View Compilation Error

0_0_36179930_20068.cpp: In function 'void kurskal()':
0_0_36179930_20068.cpp:61:16: error: return-statement with a value, in function returning 'void' [-fpermissive]
        return -1;
                ^
0_0_36179930_20068.cpp: In function 'int main()':
0_0_36179930_20068.cpp:77:9: error: expected identifier before '!=' token
   if(and!=-1)printf("%d\n", ans);
         ^