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public class Test1 {
public static void main(String[] args) {
String str = toAlphabet(702);
System.out.println(str);
}
public static String toAlphabet(int num) {
char[] chs = new char[7];
int offset = chs.length;
while(num > 0) {
int m = num % 26;
num /= 26;
if(m == 0) {
m = 26;
num--;
}
chs[--offset] = (char)(m + 'a' - 1);
}
return new String(chs, offset, chs.length - offset);
}
}