/in/foo.cc: In function 'long long int search(long long int, long long int)':
/in/foo.cc:45:3: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   if (k==0) break;father=k;
   ^~
/in/foo.cc:45:19: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
   if (k==0) break;father=k;
                   ^~~~~~
/in/foo.cc: At global scope:
/in/foo.cc:54:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main(){
      ^
/in/foo.cc: In function 'long long int search(long long int, long long int)':
/in/foo.cc:43:16: warning: 'father' may be used uninitialized in this function [-Wmaybe-uninitialized]
  int mini=1e17,father;
                ^~~~~~