Commit db5574a

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	`1`	`+#!/bin/python3`
	`2`	`+`
	`3`	`+import math`
	`4`	`+import os`
	`5`	`+import random`
	`6`	`+import re`
	`7`	`+import sys`
	`8`	`+`
	`9`	`+def sockMerchant(n, ar):`
	`10`	`+ count = 0`
	`11`	`+ ar.sort()`
	`12`	`+ ar.append('#')`
	`13`	`+ i = 0`
	`14`	`+ while i<n:`
	`15`	`+ if ar[i]==ar[i+1]:`
	`16`	`+ count = count+1`
	`17`	`+ i+=2`
	`18`	`+ else:`
	`19`	`+ i+=1`
	`20`	`+ return count`
	`21`	`+`
	`22`	`+if __name__ == '__main__':`
	`23`	`+ fptr = open(os.environ['OUTPUT_PATH'], 'w')`
	`24`	`+`
	`25`	`+ n = int(input())`
	`26`	`+`
	`27`	`+ ar = list(map(int, input().rstrip().split()))`
	`28`	`+`
	`29`	`+ result = sockMerchant(n, ar)`
	`30`	`+`
	`31`	`+ fptr.write(str(result) + '\n')`
	`32`	`+`
	`33`	`+ fptr.close()`

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