// editor5
#include <stdio.h>

int main() {
    int n;
    // Read n and validate constraints
    if (scanf("%d", &n) != 1 || n < 1 || n > 100) {
        printf("Invalid input\n");
        return 1; // Exit with error code
    }

    int arr; // Declare array of size n
    for (int i = 0; i < n; i++) {
        // Read each element and validate input
        if (scanf("%d", &arr[i]) != 1) {
            printf("Invalid input\n");
            return 1; // Exit with error code
        }
    }

    // Update values at even indices (0-based)
    for (int i = 0; i < n; i += 2) {
        arr[i] += 10;
    }

    // Print the updated array
    for (int i = 0; i < n; i++) {
        printf("%d", arr[i]);
        if (i < n - 1) {
            printf(" "); // Print space between numbers
        }
    }
    printf("\n"); // Print a newline at the end

    return 0; // Indicate successful execution
}