View Compilation Error

0_0_36084574_28031.cpp: In function 'int main()':
0_0_36084574_28031.cpp:81:10: error: too few arguments to function 'bool dfs(int)'
   if(dfs() && spfa()) printf("winnable\n");
          ^
0_0_36084574_28031.cpp:17:6: note: declared here
 bool dfs(int k)
      ^