NEFU要崛起第2场 C - Tic-tac-toe
Description
Certainly, everyone is familiar with tic-tac-toe game. The rules are very simple indeed. Two players take turns marking the cells in a 3 × 3 grid (one player always draws crosses, the other — noughts). The player who succeeds first in placing three of his marks in a horizontal, vertical or diagonal line wins, and the game is finished. The player who draws crosses goes first. If the grid is filled, but neither Xs, nor 0s form the required line, a draw is announced.
You are given a 3 × 3 grid, each grid cell is empty, or occupied by a cross or a nought. You have to find the player (first or second), whose turn is next, or print one of the verdicts below:
- illegal — if the given board layout can't appear during a valid game;
- the first player won — if in the given board layout the first player has just won;
- the second player won — if in the given board layout the second player has just won;
- draw — if the given board layout has just let to a draw.
Input
The input consists of three lines, each of the lines contains characters ".", "X" or "0" (a period, a capital letter X, or a digit zero).
Output
Print one of the six verdicts: first, second, illegal, the first player won, the second player won or draw.
Sample Input
X0X .0. .X.
second
表示很纠结，弱爆了…………n次wa后，看了若干测试样例后终于A了。各种情况，考虑不周啊。
#include<iostream>
#include<stdio.h>
using namespace std;
char map[3][3];
int main()
{
while(scanf("%s",&map[0])!=EOF)
{
int flag=0,flag2=0;
int num1=0,num2=0,num3=0;
scanf("%s",&map[1]);
scanf("%s",&map[2]);
for(int i=0; i<3; i++)
for(int j=0; j<3; j++)
{
if(map[i][j]=='X')
num1++;
if(map[i][j]=='0')
num2++;
if(map[i][j]=='.')
num3++;
}
if(map[0][0]=='X')
{
if((map[0][1]=='X'&&map[0][2]=='X')||(map[1][0]=='X'&&map[2][0]=='X')||(map[1][1]=='X'&&map[2][2]=='X'))
flag=1;
}
if(map[0][0]=='0')
{
if((map[0][1]=='0'&&map[0][2]=='0')||(map[1][0]=='0'&&map[2][0]=='0')||(map[1][1]=='0'&&map[2][2]=='0'))
flag2=1;
}
if(map[0][1]=='X')
{
if((map[0][0]=='X'&&map[0][2]=='X')||(map[1][1]=='X'&&map[2][1]=='X'))
flag=1;
}
if(map[0][1]=='0')
{
if((map[0][0]=='0'&&map[0][2]=='0')||(map[1][1]=='0'&&map[2][1]=='0'))
flag2=1;
}
if(map[0][2]=='X')
{
if((map[0][1]=='X'&&map[0][0]=='X')||(map[1][1]=='X'&&map[2][0]=='X')||(map[1][2]=='X'&&map[2][2]=='X'))
flag=1;
}
if(map[0][2]=='0')
{
if((map[0][1]=='0'&&map[0][0]=='0')||(map[1][1]=='0'&&map[2][0]=='0')||(map[1][2]=='0'&&map[2][2]=='0'))
flag2=1;
}
if(map[1][0]=='X')
{
if((map[0][0]=='X'&&map[2][0]=='X')||(map[1][1]=='X'&&map[1][2]=='X'))
flag=1;
}
if(map[1][0]=='0')
{
if((map[0][0]=='0'&&map[2][0]=='0')||(map[1][1]=='0'&&map[1][2]=='0'))
flag2=1;
}
if(map[1][1]=='X')
{
if((map[0][0]=='X'&&map[2][2]=='X')||(map[0][1]=='X'&&map[2][1]=='X')||(map[0][2]=='X'&&map[2][0]=='X')||
(map[1][0]=='X'&&map[1][2]=='X'))
flag=1;
}
if(map[1][1]=='0')
{
if((map[0][0]=='0'&&map[2][2]=='0')||(map[0][1]=='0'&&map[2][1]=='0')||(map[0][2]=='0'&&map[2][0]=='0')||
(map[1][0]=='0'&&map[1][2]=='0'))
flag2=1;
}
if(map[1][2]=='X')
{
if((map[1][0]=='X'&&map[1][1]=='X')||(map[0][2]=='X'&&map[2][2]=='X'))
flag=1;
}
if(map[1][2]=='0')
{
if((map[1][0]=='0'&&map[1][1]=='0')||(map[0][2]=='0'&&map[2][2]=='0'))
flag2=1;
}
if(map[2][2]=='X')
{
if((map[2][1]=='X'&&map[2][0]=='X')||(map[1][2]=='X'&&map[0][2]=='X')||(map[1][1]=='X'&&map[0][0]=='X'))
flag=1;
}
if(map[2][2]=='0')
{
if((map[2][1]=='0'&&map[2][0]=='0')||(map[1][2]=='0'&&map[0][2]=='0')||(map[1][1]=='0'&&map[0][0]=='0'))
flag2=1;
}
if(map[2][1]=='X')
{
if((map[2][0]=='X'&&map[2][2]=='X')||(map[1][1]=='X'&&map[0][1]=='X'))
flag=1;
}
if(map[2][1]=='0')
{
if((map[2][0]=='0'&&map[2][2]=='0')||(map[1][1]=='0'&&map[0][1]=='0'))
flag2=1;
}
if(map[2][0]=='X')
{
if((map[1][0]=='X'&&map[0][0]=='X')||(map[1][1]=='X'&&map[0][2]=='X')||(map[2][1]=='X'&&map[2][2]=='X'))
flag=1;
}
if(map[2][0]=='0')
{
if((map[1][0]=='0'&&map[0][0]=='0')||(map[1][1]=='0'&&map[0][2]=='0')||(map[2][1]=='0'&&map[2][2]=='0'))
flag2=1;
}
if(num1-num2>1||num1<num2)
cout<<"illegal"<<endl;
else if(flag==1&&!flag2)
{
if(num1==num2)
cout<<"illegal"<<endl;
else
cout<<"the first player won"<<endl;
}
else if(!flag&&flag2==1)
{
if(num1-num2==1)
cout<<"illegal"<<endl;
else
cout<<"the second player won"<<endl;
}
else if(flag==1&&flag2==1)
cout<<"illegal"<<endl;
else if(!flag&&!flag2)
{
if(num3>0)
{
if(num1-num2==1)
cout<<"second"<<endl;
else if(num1==num2)
cout<<"first"<<endl;
}
else
{
if(num1-num2==1)
cout<<"draw"<<endl;
else
cout<<"illegal"<<endl;
}
}
}
return 0;
}