Cod sursa(job #3123391)

Utilizator unomMirel Costel unom Data 23 aprilie 2023 14:11:38
Problema Aria Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.25 kb
Raporteaza aceasta sursa 
#include<bits/stdc++.h>
using namespace std;
ifstream F("aria.in");
ofstream G("aria.out");
long double a,b,c,d,e,f,g;
int main()
{
    for(F>>c>>a>>b,e=a,f=b;F>>c>>d;g+=a*d-b*c,a=c,b=d);
    return G<<fixed<<setprecision(5)<<(g+a*f-b*e)/2,0;
}