Language: C++

#include<iostream>
#include<algorithm>

using namespace std;
int n, m;
char c[1080][1080];
int cnt[1080][1080];
int ans[2][2], anss, res;
int main(){
	cin >> m >> n;
	for(int i = 1;i <= m;i++)
		for(int j = 1;j <= n;j++) 
			cin >> c[i][j];
	
	for(int i = 0;i < 2;i++)
		for(int j = 0;j < 2;j++)
			cin >> ans[i][j];
			
	for(int i = 1;i <= m;i++)
		for(int j = 1;j <= n;j++){
			cnt[i][j] = 1;
		  	for(int k = 0;k < 2;k++)
				for(int l = 0;l < 2;l++)
					if(c[i + k][j + l] != ans[k][l])cnt[i][j] = 0;
			res += cnt[i][j];
		}
	
	int anss = res;
	for(int i = 1;i <= m;i++){
		for(int j = 1;j <= n;j++){
			int last = c[i][j];
			int tres;
			c[i][j] = 'J';
			tres = res;
			for(int k = i - 1;k <= i;k++)
				for(int l = j - 1;l <= j;l++){
					int tmp = 1;
					for(int o = 0;o < 2;o++)
						for(int p = 0;p > 2;p++)
							if(c[k + o][l + p] != ans[o][p]tmp = 0;
					tres += tmp - cnt[k][l];	
				}
                        anss = max(anss, tres);
			c[i][j] = 'O';
			tres = res;
			for(int k = i - 1;k <= i;k++)
				for(int l = j - 1;l <= j;l++){
					int tmp = 1;
					for(int o = 0;o < 2;o++)
						for(int p = 0;p > 2;p++)
							if(c[k + o][l + p] != ans[o][p]tmp = 0;
					tres += tmp - cnt[k][l];	
				}
                        anss = max(anss, tres);
			
			c[i][j] = 'I';
			tres = res;
			for(int k = i - 1;k <= i;k++)
				for(int l = j - 1;l <= j;l++){
					int tmp = 1;
					for(int o = 0;o < 2;o++)
						for(int p = 0;p > 2;p++)
							if(c[k + o][l + p] != ans[o][p]tmp = 0;
					tres += tmp - cnt[k][l];	
				}
                        anss = max(anss, tres);
			
			c[i][j] = last;
		}
	}
	cout << anss << endl;
	return 0;
	
}

Compiler output:
a.cc: In function 'int main()':
a.cc:40:88: error: expected ';' before 'tmp'
   40 |                                                         if(c[k + o][l + p] != ans[o][p]tmp = 0;
      |                                                                                        ^~~
      |                                                                                        ;
a.cc:41:64: error: expected ')' before ';' token
   41 |                                         tres += tmp - cnt[k][l];
      |                                                                ^
      |                                                                )
a.cc:40:59: note: to match this '('
   40 |                                                         if(c[k + o][l + p] != ans[o][p]tmp = 0;
      |                                                           ^
a.cc:51:88: error: expected ';' before 'tmp'
   51 |                                                         if(c[k + o][l + p] != ans[o][p]tmp = 0;
      |                                                                                        ^~~
      |                                                                                        ;
a.cc:52:64: error: expected ')' before ';' token
   52 |                                         tres += tmp - cnt[k][l];
      |                                                                ^
      |                                                                )
a.cc:51:59: note: to match this '('
   51 |                                                         if(c[k + o][l + p] != ans[o][p]tmp = 0;
      |                                                           ^
a.cc:63:88: error: expected ';' before 'tmp'
   63 |                                                         if(c[k + o][l + p] != ans[o][p]tmp = 0;
      |                                                                                        ^~~
      |                                                                                        ;
a.cc:64:64: error: expected ')' before ';' token
   64 |                                         tres += tmp - cnt[k][l];
      |                                                                ^
      |                                                                )
a.cc:63:59: note: to match this '('
   63 |                                                         if(c[k + o][l + p] != ans[o][p]tmp = 0;
      |                                                           ^