multimap<int,vector<int> >

#include<iostream>
#include<map>
#include<vector>
using namespace std;
int main(void){
    
    multimap<int,vector<int> > a;
    vector<int> s;
    s.push_back(10);
    s.push_back(20);
    s.push_back(30);
    a.insert({1,s});
    vector<int> b;
    b.push_back(40);
    b.push_back(50);
    b.push_back(60);
    a.insert({2,b});
    multimap<int,vector<int> > :: iterator iter;
    for(iter=a.begin();iter!=a.end();iter++)
    {
        cout<<iter->first<<' ';
        vector<int> &rhs=(*iter).second;
        for(int i=0;i<rhs.size();i++)
        {
            cout<<rhs[i]<<' ';
        }
        cout<<endl;
    }
    cout<<endl;
    
    for(iter=a.begin();iter!=a.end();iter++)
    {
        cout<<iter->first<<' ';
        for(int i=0;i<(*iter).second.size();i++)
        {
            cout<<(*iter).second[i]<<' ';
        }
        cout<<endl;
    }
    
    cout<<endl;
    
        for(iter=a.begin();iter!=a.end();iter++)
    {
        cout<<iter->first<<' ';
        for(int i=0;i<(*iter).second.size();i++)
        {
            cout<<iter->second[i]<<' ';
        }
        cout<<endl;
    }
    
    
    
    
    return 0;
    
}