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  1. #include<stdio.h>
  2. int main()
  3. {
  4.     int test(int*, int);
  5.     int arr[] = {0, 1, 1, 1, 4, 4};
  6.     int length = sizeof(arr)/sizeof(int);
  7.     test(arr,length);
  8.     return 1;
  9. }
  10.  
  11. int test(int* arr,int N)
  12. {
  13.     int result1 = 0;   // store the xor of arr[arr[i]] 
  14.     int result2 = 0;   // store the xor of all numbers
  15.     int result3 = 0;   // store the xor of all indexes
  16.  
  17.     int countZeros = 0;
  18.     int countFirstValue = 0;
  19.     int init = arr[0];
  20.  
  21.     //if(init==0)
  22.     //count++;
  23.  
  24.     // checks for special case either 0 is repeated or the first value is repeated 
  25.     int i;
  26.     for(i=0;i<N;i++)
  27.     {
  28.         if(arr[i]==0)
  29.         countZeros++;
  30.         else if(arr[i]==init)
  31.         countFirstValue++;
  32.  
  33.         if(countZeros >1 || countFirstValue > 1)
  34.         {
  35.             printf("Repeated");
  36.             return -1;
  37.         }
  38.  
  39.     }
  40.  
  41.     for(i=0;i<N;i++)
  42.     {
  43.         result1 ^= arr[arr[i]];
  44.         result2 ^= arr[i];
  45.         result3 ^= i;
  46.     }
  47.     if((result1==result2) && (result1==result3))
  48.     printf("NOT REPEATED");
  49.     else
  50.     printf("REPEATED");
  51.     return 1;
  52. }
Runtime error #stdin #stdout 0.02s 2680KB
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stdin
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Standard input is empty
stdout
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NOT REPEATED
https://ideone.com/3sreLZ
language:
C++ (gcc 8.3)
created:
13 years ago
visibility:
public

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