#include<stdio.h>
int main (){
    int n=-9;
    switch(n>0){
        case 1 :
        printf("Positive number ");
        break;
        case 0:
        switch(n<0){
            case 1:
            printf("Negative number ");
            break;
             
             case 0:
             printf("Zero number  ");
            
        }
         break;
    }
}