题解

#include<iostream>
using namespace std;
int tong[30001];
int n,m,tmp;
int main(){
	cin>>n>>m;
    for(int i=1;i<=n+m;i++){
        cin>>tmp;
        tong[tmp]++;
    }
    for(int i=0;i<=30000;i++)
        for(int j=1;j<=tong[i];j++)
            cout<<i<<" ";
	return 0;
}

by QFIT