Cod sursa(job #3120552)
Utilizator | Enal Gemaledin Blaugranas | Data | 7 aprilie 2023 14:28:40 |
---|---|---|---|
Problema | Aria | Scor | 100 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva educationala | Marime | 0.25 kb |
#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>>e>>a>>b,e=a,f=b;F>>c>>d;g+=a*d-b*c,a=c,b=d);
return G<<fixed<<setprecision(5)<<(g+c*f-e*d)/2,0;
}