Problem 54

7 comments on “Problem 54”

• 
  

  pritiumbare2000

  #include
  #include
  #include
  int main()
  {

  int count=0,pair=0,i,j,n,len;
  int arr[]={1,2,1,3,1,2,3,3,3,1};
  len=sizeof(arr)/sizeof(int);
  for(i=0;i<n;i++)
  {
  scanf("%d",&arr[i]);
  }

  for(i=0;i<len;i++)
  {
  for(j=i;j<len;j++)
  {
  if(arr[i]==arr[j])
  count++;

  }
  if(count%2==0)
  pair++;
  count=0;
  }
  printf("%d",pair);
  }

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• 
  

  Kritika

  def find_pair(color):
  sock={}
  pair=0

  for a in color:
  if a in sock.keys():
  sock[a]+=1
  else:
  sock[a]=1

  for b in sock.keys():
  pair+=(sock[b])//2

  return pair

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• 
  

  shushank

  #Python

  n=int(input())
  l=list(map(int,input().split(” “)))
  s=list(set(l))
  c=0
  for i in range(len(s)):
  a1=s[i]
  d=l.count(a1)
  c=c+d//2
  print(c)

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• 
  

  Mihir

  #python code

  def sockmerchant(socks):
  paircnt = 0
  sockset = set(socks)
  for i in sockset :
  if socks.count(i) > 1 :
  paircnt += socks.count(i) // 2

  return paircnt

  a = input()
  socks = input()
  socks = socks.split(‘ ‘)
  socks = list(map(int,socks))

  print(sockmerchant(socks))

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• 
  

  goutham

  #include
  using namespace std;
  int main()
  {int i,j,x,n,count=0,pair=0;
  cin>>n;
  int a[n];
  for(i=0;i>a[i];}
  sort(a,a+n);x=a[0];
  for(i=0;i<n;i++)
  {if(a[i]==x)
  {count++;}
  if(a[i]!=x)
  {pair=pair+(count/2);
  x=a[i];count=1;}
  if(i==n-1)
  {pair=pair+(count/2);}
  }
  cout<<pair;
  return 0;
  }

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• 
  

  sneha

  #include

  int main()
  {
  int a[10]={10,20,20,10,10,30,50,10,20},c=0,p=0;
  for(int i=0;i<9;i++)
  {

  for(int j=i;j<9;j++)
  {

  if(a[i]==a[j])
  {
  c++;

  }

  }
  if(c%2==0)
  {
  p++;
  }
  c=0;

  }

  printf("%d",p);

  return 0;
  }

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• 
  

  rabi

  from collections import Counter
  list1=[]

  n=int(input())
  arr=list(map(int,input().split()))
  x=Counter(arr)
  for i in x.values():
  list1.append(i)
  sum1=0
  for i in list1:
  if i>1:
  sum1+=i
  print(sum1//2)

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