using System;
public class Test
{
public static void Main()
{
Console.Write("输入年份:");
int year = int.Parse(Console.ReadLine());
bool isLeap = (year % 4 == 0) && (year % 100 != 0);
Console.WriteLine($"{year}年{(isLeap ? "是" : "不是")}闰年");
}
}
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