View Compilation Error

0_0_30214294_21621.cpp:41:13: error: 'int log [60010]' redeclared as different kind of symbol
 int log[N<<1];
             ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/cmath:44:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/random:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:66,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/algorithm:62,
                 from 0_0_30214294_21621.cpp:4:
GCC4.9.2/x86_64-w64-mingw32/include/math.h:149:18: note: previous declaration 'double log(double)'
   double __cdecl log(double _X);
                  ^
0_0_30214294_21621.cpp: In function 'void ST()':
0_0_30214294_21621.cpp:55:8: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
   log[i]=pw;
        ^
0_0_30214294_21621.cpp: In function 'int LCA(int, int)':
0_0_30214294_21621.cpp:69:19: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
  int k=log[rb-lb+1];
                   ^