View Compilation Error

0_0_25647552_19757.cpp: In function 'void init()':
0_0_25647552_19757.cpp:12:9: error: 'father' was not declared in this scope
         father[i]=i;
         ^
0_0_25647552_19757.cpp: In function 'int find(int)':
0_0_25647552_19757.cpp:19:8: error: 'father' was not declared in this scope
     if(father[x]!=x)
        ^
0_0_25647552_19757.cpp:21:12: error: 'father' was not declared in this scope
     return father[x];
            ^
0_0_25647552_19757.cpp: In function 'void merge(int, int)':
0_0_25647552_19757.cpp:30:5: error: 'father' was not declared in this scope
     father[y]=x;
     ^