View Compilation Error

0_0_33739725_10866.cpp: In function 'int main()':
0_0_33739725_10866.cpp:41:3: error: expected ',' or ';' before 'int'
   int sum=n;
   ^
0_0_33739725_10866.cpp:63:25: error: 'sum' was not declared in this scope
             if(book[1]&&sum>1)
                         ^
0_0_33739725_10866.cpp:68:13: error: 'sum' was not declared in this scope
             sum-=Set.size();
             ^