View Compilation Error

0_0_22719787_17609.cpp: In function 'int Find(int)':
0_0_22719787_17609.cpp:19:8: error: 'ufs' was not declared in this scope
     if(ufs[x]==0)  
        ^
0_0_22719787_17609.cpp:21:12: error: 'ufs' was not declared in this scope
     return ufs[x] = Find(ufs[x]);  
            ^
0_0_22719787_17609.cpp: In function 'int main()':
0_0_22719787_17609.cpp:30:16: error: 'ufs' was not declared in this scope
         memset(ufs, 0, sizeof(ufs));  
                ^
0_0_22719787_17609.cpp:31:16: error: 'sum' was not declared in this scope
         memset(sum, 0, sizeof(sum));  
                ^