PTA乙级题 1064. 朋友数(20)

#include<stdio.h>
int main()
{
    int i,j,n,s,temp,x=1;
    scanf("%d",&n);
    int a[n]={0},b[n]={0},c[n]={0};
    for (i=0;i<n;i++)
    scanf("%d",&a[i]);
    for (i=0;i<n;i++)
    {
        b[i]=0;
        while (a[i])
        {
            s=a[i]%10;
            b[i]+=s;
            a[i]/=10;
        }
    }
    for (i=0;i<n-1;i++)
    {
        for (j=0;j<n-i-1;j++)
        {
            if (b[j]>b[j+1])
            {
                temp=b[j];
                b[j]=b[j+1];
                b[j+1]=temp;
            }
        }
    }
    c[0]=b[0];
    for (i=1;i<n;i++)
    {
        if (b[i]!=b[i-1])
        {
            c[x]=b[i];
            x++;
        }
    }
    printf("%d\n",x);
    printf("%d",c[0]);
    for (i=1;i<x;i++)
    printf(" %d",c[i]);
    return 0;
}