[백준] 11758번 : CCW - C

https://www.acmicpc.net/problem/11758

#include<stdio.h>
#include<math.h>

int main() {
    int x1,y1,x2,y2,x3,y3;
    scanf("%d %d %d %d %d %d",&x1,&y1,&x2,&y2,&x3,&y3);
    
    int a=x1*y2+x2*y3+x3*y1;
    int b=x2*y1+x3*y2+x1*y3;
    
    if(a-b>0) printf("1");
    else if(a-b<0) printf("-1");
    else printf("0");
}