#include "iostream"
#include "vector"
#include "algorithm"

using namespace std;

struct C
{
    int a;
    vector<int> v;

    // 從小到大排
    bool operator < (const struct C &c) const
    {
        return v < c.v;
    }
};

int main()
{
    C c;
    for(int i=0; i<3; i++)
        c.v.push_back(i);
    c.a = 10
 
;

    C d;
    d = c;
    for(int j=0; j<3; j++)
        cout << d.v[j] << " ";
    cout << endl << d.a << endl << endl;

    C e;
    e.v.push_back(2);
    e.a = 11;
    e = c;
    for(j=0; j<3; j++)
        cout << d.v[j] << " ";
    cout << endl << d.a << endl;

    return
 
 0;
}