Cod sursa(job #3368788)

Utilizator Marocanu07wee weew Marocanu07 Data 15 octombrie 2026 19:25:36
Problema Aria Scor 0
Compilator c-64 Status done
Runda Arhiva educationala Marime 0.28 kb
Raporteaza aceasta sursa 
#include<stdio.h>


int main(){

int n,x1,x2,y1,y2,arie=0,cx,cy;
scanf("%d%d%d",&n,&x1,&y1);
cx=x1,cy=y1;

for(int i=1;i<n;i++){
    scanf("%d%d",&x2,&y2);
    arie+=x1*y2-x2*y1;

    x1=x2,y1=y2;
}

arie+=x1*cy-cx*y1;

printf("%d",arie/2);
   

  
    return 0;
}