Lukuvälit

input/code.cpp:26:3: warning: integer constant is so large that it is unsigned
   10'000'000'000'000'000'000
   ^~~~~~~~~~~~~~~~~~~~~~~~~~
input/code.cpp: In function 'int main()':
input/code.cpp:77:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    if(a%powsOf10[i] == a)
       ~~~~~~~~~~~~~~^~~~
input/code.cpp:86:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    if (b % powsOf10[i] == b)
        ~~~~~~~~~~~~~~~~^~~~
input/code.cpp:109:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
      if (a < (powsOf10[omA] + temp))
          ~~^~~~~~~~~~~~~~~~~~~~~~~~
input/code.cpp:123:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
      if (a < (powsOf10[omA] + temp))
          ~~^~~~~~~~~~~~~~~~~~~~~~~~
input/code.cpp:145:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
      if (b <...

#include<iostream>

int main()
{
	unsigned long long powsOf10[20]
	{
		1,
		10,
		100,
		1'000,
		10'000,
		100'000,
		1'000'000,
		10'000'000,
		100'000'000,
		1'000'000'000,
		10'000'000'000,
		100'000'000'000,
		1'000'000'000'000,
		10'000'000'000'000,
		100'000'000'000'000,
		1'000'000'000'000'000,
		10'000'000'000'000'000,
		100'000'000'000'000'000,
		1'000'000'000'000'000'000,
		10'000'000'000'000'000'000
	};

	unsigned long long ones[19]
	{
		1,
		11,
		111,
		1'111,
		11'111,
		111'111,
		1'111'111,
		11'111'111,
		111'111'111,
		1'111'111'111,
		11'111'111'111,
		111'111'111'111,
		1'111'111'111'111,
		11'111'111'111'111,
		111'111'111'111'111,
		1'111'111'111'111'111,
		11'111'111'111'111'111,
		111'111'111'111'111'111,
		1'111'111'111'111'111'111
	};

	int n;
	std::cin >> n;

	long long a;
	long long b;
	long long temp1;
	long long temp;

	int toA = 0;
	int toB = 0;
	int between;

	int omA = 0;
	int omB = 0;

	bool aMidRange = false;
	bool bMidRange = false;

	for (int i = 0; i < n; i++)
	{
		std::cin >> a;
		std::cin >> b;

		for (int i = 0; i < 20; i++)
		{
			if(a%powsOf10[i] == a)
			{
				omA = i - 1;
				break;
			}
		}

		for (int i = 0; i < 20; i++)
		{
			if (b % powsOf10[i] == b)
			{
				omB = i - 1;
				break;
			}
		}

		if (a == 0)
			toA = 1;
		else
		{
			toA = 2 << omA;

			if (omA == 0)
			{
				for (int i = 0; i < 2; i++)
				{
					temp = 0;
					for (int j = 0; j < omA; j++)
					{
						temp += powsOf10[j] * (i >> j & 1);
					}

					if (a < (powsOf10[omA] + temp))
						toA--;
				}
			}
			else
			{
				for (int i = 0; i < (2 << (omA - 1)); i++)
				{
					temp = 0;
					for (int j = 0; j < omA; j++)
					{
						temp += powsOf10[j] * (i >> j & 1);
					}

					if (a < (powsOf10[omA] + temp))
						toA--;
				}
			}
		}

		if (b == 0)
			toB = 1;
		else
		{
			toB = 2 << omB;

			if (omB == 0)
			{
				for (int i = 0; i < 2; i++)
				{
					temp = 0;
					for (int j = 0; j < omB; j++)
					{
						temp += powsOf10[j] * (i >> j & 1);
					}

					if (b < (powsOf10[omB] + temp))
						toB--;
				}
			}
			else
			{
				for (int i = 0; i < (2 << (omB-1)); i++)
				{
					temp = 0;
					for (int j = 0; j < omB; j++)
					{
						temp += powsOf10[j] * (i >> j & 1);
					}

					if (b < (powsOf10[omB] + temp))
						toB--;
				}
			}
		}

		aMidRange = ((powsOf10[omA] <= a) && (a <= ones[omA]));
		if (a == 0 || a == 1)
			aMidRange = true;

		bMidRange = ((powsOf10[omB] <= b) && (b <= ones[omB]));
		if (b == 0 || b == 1)
			bMidRange = true;

		if (a == b)
		{
			if (aMidRange)
				between = 1;
			else
				between = 0;
		}
		else if (toA == toB)
		{
			if (!aMidRange && !bMidRange)
				between = 0;
			else
				between = toB - toA + 1;
		}
		else
		{
			if (!aMidRange && !bMidRange)
				between = toB - toA;
			else
				between = toB - toA + 1;
		}

		std::cout << between << '\n';
	}

	return 0;
}