View Compilation Error

0_0_36330946_27782.cpp: In function 'int main()':
0_0_36330946_27782.cpp:60:3: error: expected initializer before 'for'
   for(int i=0;i<n;i++)
   ^
0_0_36330946_27782.cpp:60:15: error: 'i' was not declared in this scope
   for(int i=0;i<n;i++)
               ^
0_0_36330946_27782.cpp:73:7: error: 'b' was not declared in this scope
   dfs(b);
       ^