4245 Su-Su-Sudoku WA

[Obaida]

Some one please post some test case for me. I got wa in this problem. I need to figure the bug.

Code: Select all

#include<stdio.h>

char st[10][10];

int compare(int a_low,int b_low,int a,int b)
{
	bool repeat = 0,check[10] = {0};
	int i,j,num,count=0;
	for(i=a_low;i<a;i++)
	{
		for(j=b_low;j<b;j++)
		{
			if(st[i][j]!='0')
			{
				if(!check[st[i][j]-48])
					check[st[i][j]-48] = 1;
				else {repeat = 1;break;}
			}
		}
		if(repeat)break;
	}
	for(i=1;i<9;i++)
	{
		if(check[i]==0)
		{
			num = i;
			count++;
		}
	}
	if(count==1)
		return num;
	else return 0;
}

int check_box(int a,int b)
{
	int a_low,b_low;
	if(a<3&&b<3){a_low = 0;b_low = 0;a = 3;b = 3;return compare(a_low,b_low,a,b);}
	else if(a<3&&b<6){a_low = 0;b_low = 3;a = 3;b = 6;return compare(a_low,b_low,a,b);}
	else if(a<3&&b<9){a_low = 0;b_low = 6;a = 3;b = 9;return compare(a_low,b_low,a,b);}
	else if(a<6&&b<3){a_low = 3;b_low = 0;a = 6;b = 3;return compare(a_low,b_low,a,b);}
	else if(a<6&&b<6){a_low = 3;b_low = 3;a = 6;b = 6;return compare(a_low,b_low,a,b);}
	else if(a<6&&b<9){a_low = 3;b_low = 6;a = 6;b = 9;return compare(a_low,b_low,a,b);}
	else if(a<9&&b<3){a_low = 6;b_low = 0;a = 9;b = 3;return compare(a_low,b_low,a,b);}
	else if(a<9&&b<6){a_low = 6;b_low = 3;a = 9;b = 6;return compare(a_low,b_low,a,b);}
	else if(a<9&&b<9){a_low = 6;b_low = 6;a = 9;b = 9;return compare(a_low,b_low,a,b);}
}

int check_row(int a,int b)
{
	bool check[10]={0},repeat=0;
	int i,num,count=0;
	for(i=0;i<9;i++)
	{
		if(st[a][i]!='0')
		{
			if(!check[st[a][i]-48])
				check[st[a][i]-48] = 1;
			else {repeat = 1;break;}
		}
	}
	if(repeat)return 0;
	for(i=1;i<9;i++)
	{
		if(check[i]==0&&i!=b)
		{
			num = i;
			count++;
		}
	}
	if(count==1)
		return num;
	else return 0;
}

int check_col(int a,int b)
{
	bool check[10]={0},repeat = 0;
	int i,num,count=0;
	for(i=0;i<9;i++)
	{
		if(st[i][a]!='0')
		{
			if(!check[st[i][a]-48])
				check[st[i][a]-48] = 1;
			else {repeat = 1;break;}
		}
	}
	if(repeat)return 0;
	for(i=1;i<9;i++)
	{
		if(check[i]==0&&i!=a)
		{
			num = i;
			count++;
		}
	}
	if(count==1)
		return num;
	else return 0;
}

int main()
{
	bool found;
	int i,j,n,blank_x[6],blank_y[6],a,x,y,z,num;
	scanf("%d",&n);
	getchar();
	while(n--)
	{
		a=0;
		for(i=0;i<9;i++)
		{
			for(j=0;j<9;j++)
			{
				scanf("%c",&st[i][j]);
				if(st[i][j]=='0')
				{
					blank_x[a] = i;
					blank_y[a] = j;
					a++;
				}
			}
			getchar();
		}
		found = 1;
		for(i=0;i<a;i++)
		{
			x = check_box(blank_x[i],blank_y[i]);
			y = check_row(blank_x[i],blank_y[i]);
			z = check_col(blank_y[i],blank_y[i]);
			num = 0;
			if(x)num = x;
			else if(y)if((num&&num==y)||(!num&&y))num = y;
			else if(z)if((num&&num==z)||(!num&&z))num = z;
			if(!num)
			{
				puts("Could not complete this grid.");
				found = 0;
				break;
			}
			else
				st[blank_x[i]][blank_y[i]] = num+48;
		}
		if(found)
		{
			for(i=0;i<9;i++)
			{
				for(j=0;j<9;j++)
				{
					printf("%c",st[i][j]);
				}
				puts("");
			}
		}
	}
	return 0;
}