View Compilation Error

0_0_13104201_32678.cpp: In function 'void dfs(int)':
0_0_13104201_32678.cpp:15:27: error: return-statement with a value, in function returning 'void' [-fpermissive]
     if(max_cnt>=k) return 0;
                           ^
0_0_13104201_32678.cpp:19:16: error: return-statement with a value, in function returning 'void' [-fpermissive]
         return 0;
                ^