View Compilation Error

0_0_38138112_13168.cpp: In function 'int dfs(int, int)':
0_0_38138112_13168.cpp:11:9: error: return-statement with no value, in function returning 'int' [-fpermissive]
         return;
         ^
0_0_38138112_13168.cpp:18:3: error: return-statement with no value, in function returning 'int' [-fpermissive]
   return;
   ^