Check If It Is a Straight Line.cpp

#include <vector>




using namespace std;


class Solution {
public:
    bool checkStraightLine(vector<vector<int>>& coordinates)
    {
        int nPoints = coordinates.size();
        int x = coordinates[1][0] - coordinates[0][0];
        int y = coordinates[1][1] - coordinates[0][1];

        for(int i = 2; i < nPoints; i++)
        {
            if((coordinates[i][0] - coordinates[0][0]) * y != (coordinates[i][1] - coordinates[0][1]) * x)
            {
                return false;
            }
        }
        return true;
    }
};