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168. Excel Sheet Column Title (Math)
Given a positive integer, return its corresponding column title as appear in an Excel sheet.
For example:
1 -> A
2 -> B
3 -> C
...
26 -> Z
27 -> AA
28 -> AB
class Solution { public: string convertToTitle(int n) { //residue is the value of current bit (from least-significant bit) //divided by 26, then iterate int residue = n%26, quotient=n; string ret = ""; while(quotient>0){ if(residue==0) { residue = 26; quotient -= 1; } ret = (char)(‘A‘+residue-1) + ret; quotient /= 26; residue = quotient %26; } return ret; } };
168. Excel Sheet Column Title (Math)
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