#include <stdio.h>

void int2bin(char n){
    int i, printed=0, c;

    for(i=8; i>=0; i--){
        c = (n>>i) & i;
        if(printed || c || !i)
            printf("%d", c), printed=1;
    }
}

int main(){
    int2bin(123);
    printf("\n");
    return 0;
}