Cod sursa(job #2221804)

Utilizator inquisitorAnders inquisitor Data 15 iulie 2018 21:15:03
Problema Aria Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.18 kb
Raporteaza aceasta sursa 
#import<fstream>
std::ifstream f("aria.in");long double a,b,x,y,X,Y,S;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);}