pairの配列を作りたい

hoge2.cpp

#include <iostream>
#include <utility>
#include <algorithm>
#include <vector>


using namespace std;

const int N = 5;
int main(int argc, char const *argv[])
{
	pair<int, int> areas[N*N];

	for (int i = 0; i < N; ++i)
	{
		for (int j = 0; j < N; ++j)
		{
			pair<int, int> p;
			p.first = i * i + j * j;
			p.second = i;
			areas[i * N + j] = p;
		}
	}

	for (int i = 0; i < N * N; ++i)
	{
		cout << areas[i].first << endl;
	}
	
	return 0;
}