#include "artclass.h"
#include <cstdlib>
#include <cmath>
#define D(i,j,k,l) (abs(R[i][j] - R[k][l])+abs(G[i][j] - G[k][l])+abs(B[i][j] - B[k][l]))
int style(int H, int W, int R[500][500], int G[500][500], int B[500][500]) {
double delta = 0;
for (int i=0; i<H; i++) {
for (int j=0; j<W-1; j++) {
double x = sqrt(D(i,j,i,j+1));
if(x > 2 )delta += x;
}
}
for (int j=0; j<W; j++) {
for (int i=0; i<H-1; i++) {
double x = sqrt(D(i,j,i+1,j));
if(x > 1.9) delta += x;
}
}
double t = 100.0 * delta / (2 * W * H - H - W);
if(t < 190) return 4;
else if(t < 400) return 1;
else if(t< 675) return 2;
return 3;
}
