看了之前的讨论，测试点

2
R228C494
R98C702

我输出的是

RZ228
ZZ98

好像是对的吧？

代码：

#include <iostream>
#include <cstring>
#include <stack>

int n;
std:: string s;
std:: stack<int> t;

inline bool check()
{
	if (s[0] != 'R') return false;
	else if (s[1] < '0' || s[1] > '9') return false;
	else
		{
			for (int i = 2; i < s.size(); ++i)
				if (s[i] == 'C') return true;
			return true;
		}
}

int main()
{
	
	std:: cin >> n;
	for (int i = 1; i <= n; ++i)
		{
			std :: cin >> s;
			if (check())
				{
					int i = 1, r = 0, c = 0;
					for (; s[i] >= '0' && s[i] <= '9'; ++i) r = (r << 3) + (r << 1) + (s[i] ^ 48);
					for (++i; s[i] >= '0' && s[i] <= '9'; ++i) c = (c << 3) + (c << 1) + (s[i] ^ 48);
					for (; c; c = (c + 25) / 26 - 1) t.push((c - 1) % 26 + 1);
					for (; !t.empty(); t.pop()) printf("%c", t.top() + 64);
					printf("%d\n", r);
				}
			else
				{
					int i = 0, r = 0, c = 0;
					for (; s[i] >= 'A' && s[i] <= 'Z'; ++i) c = (c << 4) + (c << 3) + (c << 1) + (s[i] - 64);
					for (; s[i] >= '0' && s[i] <= '9'; ++i) r = (r << 3) + (r << 1) + (s[i] ^ 48);
					printf("R%dC%d\n", r, c);
				}
		}
	
	return 0;
}