View Compilation Error

0_0_33112978_13445.cpp: In function 'int main()':
0_0_33112978_13445.cpp:61:14: error: 'add' was not declared in this scope
     add(x,y,1);
              ^
0_0_33112978_13445.cpp:62:5: error: 'vis' was not declared in this scope
     vis[x]=1;
     ^
0_0_33112978_13445.cpp:71:4: error: expected unqualified-id before '}' token
    }
    ^