Cod sursa(job #3210122)
Utilizator | Milandru Nicon-David DomnulMilandru | Data | 5 martie 2024 10:21:33 |
---|---|---|---|
Problema | Camera | Scor | 10 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva de probleme | Marime | 0.46 kb |
#include <fstream>
#include <vector>
using namespace std;
ifstream cin("camera.in");
ofstream cout("camera.out");
int n;
vector<double> X;
vector<double> Y;
double arie;
int main()
{
cin>>n;
X.resize(n);
Y.resize(n);
for(int i=0;i<n;i++)
cin>>X[i]>>Y[i];
for(int i=0;i<n-1;i++)
arie=arie+X[i]*Y[i+1]-Y[i]*X[i+1];
arie=arie+X[n-1]*Y[0]-Y[n-1]*X[0];
arie=abs(arie)/2;
cout<<arie;
return 0;
}