f291: 試算表大小

解題心得

AAA3 = AAA(col) * 3(row)

AAA = A * 26^2 + A * 26^1 + A

程式碼

#include<iostream>
#include<cmath>
using namespace std;

int main()
{
	string s;
	int col = 0, row = 0, base = 1;
	cin >> s;
	while (isdigit(s.back()))
	{
		row += base * (s.back() - '0');
		s.pop_back();
		base *= 10;
	}
	base = 0;
	for (int i = s.size() - 1; i >= 0; i--)
	{
		col += (s[i] - 'A' + 1) * pow(26, base);
		base++;
	}
	cout << col * row;
	return 0;
}