View Compilation Error

0_0_17183750_29772.cpp:9:17: error: 'v' has not been declared
 int merge(int u,v)
                 ^
0_0_17183750_29772.cpp: In function 'int merge(int, int)':
0_0_17183750_29772.cpp:11:5: error: 'p' was not declared in this scope
     p[u]=v;
     ^
0_0_17183750_29772.cpp:11:10: error: 'v' was not declared in this scope
     p[u]=v;
          ^
0_0_17183750_29772.cpp: In function 'int main()':
0_0_17183750_29772.cpp:28:13: error: 'x' was not declared in this scope
             x=find(a);
             ^
0_0_17183750_29772.cpp:29:13: error: 'y' was not declared in this scope
             y=find(b);
             ^
0_0_17183750_29772.cpp:38:35: error: expected ';' before ':' token
             if(parent[i]==i) ans++:
                                   ^