#include <stdio.h>

int main() {
    int N;
    if(scanf("%d", &N)) != 1 || N < 1 || N > 100) {
    printf("Invalid input\n");
    return 0;
}

int arr[N];
for (int i = 0; i < N; i++) {
    if (scanf("%d", &arr[i])  != 1) {
        printf("Invalid input\n");
        return 0;
    }
}

int *ptr = arr;
for (int i = 0; i < N; i++) {
    *(ptr + 1) *= 2;
}

for (int i = 0; i < N; i++) {
    printf("%d ", arr[i]);
}
printf("\n")

return 0;