/in/foo.cc: In function 'long long int size(long long int)':
/in/foo.cc:21:1: error: expected 'while' before '}' token
 }
 ^
/in/foo.cc:21:1: error: expected '(' before '}' token
/in/foo.cc:21:1: error: expected primary-expression before '}' token
/in/foo.cc:21:1: error: expected ')' before '}' token
/in/foo.cc:21:1: error: expected ';' before '}' token
/in/foo.cc:21:1: warning: no return statement in function returning non-void [-Wreturn-type]
/in/foo.cc: In function 'int main()':
/in/foo.cc:26:22: error: expected primary-expression before ')' token
  for(long long i=0;i<)
                      ^
/in/foo.cc:26:22: error: expected ';' before ')' token
/in/foo.cc:28:1: error: expected primary-expression before '}' token
 }
 ^
/in/foo.cc:25:12: warning: unused variable 'y' [-Wunused-variable]
  long long y=tento(x);
            ^