Задача 1

#include <iostream>

int main() {
	int number;
	std::cin >> number;
	if (number % 3 == 0 && number % 10 == 7) {
		std::cout << "Yes";
	}
	else {
		std::cout << "NO";
	}
	return 0;
}

Задача 2

#include <iostream>

int main() {
	int number1, number2;
	std::cin >> number1 >> number2;
	if ((number1 / number2) % 2 == 0) {
		std::cout << "Yes";
	}
	else {
		std::cout << "NO";
	}
	return 0;
}

Задача 3

#include <iostream>
#include <vector>

int main() {
	std::vector<int> myVector;
	int number, sum = 0;
	while (true) {
		std::cin >> number;
		if (number != 0) {
			myVector.push_back(number);
		}
		else {
			break;
		}
	}

	for (auto i = myVector.begin(); i != myVector.end(); ++i) {
		if (*i % 6 == 0 && *i % 10 == 2) {
			sum += *i;
		}
	}

	std::cout << sum;
	return 0;
}

Задача 4

#include <iostream>

int main() {
	int *myArray;
	int arraySize, tmp;
	std::cin >> arraySize;
	myArray = new int[arraySize];
	for (int i = 0; i < arraySize; i++) {
		std::cin >> tmp;
		if (tmp % 2 == 0) {
			myArray[i] = tmp * 2;
		std::cout << myArray[i] << " ";
		}
		else {
			myArray[i] = tmp;
		}
	}
	return 0;
}