#include <stdio.h>

int Count_one(int binary_number){

    if(binary_number == 0) return 0;

    return Count_one(binary_number / 10) + binary_number % 10;

}

long long int HexadecimaltoDecimal(long long int hexadecimal_number, int power){

    if(hexadecimal_number == 0) return 0;

    return HexadecimaltoDecimal(hexadecimal_number / 10, power * 16) + hexadecimal_number % 10 * power;

}

long long int DecimaltoBinary(long long int n, int power){

    if(n == 0) return 0;

    return DecimaltoBinary(n / 2, power * 10) + n % 2 * power;

}

int main(){

    int time, num, b1, b2;

    long long int X1, X2;

    scanf("%d", &time);

    for(int i = 0;i < time;i++){

        scanf("%d",&num);

        X1 = DecimaltoBinary(num, 1);

        b1 = Count_one(X1);

        printf("X1=%lld\n",X1);  //為了看為什麼錯，而加上的

        X2 = DecimaltoBinary(HexadecimaltoDecimal(num, 1), 1);

        b2 = Count_one(X2);

        printf("X2=%lld\n", X2); //為了看為什麼錯，而加上的

        printf("%d %d\n", b1, b2);

    }

    return 0;

}

    return DecimaltoBinary(n / 2, power * 10) + n % 2 * power;

這裡溢位了，power太大，int裝不下