백준/1000 ~
[백준 / C#] 1931 : 회의실 배정
무오_
2023. 7. 26. 21:27
using System;
using System.Linq;
class Program
{
static int n;
static int result = 1;
static void Input()
{
n = int.Parse(Console.ReadLine());
}
static void Solution()
{
int[][] meeting_time = new int[n][];
for (int i = 0; i < n; i++)
{
var input = Console.ReadLine().Split();
int[] copy = new int[2];
copy[0] = int.Parse(input[0]);
copy[1] = int.Parse(input[1]);
meeting_time[i] = copy;
}
// 가변배열 열정렬
IOrderedEnumerable<int[]> sortedBySecond = meeting_time.OrderBy(y => y[1]).ThenBy(y=> y[0]);
meeting_time = sortedBySecond.ToArray();
Compare(meeting_time, 0);
Console.WriteLine(result);
}
static void Compare(int[][] arr, int index)
{
int left = 0;
int right = 1;
while (right < n)
{
int[] leftArr = arr[left];
int[] nextArr = arr[right];
if (leftArr[1] > nextArr[0])
right++;
else
{
leftArr = nextArr;
left=right++;
result++;
}
}
}
static void Solve()
{
Input();
Solution();
}
static void Main(string[] args)
{
Solve();
}
}