class Solution {

public:

    bool checkStraightLine(vector<vector<int>>& coordinates) {

        int x0 = coordinates[0][0];
        int y0 = coordinates[0][1];
        int x1 = coordinates[1][0];
        int y1 = coordinates[1][1];

        

        for (int i = 2; i < coordinates.size(); i++) {

            int x = coordinates[i][0];
            int y = coordinates[i][1];
            if ((x - x0) * (y1 - y0) != (y - y0) * (x1 - x0)) {

                return false;

            }

        }

        

        return true;

    }

};