#include "artclass.h"
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
ll adj_diff(int H, int W, int R[500][500], int G[500][500], int B[500][500]){
ll ret = 0;
int lr = 0, lg = 0, lb = 0;
for (int i = 0; i < H; ++i){
for (int j = 0; j < W; ++j){
ll cur = abs(R[i][j] - lr) + abs(G[i][j] - lg) + abs(B[i][j] - lb);
ret += cur;
lr = R[i][j], lg = G[i][j], lb = B[i][j];
}
}
return ret / H / W;
}
ll total_color(int H, int W, int R[500][500], int G[500][500], int B[500][500]){
ll ret = 0;
for (int i = 0; i < H; ++i){
for (int j = 0; j < W; ++j){
ret += (R[i][j] + G[i][j] + B[i][j]) * (R[i][j] + G[i][j] + B[i][j]);
}
}
return ret / H / W;
}
int style(int H, int W, int R[500][500], int G[500][500], int B[500][500]) {
ll diff = adj_diff(H, W, R, G, B);
ll color = total_color(H, W, R, G, B);
if (diff <= 8) return 4;
if (diff >= 54) return 3;
if (color >= 150'000) return 1;
return 2;
}
