View Compilation Error

0_0_20917027_30205.cpp: In function 'int main()':
0_0_20917027_30205.cpp:54:36: error: 'qsort' was not declared in this scope
         qsort(mmm,w,sizeof(mmm),cmp);
                                    ^
0_0_20917027_30205.cpp:65:27: error: too many arguments to function 'int dfs(int, int, int)'
             if(dfs(1,0,n,0))
                           ^
0_0_20917027_30205.cpp:20:5: note: declared here
 int dfs(int deep, int sn,int an)  
     ^