foo.cc:15:1: error: '::main' must return 'int'
   15 | void main()
      | ^~~~
foo.cc: In function 'int main()':
foo.cc:17:46: error: 'INFINITY' was not declared in this scope
   17 |     int n,tmp,ans=0,all_xor=0,num_xor=0,minx=INFINITY;
      |                                              ^~~~~~~~
foo.cc:17:21: warning: unused variable 'all_xor' [-Wunused-variable]
   17 |     int n,tmp,ans=0,all_xor=0,num_xor=0,minx=INFINITY;
      |                     ^~~~~~~

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