/in/foo.cc: In function 'void dfs(int, int, int)':
/in/foo.cc:36:22: error: too few arguments to function 'void dfs(int, int, int)'
  if(x<k)dfs(x+1,dep+1);
                      ^
/in/foo.cc:12:6: note: declared here
 void dfs(int x,int dep,int less){
      ^~~
/in/foo.cc:37:22: error: too few arguments to function 'void dfs(int, int, int)'
  if(x>0)dfs(x-1,dep+1);
                      ^
/in/foo.cc:12:6: note: declared here
 void dfs(int x,int dep,int less){
      ^~~
/in/foo.cc:38:30: error: too few arguments to function 'void dfs(int, int, int)'
  if(x<k && v==0)dfs(x+x,dep+1);
                              ^
/in/foo.cc:12:6: note: declared here
 void dfs(int x,int dep,int less){
      ^~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:45:9: error: too few arguments to function 'void dfs(int, int, int)'
  dfs(n,0);
         ^
/in/foo.cc:12:6: note: declared here
 void dfs(int x,int dep,int less){
      ^~~