Second minimum (version 1)

#include <iostream>

using namespace std;

int main() {
    int n;
    cin >> n;
    int a[100];
    for (int i = 0; i < n; i++) {
        cin >> a[i];
    }
    int min_number = a[0];
    int min_number_2 = -1;
    for (int i = 1; i < n; i++) {
        if (min_number >= a[i]) {
            min_number_2 = min_number;
            min_number = a[i];
        } else if (min_number_2 == -1 || min_number_2 > a[i]) {
            min_number_2 = a[i];
        }
    }
    cout << min_number_2 << "\n";
}