View Compilation Error

0_0_34695830_5532.cpp: In function 'void rmq(int)':
0_0_34695830_5532.cpp:12:32: error: 'b' was not declared in this scope
  for(int i=1;i<=n;++i)dp[i][0]=b[i];
                                ^
0_0_34695830_5532.cpp: In function 'int main()':
0_0_34695830_5532.cpp:45:8: error: 'RMQ' was not declared in this scope
   RMQ(n);
        ^