#include <stdio.h>
void swap(int *a, int *b) {
    int temp = *a;
    *a = *b;
    *b = temp;
}

int main() {
    int x, y;
    scanf("%d", &x);
    scanf("%d", &y);

    if (x <-100 || y >100) {
        printf("Invalid Input\n");
    } else {
        swap(&x, &y);
        printf("%d\n%d\n", x, y);
    }

    return 0;
}

4
#include <stdio.h>

int main() {
    int n;
    scanf("%d", &n);

    if (n < 1) {
        printf("Invalid Input\n");
        return 0;
    }

    for (int i = 1; i <= n; i++) {
        int pentagonal = i * (3 * i - 1) / 2;
        printf("%d\n", pentagonal);
    }

    return 0;
}