#include <iostream>
using namespace std;
 int find_num_bit(int num){
    int i=0;
    while(num>0){
        i++;
        num=num>>1;
    }
    return i;
}

int main(){
	int num;
	int b_num;
	int i;
	for (num=1;num<=100;num++){
		printf("%d&3= %d -> ",num,num&3);
		int n=num&3;
		for (int c = 3; c >= 0; c--)
 		{
		    int k = n >> c;

		    if (k & 1)
		      printf("1");
		    else
		      printf("0");
  		}
		printf(" metto nello scan scan degli: ");
		switch (n){
			case 0: cout<<"00"; break;
			case 1: cout<<"01"; break;
			case 2: cout<<"10"; break;
			case 3: cout<<"11"; break;

		}
		cout<<endl;
		}
}