1048. 数字加密(20)

b1048.cpp

#include<iostream>
#include <vector>
#include <string>
using namespace std;

int main()
{
	string A, B;
	cin >> A >> B;

	vector<char> result;
	string pattern = "0123456789JQK";
	auto jishu = true;
	do
	{
		int a, b;
		if (A.empty())
		{
			a = 0;
		}
		else
		{
			a = A.back() - '0';
			A.pop_back();
		}
		if (B.empty())
		{
			b = 0;
		}
		else
		{
			b = B.back() - '0';
			B.pop_back();
		}


		if (jishu)
		{
			auto t = (a + b) % 13;
			result.push_back(pattern[t]);
		}
		else
		{
			auto t = b - a;
			if (t < 0)
				t += 10;
			result.push_back(pattern[t]);
		}
		jishu = !jishu;
	}
	while (A.size() != 0 || B.size() != 0);

	for (auto i = result.crbegin(); i != result.crend(); ++i)
		cout << *i;

	cout << endl;
	return 0;
}