#include<iostream>
#include<opencv3/highgui.hpp>

using namespace cv;
using namespace std;
int main()
{
 int blockSize,imageHieght,imageWidth;
 scanf("%d",&blockSize,&imageHieght,&imageWidth)
 Mat chessBoard(imageSize,imageSize,CV_8UC3,Scalar::all(0));
 unsigned char color=0;

 for(int i=0;i<imageHieght;i=i+blockSize)
    {
      color=~color;
      for(int j=0;j<imageWidth;j=j+blockSize)
         {
      Mat ROI=chessBoard(Rect(i,j,blockSize,blockSize));
      ROI.setTo(Scalar::all(color));
      color=~color;
         }
    }
    namedWindow("chessboard",WINDOW_AUTOSIZE);

opencv3/highgui.hpp :no such file or directory