Cod sursa(job #2221796)

Utilizator inquisitorAnders inquisitor Data 15 iulie 2018 20:30:18
Problema Aria Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.19 kb
Raporteaza aceasta sursa 
#import<fstream>
std::ifstream f("aria.in");main(){long double N,a,b,x,y,X,Y,S=0;f>>N>>a>>b;x=a;for(y=b;--N;S+=x*Y-X*y,x=X,y=Y)f>>X>>Y;S+=x*b-a*y;fprintf(fopen("aria.out","w"),"%.5Lf",S/2);}