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  1. #include <stdio.h>
  2.  
  3. long int n=0,temp,number_of_coins,number_of_inputs,bit_mask;
  4. long int number_of_ones(long int i) //Return the number of bits set
  5. {
  6.    return __builtin_popcountl(i);
  7. }
  8. int main(void)
  9. {
  10.     long int ctr,lower,upper,length;
  11.     int op;
  12.  
  13.     scanf("%ld %ld",&number_of_coins,&number_of_inputs);
  14.     length = number_of_coins-1;
  15.     for(ctr = 0 ; ctr < number_of_inputs;ctr++) //Main loop
  16.     {
  17.         scanf("%d %ld %ld",&op,&lower,&upper);
  18.         bit_mask = ((1 << length-lower+1)-1) & ~((1 << length-upper)-1);
  19.  
  20.         if(op == 0)
  21.         {
  22.  
  23.             n ^= bit_mask ; //Toggle the bits in the range lower to upper
  24.  
  25.         }
  26.         else
  27.         {
  28.             temp = n;
  29.             temp &= bit_mask;
  30.             printf("%ld\n",number_of_ones(temp)); //Print number of bits set
  31.         }
  32.  
  33.     }
  34.     return 0;
  35. }
Success #stdin #stdout 0.01s 2728KB
comments (?)
stdin 
1000 5
1 0 999
0 999 999
1 0 999
0 0 999
1 0 999
stdout 
0
1
7
https://ideone.com/X5Jdb
language:
C++ (gcc 8.3)
created:
12 years ago
visibility:
secret

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