View Code of Problem 22

#include<iostream>
#include<vector>
#include<cstring>
#include<cstdio>
#include<algorithm>
#include<cmath>
#include<string>
using namespace std;

int main()
{
	string s1, s2;
	int num[26], num1[26];
	
	while(cin >> s1>> s2)
	{
		memset(num, 0, sizeof(num));
		memset(num1, 0, sizeof(num1));
		for (int i = 0;i < s1.size();i++)
		{
			num[s1[i] - 'a']++;
		}
		for (int i = 0;i < s2.size();i++)
		{
			num1[s2[i] - 'a']++;
		}
		for (int i = 0;i < 26;i++)
		{
			while (num[i] != 0 && num1[i] != 0)
			{
				printf("%c", i + 'a');
				num[i]--;
				num1[i]--;
			}
		}
		printf("\n");
	}
}