCoordinate * mVector->yCoordinate)                 == ((nVector->xCoordinate * nVector->xCoordinate +                    nVector->yCoordinate * nVector->yCoordinate) * 4);    delete mVector;    delete nVector;    return result;}bool IsSquare(Coordinate *tp,int length){    if(length != 4)        return false;    int a,b,c;    if(Judge(tp[0],tp[1],tp[2]))    {        a = 0;        b = 1;        c = 2;    }    else if(Judge(tp[0],tp[2],tp[1]))    {        a = 0;        b = 2;        c = 1;    }    else if(Judge(tp[2],tp[1],tp[0]))    {        a = 1;        b = 2;        c = 0;    }    else        return false;    return (tp[3] != tp[c] && Judge(tp[a],tp[b],tp[3]));}int main(){    while(~scanf("%d",&n)){    int ans=0;    for(int i=0;i
        
       
      
     

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