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谢谢分享

Posted by lisency at 2012-04-06 18:28:14 on Problem 2676
In Reply To:我觉得我的代码 ,挺好看的,贴出来晒晒。 Posted by:104GOGO at 2011-07-11 12:02:54
> #include<stdio.h>
> #include<string.h>
> 
> int map[10][10],ar[80][2],used1[10][10],used2[10][10];
> 
> int judge(int j,int k,int i)//宫,j/3*3很巧妙啊
> {
> 	int p,q;
> 	for(p=j/3*3;p<=j/3*3+2;p++)
> 	{
> 		for(q=k/3*3;q<=k/3*3+2;q++)
> 		{
> 			if(map[p][q]==i)return 0;
> 		}
> 	}
> 	return 1;
> }
> 
> int dfs(int num)//0的个数
> {
> 	int i,j,k;
> 	j=ar[num][0],k=ar[num][1];
> 	if(num<0)return 1;
> 	for(i=0;i<9;i++)//填数
> 	{
> 		if(judge(j,k,i+1)&&!used1[j][i]&&!used2[k][i])//if这后面熟悉不?
> 		{
> 			used1[j][i]=used2[k][i]=1;
> 			map[j][k]=i+1;
> 			if(dfs(num-1))return 1;
> 			used1[j][i]=used2[k][i]=0;
> 			map[j][k]=0;
> 		}
> 	}
> 	return 0;
> }
> 
> int main()
> {
> 	int i,j,T,num;
> 	char str[10];
> 	scanf("%d",&T);
> 	while(T--)
> 	{
> 		memset(used1,0,sizeof(used1));
> 		memset(used2,0,sizeof(used2));
> 		num=0;
> 		for(i=0;i<9;i++)
> 		{
> 			scanf("%s",str);
> 			for(j=0;j<9;j++)
> 			{
> 				map[i][j]=str[j]-'0';
> 				if(!map[i][j])//记录0的位置
> 				{
> 					ar[num][0]=i;
> 					ar[num][1]=j;
> 					num++;
> 				}
> 				if(map[i][j])used1[i][map[i][j]-1]=1;//记录第i行的数
> 			}
> 		}
> 		for(j=0;j<9;j++)
> 		{
> 			for(i=0;i<9;i++)
> 			{
> 				if(map[i][j])used2[j][map[i][j]-1]=1;//记录第j列的数
> 			}
> 		}
> 		dfs(num-1);
> 		for(i=0;i<9;i++)
> 		{
> 			for(j=0;j<9;j++)
> 				printf("%d",map[i][j]);
> 			printf("\n");
> 		}
> 	}
> 	return 0;
> }

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