题解 | #找出字符串中第一个只出现一次的字符#
找出字符串中第一个只出现一次的字符
https://www.nowcoder.com/practice/e896d0f82f1246a3aa7b232ce38029d4
using System;
using System.Linq;
namespace HJ59
{
internal class Program
{
static void Main(string[] args)
{
string inputStr = Console.ReadLine();
var chars = inputStr.Where(c => inputStr.Count(x => x == c) == 1);
if (chars.Any())
{
Console.WriteLine(chars.ElementAt(0));
return;
}
Console.WriteLine(-1);
}
}
}
