#include <iostream>
#include <bits/stdc++.h>
using namespace std;

int main() {
	vector<int> nulinashti;
	vector<int> ertinshti;
	vector<int> orinashti;
	for(int i=1; i<31; i++){
		if(i % 3 == 0){
	nulinashti.push_back(i);
		}if(i % 3 ==1){	
		ertinshti.push_back(i);
		}if(i % 3 ==2){
		orinashti.push_back(i);
		}
		
	}	
	// your code goes here
	return 0;
}