#include <stdio.h>

int main(void) {
    int n;
    int retry = 1;

    do {
        printf("Input integer: ");
        scanf("%d", &n);

        if (n > 0) {
	        printf("%d is positive.\n", n);
        } else if (n < 0) {
            printf("%d is negative.\n", n);
        } else {
            printf("It is zero.\n");
        }

        printf("Retry? [1/0]: ");
        scanf("%d", &retry);
    } while (retry == 1);

    return 0;
}