#include <iostream>
#include <vector>
#include <string>
#include <map>
#include <cmath>
using namespace std;
 
string beggest(const vector<int> &num)
{
	multimap<size_t, string> mp;
 
	for(auto i=0; i<num.size(); ++i){
		string str=to_string(num[i]);
		cout << str << ' ' << (int)num[i]/(int)pow(10, str.length()-1) << endl;
		//size_t n=num[i]%pow(10, str.length()-1);
		//cout << n;
		//mp[i%pow(10, str.length()-1)]=str;
	}
 
	//for(auto i:mp)
	//	cout << i->first << ' ';
 
	return string();
}
 
int main() {
	vector<int> a({3,30,34,5,9});
	string s=beggest(a);
 
	//cout << 30%10;
 
	return 0;
}

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