#include <iostream>
#include <vector>

using namespace std;

void vectorMax(vector<int>);


int main() {
	vector<int> vec{ 1,2,3,6,4,8,7,9,4 };
	vectorMax(vec);
}

void vectorMax(vector<int> vec) {
	int max = vec[0];
	for (int i = 0; i < vec.size(); i++) {
		if (vec[i] % 3 == 0 && vec[i] >= max) {
			max = vec[i];

		}
		else if (vec[i] % 3 == 0) {
			cout << "vec[" << i << "] = " << vec[i] << endl;
		}
		else {
			cout << "vec[" << i << "] = ara " << endl;
		}
	}
	cout << max << endl;
}