OJ Board

hi,i was solving this problem,
i used this algorithm ,
find size of all row connected component and column connceted component in both board;
sort them then compare;
please if any can tell me where the wrong since you can only remove connected component by row or column

please igot WA and itied all testcases i found,all give me right answers,this is my code:
#include<stdio.h>
#include<vector>
#include<cstring>
#include<algorithm>
using namespace std;
int n;
#define Max 50100
int dp[Max];
vector< int> visited;
vector< vector< int> > adj;
//int dp[100000];
int dfs ...