View Compilation Error

0_0_13323794_32219.cpp: In function 'int dfs(int, int, int)':
0_0_13323794_32219.cpp:5:19: error: too few arguments to function 'int dfs(int, int, int)'
 return dfs(depth-1);
                   ^
0_0_13323794_32219.cpp:3:5: note: declared here
 int dfs(int depth,int a,int b) {
     ^