@@ -0,0 +1,440 @@
+package leetcode;%0A%0A/**%0A * https://oj.leetcode.com/problems/excel-sheet-column-number/%0A */%0Apublic class Problem171 %7B%0A    public int titleToNumber(String s) %7B%0A        int n =  0;%0A        int exp = 0;%0A        for (int i = s.length()-1; i %3E= 0; i--) %7B%0A            n += getNumber(s.charAt(i)) * (int) Math.pow(26, exp);%0A            exp++;%0A        %7D%0A        return n;%0A    %7D%0A    %0A    private int getNumber(char c) %7B%0A        return c - 64;%0A    %7D%0A%7D%0A

Solve problem 171