[11758번] ccw

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

#include <iostream>
using namespace std;
 
int ccw(pair<int,int>a, pair<int, int>b,pair<int, int>c) {
    int tmp1 = a.first*b.second + b.first*c.second + c.first*a.second;
    int tmp2 = a.second*b.first + b.second*c.first + c.second*a.first;
    int ans = tmp1 - tmp2;
    if (ans < 0)return -1;
    else if (ans == 0)return 0;
    else return 1;
}
 
int main() {
    ios::sync_with_stdio(0), cin.tie(0);
    pair<int, int> tmp[3];
    for (int i = 0; i < 3; i++) {
        int x, y;
        cin >> x >> y;
        tmp[i] = { x,y };
    }
    cout << ccw(tmp[0], tmp[1], tmp[2]);
    return 0;
}