Saturday, May 25, 2024

# Codeforces Round #390 (Div. 2), problem: (B) Ilya and tic-tac-toe game Solution in C/C++

Codeforces Round #390 (Div. 2), problem: (B) Ilya and tic-tac-toe game Solution in C/C++

```#include<stdio.h>
#include<stdlib.h>
typedef unsigned u;
char S[4][4];u x,o;
void chk(u r,u c,u dr,u dc,u s,u l)
{
if(!(dr|dc))dr=-(dc=1);
if(r>3||c>3){x=o=0;return;}
if(l)x=o=0;
if(S[r][c]=='x')++x;
if(S[r][c]=='o')++o;
if(s)chk(r+dr,c+dc,dr,dc,s-1,0);
return;
}
int main()
{
u i,j,k;
scanf("%s%s%s%s",S[0],S[1],S[2],S[3]);
for(i=-1;++i<4;)for(j=-1;++j<4;)for(k=-1;++k<4;)
{
chk(i,j,k>>1,k&1,2,1);
if(x==2&&o==0){printf("YES\n");return 0;}
}
printf("NO\n");
return 0;
}```

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