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Merge pull requestneetcode-gh#1052 from agnihotriketan/patch-16

Create 253-Meeting-Rooms-II.cs

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	`1`	`+publicclassSolution{`
	`2`	`+publicintMinMeetingRooms(int[][]intervals){`
	`3`	`+if(intervals==null\|\|intervals.Length==0)`
	`4`	`+return0;`
	`5`	`+`
	`6`	`+intresult=0;`
	`7`	`+int[]start=newint[intervals.Length],end=newint[intervals.Length];`
	`8`	`+`
	`9`	`+for(inti=0;i<intervals.Length;i++)`
	`10`	`+{`
	`11`	`+start[i]=intervals[i][0];`
	`12`	`+end[i]=intervals[i][1];`
	`13`	`+}`
	`14`	`+`
	`15`	`+Array.Sort(start);`
	`16`	`+Array.Sort(end);`
	`17`	`+`
	`18`	`+for(ints=0,e=0;s<start.Length;s++)`
	`19`	`+if(start[s]<end[e])`
	`20`	`+result++;`
	`21`	`+else`
	`22`	`+e++;`
	`23`	`+`
	`24`	`+returnresult;`
	`25`	`+}`
	`26`	`+}`

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