题解 | 变幻莫测

#include <stdio.h>

int main(void) {
    unsigned x, y;
    scanf("%u%u", &x, &y);

    if(x == y)
        printf("0");
    else if(x != y && y == 0)
        printf("1");
    else if(x != y && x == 0)
        printf("2");
    else if(x == -y)
        printf("3");
    else
        printf("-1");

    return 0;
}