感觉通熟易懂的方法，但无任何效率可言。。。。

#include <cstdio>
#include <cmath>
#include <iostream>
using namespace std;

int main() 
{
    int a , b, c , d , e , f;
    cin >> a >> b >> c;
    d = a;
    e = b;
    f = c;
    if(a > b) swap(a , b);
    if(a > c) swap(a , c);
    if(b > c) swap(b , c);
    printf("%d\n%d\n%d\n", a, b, c);
    printf("\n");
    printf("%d\n%d\n%d\n", d, e, f);
    return 0;
}