#include <bits/stdc++.h>
#include "artclass.h"
using namespace std;
void debug_out(){cerr << endl;}
template<typename Head, typename... Tail>
void debug_out(Head H, Tail... T){
cerr << H << ' ';
debug_out(T...);
}
#define debug(...) cerr << "(" << #__VA_ARGS__ << "): ", debug_out(__VA_ARGS__)
int style(int n, int m, int r[500][500], int g[500][500], int b[500][500]) {
double diff = 0, white = 0;
for (int i = 0; i < n; i++){
for (int j = 0; j < m; j++){
if (i){
diff += abs(r[i][j] - r[i-1][j]) + abs(g[i][j] - g[i-1][j]) + abs(b[i][j] - b[i-1][j]);
}
if (j){
diff += abs(r[i][j] - r[i][j-1]) + abs(g[i][j] - g[i][j-1]) + abs(b[i][j] - b[i][j-1]);
}
if (min({r[i][j], b[i][j], g[i][j]}) >= 200) white++;
}
}
diff /= (n*m);
white /= (n*m);
//debug(diff, white);
if (white < 0.1){
if (diff <= 20) return 4;
return 2;
}
if (diff <= 15) return 4;
if (diff <= 50) return 1;
if (diff <= 100) return 2;
return 3;
}
