#include <iostream>
using namespace std;
 
const int MAX_LENGTH = 1000;
 
int main() {
	int n, v[MAX_LENGTH + 1];
    cin >> n;
    for (int i = 1; i <= n; ++i) {
        cin >> v[i];
    }
    for (int i = 1, odd = 1, even = 2; i <= n; ++i) {
        if (i == odd) {
            v[i] -= 1;
            odd += 2;
        } else if (i == even) {
            v[i] *= 2;
            even += 2;
        }
        cout << v[i] << " ";
    }
	return 0;
}

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NwoxIDAgLTIgMyAyIC0zIDU=

7
1 0 -2 3 2 -3 5