p01.cpp 178 Bytes
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#include <iostream>

using namespace std;

int main()
{
	res = 0;

	for (int i = 10; i > 0; i--)
	{

		if (i % 3 == 0 || i % 5)
		{
			res += i;
		}

	}

	cout << res << endl;

}