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1_736_3859_12535.cpp:7:10: error: 'll pow [70]' redeclared as different kind of symbol
 ll pow[70];
          ^
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 1_736_3859_12535.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);
                  ^
1_736_3859_12535.cpp: In function 'void init()':
1_736_3859_12535.cpp:10:7: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
  pow[0] = 1;
       ^
1_736_3859_12535.cpp:12:8: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
   pow[i] = pow[i-1]*2;
        ^
1_736_3859_12535.cpp:12:19: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
   pow[i] = pow[i-1]*2;
                   ^
1_736_3859_12535.cpp: In function 'll get(int)':
1_736_3859_12535.cpp:26:21: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
    ret = ret + pow[i] - 1;
                     ^
1_736_3859_12535.cpp:28:27: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
      ret = ret + pow[i-j-1] * (pow[j]-1);
                           ^
1_736_3859_12535.cpp:28:37: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
      ret = ret + pow[i-j-1] * (pow[j]-1);
                                     ^


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