#include<stdio.h>
void convertToTitle(int n)
{
    while(n>0)
    {
        int remainder=(n-1)%26;
        printf("%n",'A' + remainder);
        n=(n-1)/26;
    }
}
int main()
{
    int n;
    printf("enter a column number: ");
    scanf("%d", &n);
    convertToTitle(n);
    printf("\n");
    return 0;
}