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View Compilation Error

0_0_32866732_23164.cpp:25:28: error: 'int pow [30]' redeclared as different kind of symbol
 int mul[MAXN << 2] , pow[30] ;
                            ^
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_32866732_23164.cpp:3:
GCC4.9.2/x86_64-w64-mingw32/include/math.h:151:18: note: previous declaration 'double pow(double, double)'
   double __cdecl pow(double _X,double _Y);
                  ^
0_0_32866732_23164.cpp: In function 'void pushdown(int)':
0_0_32866732_23164.cpp:34:24: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
   sum[ls] *= pow[mul[o]] ;
                        ^
0_0_32866732_23164.cpp:35:24: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
   sum[rs] *= pow[mul[o]] ;
                        ^
0_0_32866732_23164.cpp:36:24: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
   cnt[ls] *= pow[mul[o]] ;
                        ^
0_0_32866732_23164.cpp:37:24: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
   cnt[rs] *= pow[mul[o]] ;
                        ^
0_0_32866732_23164.cpp: In function 'int main()':
0_0_32866732_23164.cpp:109:7: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
  pow[0] = 1 ;
       ^
0_0_32866732_23164.cpp:110:26: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
  REP ( i , 1 , 30 ) pow[i] = pow[i - 1] << 1 ;
                          ^
0_0_32866732_23164.cpp:110:39: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
  REP ( i , 1 , 30 ) pow[i] = pow[i - 1] << 1 ;
                                       ^


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