题目:
题解:
Go
func convertToTitle(columnNumber int) string {
ans := []byte{}
for columnNumber > 0 {
columnNumber--
ans = append(ans, 'A'+byte(columnNumber%26))
columnNumber /= 26
}
for i, n := 0, len(ans); i < n/2; i++ {
ans[i], ans[n-1-i] = ans[n-1-i], ans[i]
}
return string(ans)
}