#include<stdio.h>
int main(){
int n;
scanf("%d",&n);
for (n=i;n<0;i++){
    for(n=j;n<i-1;j++){
        printf("Invalid input");
    }
}
if(n<0){
    printf("lined number");
}
for i in range(n<0){
    for j in range(n<i){
        if not in range {
            print(" ")
        }
    }
    if (1<=n<=1000){
        printf("not found");
    }
    else
        printf("-1")
}
return 0;
}