#include <iostream>

using namespace std;

int main() {


	char input[300];


	cin.getline(input, 300);
	char firstNumber[100];
	int a = 2;
	while (input[a]!=' ')
	{
		firstNumber[a - 2] = input[a];
		a++;
	}
	int b = 0;
	firstNumber[a-2] = '\0';
	char secondNumber[100];
	while (input[a] != '\0')
	{
		secondNumber[b] = input[a];
		b++;
		a++;
	}
	secondNumber[b] = '\0';


	int counter1 = 0;
	while (firstNumber[counter1] != '\0')
	{
		counter1++;
	}

	int counter2 = 0;
	while (secondNumber[counter2] != '\0')
	{
		counter2++;
	}

	int arr1[100];
	int arr2[100];
	for (int i = 0; i < 100; i++)
	{
		arr1[i] = 0;
		arr2[i] = 0;
	}
	for (int i = 0; i < counter1; i++)
	{
		arr1[99 - i] = firstNumber[counter1 - i - 1] - '0';
	}
	for (int i = 0; i < counter2; i++)
	{
		arr2[99 - i] = secondNumber[counter2 - i - 1] - '0';
	}

	char operation=input[0];

	int result[300];
	for (int i = 0; i < 300; i++)
	{
		result[i] = 0;

	}

	if (operation == '+') {
		int max = 0;
		if (counter1 > counter2)
		{
			max = counter1;
		}
		else
		{
			max = counter2;
		}
		int temp = 0;
		int i = 99;
		for (; i > 99 - max; i--)
		{
			int a = arr1[i] + arr2[i] + temp;
			temp = a / 10;
			result[i] = a % 10;
		}
		if (temp != 0)
		{
			result[i] = temp;
		}
	}
	else if (operation == '-')
	{
		if (counter1 == counter1)
		{
			int temp = 0;
			int i = 99;
			for (; i > 99 - counter1; i--)
			{
				if ((arr1[i] - arr2[i]) < 0)
				{
					int tempI = i - 1;
					if (arr1[tempI] == 0)
					{
						while (arr1[i] == 0)
						{
							i--;
						}
						arr1[tempI]--;
						while (i - 1 != tempI)
						{
							tempI++;
							arr1[tempI] = 9;
						}
						result[i] = arr1[i] + 10 - arr2[i];
					}
					else
					{
						arr1[tempI]--;
						result[i] = arr1[i] + 10 - arr2[i];
					}

				}
				else
				{
					result[i] = arr1[i] - arr2[i];
				}

			}

		}
		else if (counter1 > counter2)
		{
			int temp = 0;
			int i = 99;
			for (; i > 99 - counter1; i--)
			{
				if (true)
				{
					if ((arr1[i] - arr2[i]) < 0)
					{


						int tempI = i - 1;
						if (arr1[tempI] == 0)
						{
							while (arr1[i] == 0)
							{
								i--;
							}
							arr1[tempI]--;
							while (i - 1 != tempI)
							{
								tempI++;
								arr1[tempI] = 9;
							}
							result[i] = arr1[i] + 10 - arr2[i];
						}
						else
						{
							arr1[tempI]--;
							result[i] = arr1[i] + 10 - arr2[i];
						}

					}
					else
					{
						result[i] = arr1[i] - arr2[i];
					}
				}
				else
				{
					result[i] = arr1[i];
				}
			}

		}
		else
		{
			int temp = 0;
			int i = 99;
			for (; i > 99 - counter2; i--)
			{
				if (true)
				{
					if ((arr2[i] - arr1[i]) < 0)
					{


						int tempI = i - 1;
						if (arr2[tempI] == 0)
						{
							while (arr2[i] == 0)
							{
								i--;
							}
							arr2[tempI]--;
							while (i - 1 != tempI)
							{
								tempI++;
								arr2[tempI] = 9;
							}
							result[i] = arr2[i] + 10 - arr1[i];
						}
						else
						{
							arr2[tempI]--;
							result[i] = arr2[i] + 10 - arr1[i];
						}

					}
					else
					{
						result[i] = arr2[i] - arr1[i];
					}
				}
				else
				{
					result[i] = arr2[i];
				}
			}

		}


	}
	else if (operation == '*')
	{
		int max = 0;
		int min = 0;
		int biggerOne = 0;
		if (counter1 > counter2)
		{
			max = counter1;
			min = counter2;
			biggerOne = 1;
		}
		else
		{
			min = counter1;
			max = counter2;
			biggerOne = 2;
		}
		int temp = 0;

		int tempArr2[300];
		int tempArr1[300];
		for (int i = 0; i < 300; i++)
		{
			tempArr1[i] = 0;

		}
		int i = 99;
		for (; i > 99 - max; i--)
		{
			for (int i = 0; i < 300; i++)
			{
				tempArr2[i] = 0;

			}

			if (biggerOne==1)
			{
				for (int j = 299; j > 299-(i-99); j--)
				{
					tempArr2[j] = 0;
				}
				int j = 299;
				for (; j > 299-min; j--)
				{
					int a = arr1[i] * arr2[j-200] + temp;
					temp = a / 10;
					tempArr2[j-(99-i)] = a % 10;
				}
				if (temp!=0)
				{
					tempArr2[j - (99 - i)]=temp;
				}
			}
			else
			{
				for (int j = 99; j < i - 99; j++)
				{
					tempArr2[j] = 0;
				}
				for (int j = 99 - min; j < 99; j++)
				{
					int a = arr1[i] * arr2[j] + temp;
					temp = a / 10;
					tempArr2[j + i] = a % 10;
				}

			}



			for (int i = 0; i < 300; i++)
			{
				tempArr1[i] = result[i];

			}
			int tempN = 0;
			for (int i=299; i > 0; i--)
			{
				int a = tempArr1[i] + tempArr2[i] + tempN;
				tempN = a / 10;
				result[i] = a % 10;
			}


		}
	}
	for (int i = 0; i < 300; i++)
	{
		if (result[i] >= 0 && result[i] <= 9)
		{
			cout << result[i];
		}
	}

	system("pause");
	return 0;
}