public static void main(String[] args) {
		int n=26;
		String s = convertToTitle(n);
		System.out.println(s);
	}
	public static  String convertToTitle(int n) {
		String str="";
		while(n>0){
			int num=(n-1)%26;
			str=(char)('A'+num)+str;
			n=(n-1)/26;
		}
		return str;
	}
 

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