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0_0_20964179_17626.cpp:1:59: error: stray '#' in program
 <pre name="code" class="cpp"><pre name="code" class="cpp">#include <iostream>
                                                           ^
0_0_20964179_17626.cpp:1:1: error: expected unqualified-id before '<' token
 <pre name="code" class="cpp"><pre name="code" class="cpp">#include <iostream>
 ^
0_0_20964179_17626.cpp: In function 'int main()':
0_0_20964179_17626.cpp:14:8: error: 'cin' was not declared in this scope
  while(cin>>n>>m)
        ^
0_0_20964179_17626.cpp:23:3: error: 'cout' was not declared in this scope
   cout<<a<<" "<<b<<endl;
   ^
0_0_20964179_17626.cpp:23:20: error: 'endl' was not declared in this scope
   cout<<a<<" "<<b<<endl;
                    ^