#include "artclass.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vii;
typedef pair<int,int> pi;
typedef vector<pi> pii;
typedef tuple<int,int,int> ti;
typedef vector<ll> li;
typedef vector<li> lii;
#define REP(i,a,b) for(int i=a;i<b;i++)
#define F first
#define S second
#define PB push_back
#define LSOne(s) ((s)&(-s))
#define all(x) (x).begin(),(x).end()
ll INF=1000000000000000010;
int inf=1e9+10;
ll M=1e9+7;
int style(int n, int m, int R[500][500], int G[500][500], int B[500][500]) {
int cnt=0;
vector<pi> loc={{1,0},{-1,0},{0,1},{0,-1}};
int c=10;
REP(i,1,n-1)REP(j,1,m-1){
bool flag=1;
REP(k,0,4){
int x=loc[k].F,y=loc[k].S;
if(abs(R[i][j]-R[i+x][j+y])>c)flag=0;
if(abs(G[i][j]-G[i+x][j+y])>c)flag=0;
if(abs(B[i][j]-B[i+x][j+y])>c)flag=0;
}
if(flag)cnt++;
}
if(cnt>(n*m)/2){
int k=0;
REP(i,0,n)REP(j,0,m)if(G[i][j]>150&&R[i][j]>150)k++;
if(k>(n*m)/4)return 1;
else return 4;
}
else{
int k=0;
REP(i,0,n)REP(j,0,m)if(R[i][j]>150)k++;
if(k>(n*m)/3)return 3;
else return 2;
}
}
