Problem:Given a positive integer, return its corresponding column title as appear in an Excel sheet.
MS Excel columns has a pattern like A, B, C, … ,Z, AA, AB, AC,…. ,AZ, BA, BB, … ZZ, AAA, AAB ….. etc.
In other words, column 1 is named as “A”, column 2 as “B”, column 27 as “AA”.
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#include <stdio.h> #include <string.h> #include <string> #include <iostream> using namespace std; int main() { //code int t,i; char c; string p,prev; long long n,a; scanf("%d",&t); while(t--) { scanf("%lld",&n); p=""; prev=""; a=n; while(a) { i=a%26; a/=26; if(i) c=char(i+64); else { c='Z'; a-=1; } p=c; p.append(prev); prev=p; } cout<<p<<"\n"; } return 0; } |