暴力不解釋。

#include <vector>
#include <list>
#include <map>
#include <set>
#include <queue>
#include <string>
#include <deque>
#include <stack>
#include <algorithm>
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <limits.h>
#include <time.h>
#include <string.h>
using namespace std;

int lowbit(int t){return t&(-t);}
int countbit(int t){return (t==0)?0:(1+countbit(t&(t-1)));}
int gcd(int a,int b){return (b==0)?a:gcd(b,a%b);}
#define LL long long
#define PI acos(-1.0)
#define N  1010
#define MAX INT_MAX
#define MIN INT_MIN
#define eps 1e-8
#define FRE freopen("a.txt","r",stdin)

int main(){
    char s[30];
    char ss[30];
    int n;
    while(scanf("%s%d",s,&n)!=EOF){
        int i,j,k;
        int cnt;
        int len=strlen(s);
        int sum=0;
        for(i=0;i<len;i++)sum=sum*2+s[i]-'0';
        if( sum % n == 0){printf("%s\n",s);continue;}
        else k=( sum / n + 1 )*n;
        while(1){
            int cur=k;//
            cnt=0;
            while(cur){
                ss[cnt++]=cur%2+'0';
                cur>>=1;
            }
            //ss[cnt]='\0';
            int l=0,r=cnt-1;
            while(l<len && r>=0){
                if(s[l]==ss[r]){
                    l++;
                    r--;
                }
                else
                r--;
            }
            if(l>=len)break;
            k+=n;
        }
        for(i=cnt-1;i>=0;i--)
        printf("%c",ss[i]);
        puts("");
    }
    return 0;
}