View Code of Problem 22

#include <iostream>
#include <cstdio>
#include <cstring>
#include <algorithm>
using namespace std;
int main(){
    string s1,s2;
    char a[999];
    int k;
    while(getline(cin,s1)){
        getline(cin,s2);
        k=0;
        memset(a,0,sizeof(a));
        for(int i=0;i<s1.length();i++){
            for(int j=0;j<s2.length();j++){
                if(s1[i]==s2[j]){
                    a[k++]=s1[i];
                    s2[j]='*';
                    break;
                }
            }
        }
        sort(a,a+k);
        cout<<a<<endl;
    }
    return 0;
}