View Compilation Error

0_0_21474690_6030.cpp:1:2: error: invalid preprocessing directive #nclude
 #nclude<iostream>
  ^
0_0_21474690_6030.cpp: In function 'int main()':
0_0_21474690_6030.cpp:30:56: error: expected ']' before ')' token
                     dp[i][j]=(dp[i-1][j]+dp[i-1][j-a[i])*0.5;
                                                        ^