In c#:

using System;

public class Solution { private static int SUNDAY = 0;

public static void Main(string[] args)
{
    int t = Convert.ToInt32(Console.ReadLine());
    while (t-- > 0)
    {
        // input
        long[,] dateArray = new long[2, 3];
        for (int i = 0; i < 2; i++)
        {
            string[] input = Console.ReadLine().Split(' ');
            for (int j = 0; j < 3; j++)
            {
                dateArray[i, j] = Convert.ToInt64(input[j]);
            }
        }
        // begin
        Adjust(ref dateArray);
        //
        long ak = 0;
        while (true)
        {
            if (dateArray[0, 2] == 1)
            {
                if (Verify(dateArray[0, 0], dateArray[0, 1], dateArray[0, 2]))
                {
                    ak++;
                }
            }
            // set date
            dateArray[0, 2] = 1;
            // month plus 1
            dateArray[0, 1]++;
            if (dateArray[0, 1] > 12)
            {
                dateArray[0, 1] = 1;
                dateArray[0, 0]++;
            }
            if (OverDate(dateArray))
            {
                break;
            }
        }
        Console.WriteLine(ak);
    }
}

/**
 * check if dateArray[0] is later than dateArray[1]
 * @param dateArray
 * @return
 */
private static bool OverDate(long[,] dateArray)
{
    if (dateArray[0, 0] > dateArray[1, 0])
    {
        return true;
    }
    else if (dateArray[0, 0] == dateArray[1, 0])
    {
        if (dateArray[0, 1] > dateArray[1, 1])
        {
            return true;
        }
        else if (dateArray[0, 1] == dateArray[1, 1])
        {
            if (dateArray[0, 2] > dateArray[1, 2])
                return true;
        }
    }
    return false;
}

/**
 * let a[0] be earlier than a[1]
 * @param dateArray
 */
private static void Adjust(ref long[,] dateArray)
{
    if (OverDate(dateArray))
    {
        Exchange(ref dateArray);
    }
}

/**
 * exchange two input date
 * @param dateArray
 */
private static void Exchange(ref long[,] dateArray)
{
    long[] tmp = new long[3];
    tmp = new long[3] { dateArray[1, 0], dateArray[1, 1], dateArray[1, 2] };
    dateArray[1, 0] = dateArray[0, 0];
    dateArray[1, 1] = dateArray[0, 1];
    dateArray[1, 2] = dateArray[0, 2];
    dateArray[0, 0] = tmp[0];
    dateArray[0, 1] = tmp[1];
    dateArray[0, 2] = tmp[2];
}

private static bool Verify(long year, long month, long day)
{
    // w=(y + (y / 4) + (c / 4) - (2 * c) + ((26 * (month + 1)) / 10) + day - 1) % 7
    // long sourceY = year;
    // long sourceM = month;
    if (month < 3)
    {
        month += 12;
        year -= 1;
    }
    long c = year / 100;
    long y = year % 100;
    int w = (int)((y + (y / 4) + (c / 4) - (2 * c) + ((26 * (month + 1)) / 10) + day - 1) % 7);
    bool t = w == SUNDAY;
    // if (t) {
    // Console.WriteLine(sourceY + "-" + sourceM + "-" + day);
    // }
    return t;
}

}