#include <iostream>

using namespace std;

int main()
{
    int n;
    cin >> n;
    pair<int, int> p[n];
    for(int i = 0; i < n; i++) {
        cin >> p[i].first;
        p[i].second = i;
    }
    sort(p, p + n);
    for(int i = 0; i < n; i++) {
        cout << p[i].first << " " << p[i].second << endl;
    }
    return 0;
}