C

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */

/*
 * File:   main.cpp
 * Author: maxim
 *
 * Created on May 31, 2016, 8:26 PM
 */

#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;

bool cmp(vector<int> a, vector<int> b) {
    if(a.size() == b.size()) {
        return a < b;
    } else {
        return a.size() < b.size();
    }
}

int main(int argc, char** argv) {
    vector<int> a1{1};
    vector<int> a2{1, 2};
    vector<int> a3{1, 2, 3};
    vector<int> a4{2, 3};
    vector<int> a5{5, 6};
    vector<vector<int> > v{a1, a2, a3, a4, a5};
    sort(v.begin(), v.end(), cmp);
    for(int i = 0; i < 5; ++i) {
        for(int j = 0; j < v[i].size(); ++j) {
            cout << v[i][j] << ' ';
        }
        cout << endl;
    }
}