CF 3C Tic-tac-toe

#include <iostream>
#include <cstring>
#include <cstdio>
using namespace std;

char data[5][5];
int _win[2][10];// 行123 列123 \/
int judgement(char c)
{
int judge = 0;
for(int i = 0; i < 3; i ++)
{
int flag = 1;
for(int j = 0; j < 3; j ++)
{
if(data[i][j] != c)
flag = 0;
}
if(flag)
{
judge = 1;
if(c == 'X')
_win[0][i] = 1;
if(c == '0')
_win[1][i] = 1;
}
}
for(int i = 0; i < 3; i ++)
{
int flag = 1;
for(int j = 0; j < 3; j ++)
{
if(data[j][i] != c)
flag = 0;
}
if(flag)
{
judge = 1;
if(c == 'X')
_win[0][3+i] = 1;
if(c == '0')
_win[1][3+i] = 1;
}
}
if(data[0][0] == data[1][1] && data[1][1] == data[2][2] && data[0][0] == c)//\/
{
judge = 1;
if(c == 'X')
_win[0][6] = 1;
if(c == '0')
_win[1][6] = 1;
}
if(data[0][2] == data[1][1] && data[1][1] == data[2][0] && data[0][2] == c)// /
{
judge = 1;
if(c == 'X')
_win[0][7] = 1;
if(c == '0')
_win[1][7] = 1;
}
return judge;
}
int main()
{
while(cin>>data[0]>>data[1]>>data[2])
{
memset(_win,0,sizeof(_win));
int sum1 = 0,sum2 = 0;
for(int i = 0; i < 3; i ++)
{
for(int j = 0; j < 3; j ++)
{
if(data[i][j] == 'X')
sum1 ++;
if(data[i][j] == '0')
sum2 ++;
}
}
int flag1 = 0,flag2 = 0;
flag1 = judgement('X');
flag2 = judgement('0');
if(flag1 && flag2)
{
cout<<"illegal"<<endl;
continue;
}
else if(!(sum1==sum2)&&!(sum1-sum2 == 1))
{
cout<<"illegal"<<endl;
continue ;
}
else if(!flag1 &&!flag2)
{
if(sum1 == 5 && sum2 == 4)
cout<<"draw"<<endl;
else if(sum1-sum2 ==1)
cout<<"second"<<endl;
else if(sum1 == sum2)
cout<<"first"<<endl;
continue;
}
else if(flag1 &&!flag2)
{
int flag = 0;
for(int i = 0; i < 3; i ++)
{
for(int j = 3; j < 6; j ++)
{
if(_win[0][j] == _win[0][i] &&_win[0][i] == 1)
flag = 1;
}
if(flag) break;
}
if(_win[0][6] == _win[0][7] &&_win[0][6]==1)
flag = 1;
if(flag)
{
cout<<"the first player won"<<endl;
continue;
}
if(sum1 - sum2 == 1)
{
cout<<"the first player won"<<endl;
continue ;
}
else
{
cout<<"illegal"<<endl;
continue ;
}
}
else if(!flag1 &&flag2)
{
if(sum2 == sum1)
{
cout<<"the second player won"<<endl;
continue ;
}
else
{
cout<<"illegal"<<endl;
continue ;
}
}
}
return 0;
}