1037 Change at Hogwarts

#include <iostream>
using namespace std;
int main()
{
    
	int P[3], A[3];
	scanf("%d.%d.%d %d.%d.%d", &P[0], &P[1], &P[2], &A[0], &A[1], &A[2]);
	int R[3];
	for (int i = 0; i < 3; i++)
		R[i] = A[i] - P[i];
	while (!(R[2] >= 0 && R[2] < 29))
	{
    
		if (R[2] >= 29)
		{
    
			R[2] -= 29;
			R[1]++;
		}
		else if (R[2] < 0)
		{
    
			R[2] += 29;
			R[1]--;
		}
	}
	while (!(R[1] >= 0 && R[1] < 17))
	{
    
		if (R[1] >= 17)
		{
    
			R[1] -= 17;
			R[0]++;
		}
		else if (R[1] < 0)
		{
    
			R[1] += 17;
			R[0]--;
		}
	}
	if (R[0] < 0)
	{
    
		R[0]++;
		R[1] -= 17;
		R[1]++;
		R[2] -= 29;
	}
	if (R[0] < 0 || R[1] < 0 || R[2] < 0)
		printf("-%d.%d.%d", abs(R[0]), abs(R[1]), abs(R[2]));
	else
		printf("%d.%d.%d", R[0], R[1], R[2]);
}

Not perfect AC The answer , The reason may be the data range problem

#include <iostream>
using namespace std;
int main()
{
    
	//17*29 Nate (Knut) = 17* Sickles  (Sickle) =  Garonne (Galleon)
	long long int P1, P2, P3, A1, A2, A3;  // Galleon.Sickle.Knut
	scanf("%lld.%lld.%lld %lld.%lld.%lld", &P1, &P2, &P3, &A1, &A2, &A3);
	P3 = P1 * 17 * 29 + P2 * 29 + P3;
	A3 = A1 * 17 * 29 + A2 * 29 + A3;
	long long int difference = A3 - P3;
	bool flag;
	if (difference > 0)
		flag = true;
	else
		flag = false;
	difference = abs(difference);
	long long int D1, D2, D3;
	D3 = difference % 29;
	D2 = difference / 29;
	D1 = D2 / 17;
	D2 = D2 % 17;
	if (!flag)
		cout << "-";
	printf("%lld.%lld.%lld", D1, D2, D3);
}