【美团】被7整除（70%），关灯（100%）

#include <iostream>
using namespace std;

bool judge(long long a, long long b,long long ten)
{
	long long ret = a % 7;
	long long sum = ret*ten + b;
	bool sta = false;
	if (sum % 7 == 0)
		sta = true;
	return sta;
}

int main()
{
	int length, n;
	while (cin >> length)
	{
		long long *data = new long long[length];
		long long *ten = new long long[length];
		data[0] = 1;
		ten[1] = 1;
		for (int i = 0; i < length; i++)
			cin >> data[i];
		
		for (int i = 0; i < length; i++)
		{
			long long tend = 1, tmp = data[i];
			while (tmp != 0)
			{
				tmp /= 10;
				tend *= 10;
			}
			ten[i] = tend;
		}

		long long cnt = 0;
		for (int i = 0; i < length - 1; i++)
		{
			for (int j = i + 1; j < length; j++)
			{
				if (true == judge(data[i], data[j], ten[j]))
					++cnt;
				if (true == judge(data[j], data[i], ten[i]))
					++cnt;
			}
		}
		cout << cnt << endl;
		delete data;
		delete ten;
	}
	return 0;
}

#include <iostream>
using namespace std;
int main()
{
	int length, n;
	while (cin >> length)
	{
		for (int i = 0; i < length; i++)
			cin >> n;
		if (n == 1)
			cout << "Alice" << endl;
		else
			cout << "Bob" << endl;
	}
	return 0;
}