foo.cpp:1:1: error: 'include' does not name a type
 include<iostream> 
 ^
foo.cpp: In function 'int main()':
foo.cpp:6:2: error: 'cin' was not declared in this scope
  cin>>V; 
  ^
foo.cpp:14:4: error: 'cout' was not declared in this scope
    cout<<V-dp[maxnum][V]; }
    ^