Cod sursa(job #2776438)

Utilizator BlaugranasEnal Gemaledin Blaugranas Data 19 septembrie 2021 19:42:54
Problema Aria Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.25 kb
Raporteaza aceasta sursa 
#include<fstream>
using namespace std;
ifstream f("aria.in");
long double a,b,x,y,X,Y,S;
int main()
{
    f>>a>>a>>b,x=a;
    for(y=b;f>>X>>Y;x=X,y=Y)
        S+=x*Y-X*y;S+=x*b-a*y;
    fprintf(fopen("aria.out","w"),"%.5Lf",S/2);
    return 0;
}