1  #include <stdio.h>

#define MAX 1000

int main() {
    int n;
    int sessionID[MAX], duration[MAX];

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

    for (int i = 0; i < n; i++) {
        if (scanf("%d %d", &sessionID[i], &duration[i]) != 2) {
            printf("Invalid input\n");
            return 0;
        }
    }

    printf("%d %d\n", sessionID[n - 1], duration[n - 1]);

    if (n == 1) {
        printf("Log is empty\n");
    } else {
        for (int i = 0; i < n - 1; i++) {
            printf("%d %d\n", sessionID[i], duration[i]);
        }
    }

    return 0;
}