#include
#include
#include
const int MAX=105;
using namespace std;
typedef struct p
{
double x;
double y;
}P;
int main(void)
{
P po[MAX];
int n,i;
double k;
cin>>n;
cin>>k;
for( i=0;i>po[i].x>>po[i].y;
}
double tal=0;
for( i=1;i
#include
#include
#include
const int MAX=105;
using namespace std;
typedef struct p
{
double x;
double y;
}P;
int main(void)
{
P po[MAX];
int n,i;
double k;
cin>>n;
cin>>k;
for( i=0;i>po[i].x>>po[i].y;
}
double tal=0;
for( i=1;i