Division(简单枚举)

  Division 
Write a program that finds and displays all pairs of 5-digit numbers that between them use the digits 0 through 9 once each, such that the first number divided by the second is equal to an integer N, where 
. That is,

abcde / fghij = N

where each letter represents a different digit. The first digit of one of the numerals is allowed to be zero.

Input 

Each line of the input file consists of a valid integer N. An input of zero is to terminate the program.


Output 

Your program have to display ALL qualifying pairs of numerals, sorted by increasing numerator (and, of course, denominator).


Your output should be in the following general form:

xxxxx / xxxxx = N
xxxxx / xxxxx = N
.
.

In case there are no pairs of numerals satisfying the condition, you must write ``There are no solutions for N.". Separate the output for two different values of N by a blank line.

Sample Input 

61
62

0


Sample Output 

There are no solutions for 61.

79546 / 01283 = 62

94736 / 01528 = 62


我用了两种方法:

///用循环写,代码较长,需要注意的地方也很多。
#include
#include
int main()
{
    int n,i,j,k,l,t,o,p,ans,h;
    int b[10]= {0};
    int lu[10]= {0};
    int pp=0;
    while(~scanf("%d",&n)&&n)
    {
        int kk=0;

        if(pp)printf("\n");///除了第一个n之外,每输出一个n后面都要输出一行空格;
        pp++;

        for(i=0; i<=9; i++) ///找第一个数;
        {
            ans=i;

            for(j=0; j<=9; j++) ///找第二个数;
            {
                if(j==i)continue;///不能和已找到的数相同;
                ans=ans*10+j;

                for(k=0; k<=9; k++) ///找第三个数;
                {
                    if(k==i||k==j)continue;///不能和已找到的数相同;
                    ans=ans*10+k;

                    for(l=0; l<=9; l++) ///找第四个数;
                    {
                        if(l==i||l==j||l==k)continue;///不能和已找到的数相同;
                        ans=ans*10+l;

                        for(t=0; t<=9; t++) ///找第五个数;
                        {
                            if(t==i||t==j||t==k||t==l)continue;///不能和已找到的数相同;
                            ans=ans*10+t;

                            if(ans%n==0)///如果是n的倍数就观察两数之商是否符合条件;
                            {
                                p=ans/n;
                                int f=0;
                                for(h=0; h<5; h++)
                                {
                                    o=p%10;
                                    if(o==i||o==l||o==j||o==k||o==t||lu[o])///不能和已找到的数相同;
                                    {
                                        f=1;///不符合条件将lu和b初始化;
                                        memset(lu,0,sizeof(lu));
                                        memset(b,0,sizeof(b));
                                        break;
                                    }
                                    lu[o]=1;
                                    p=p/10;
                                    b[h]=o;
                                }
                                if(f)
                                {
                                    ans/=10;///返回上个ans值;
                                    continue;
                                }
                                else///符合条件输出,别忘了初始化;
                                {
                                    kk=1;
                                    printf("%d%d%d%d%d / %d%d%d%d%d = %d\n",i,j,k,l,t,b[4],b[3],b[2],b[1],b[0],n);
                                    memset(lu,0,sizeof(lu));
                                    memset(b,0,sizeof(b));
                                }
                            }
                            ans/=10;///返回上个ans值;
                        }
                        ans/=10;///返回上个ans值;
                    }
                    ans/=10;///返回上个ans值;
                }
                ans/=10;///返回上个ans值;
            }
        }

        if(!kk)printf("There are no solutions for %d.\n",n);///没有答案时;
    }
}

///遍历最小值到最大值;
#include
#include
int main()
{
    int n,i,j,f;
    int pp=0,p,lu[16]={0},a[10]={0},b[10]={0};
    while(~scanf("%d",&n)&&n)
    {

        if(pp)printf("\n");
        pp=1;
        int ll=0;
        for(i=1234;i<=98765;i++)///从最小值到最大值;
        {
            if(i*n>98765)break;
            p=i*n;
            int k=i;
            int qq=0;
            for(j=0;j<5;j++)
            {
                a[j]=k%10;
                k/=10;
                if(lu[a[j]])///有重复值时不符合条件,初始化数组;
                {
                    qq=1;
                    memset(a,0,sizeof(a));
                    memset(b,0,sizeof(b));
                    memset(lu,0,sizeof(lu));
                    break;
                }
                lu[a[j]]=1;
            }
            if(qq)continue;
            f=0;
            for(j=0;j<5;j++)
            {
                b[j]=p%10;
                p/=10;
                if(lu[b[j]])///有重复值时不符合条件,初始化数组;
                {
                    f=1;
                    memset(a,0,sizeof(a));
                    memset(b,0,sizeof(b));
                    memset(lu,0,sizeof(lu));
                    break;
                }
                lu[b[j]]=1;
            }
            if(!f)///找到符合条件值时输出,初始化数组;
            {
                ll=1;
                printf("%d%d%d%d%d / %d%d%d%d%d = %d\n",b[4],b[3],b[2],b[1],b[0],a[4],a[3],a[2],a[1],a[0],n);
                memset(a,0,sizeof(a));
                memset(b,0,sizeof(b));
                memset(lu,0,sizeof(lu));
            }
        }
        if(!ll)printf("There are no solutions for %d.\n",n);///没有结果时;
    }
}


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