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View Compilation Error

0_0_18686789_20057.cpp:19:10: error: 'int pow [15]' redeclared as different kind of symbol
 int pow[M];
          ^
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_18686789_20057.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_18686789_20057.cpp: In function 'int Trans(int*)':
0_0_18686789_20057.cpp:24:34: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
   ret += a[m - i + 1] * pow[i - 1];
                                  ^
0_0_18686789_20057.cpp: In function 'int main()':
0_0_18686789_20057.cpp:29:7: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
  pow[0] = 1;
       ^
0_0_18686789_20057.cpp:31:8: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
   pow[i] = pow[i - 1] + pow[i - 1];
        ^
0_0_18686789_20057.cpp:31:21: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
   pow[i] = pow[i - 1] + pow[i - 1];
                     ^
0_0_18686789_20057.cpp:31:34: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
   pow[i] = pow[i - 1] + pow[i - 1];
                                  ^
0_0_18686789_20057.cpp:71:40: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
         lst[m - k + 1] = (s / pow[k - 1]) % 2;
                                        ^
0_0_18686789_20057.cpp:159:38: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
       now[m - k + 1] = (s / pow[k - 1]) % 2;
                                      ^


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