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#include "stdafx.h"

#include <vector>

#include <stack>

#include <algorithm>

#include <iostream>

#include <set>

#include <string>

#include "LeetCodeCppTest.h"

using namespace std;

class Solution {

public:

int titleToNumber(string s) {

int len = s.size();

int ret = 0;

//¾ÍÊÇ26½øÖÆ[1,26]ת10½øÖÆ

for (size_t i = 0; i < len; i++)

{

ret += (s[i] - 'A' + 1)*pow(26, len - i -1);

}

return ret;

}

};