View Compilation Error

0_0_29918918_27728.cpp:20:14: error: stray '#' in program
   return ans;#include <cstdio>
              ^
0_0_29918918_27728.cpp: In function 'int dfs(int, int, int, int)':
0_0_29918918_27728.cpp:20:15: error: 'include' was not declared in this scope
   return ans;#include <cstdio>
               ^
0_0_29918918_27728.cpp:20:24: error: 'cstdio' was not declared in this scope
   return ans;#include <cstdio>
                        ^
0_0_29918918_27728.cpp:24:1: error: expected primary-expression before 'using'
 using namespace std;
 ^
0_0_29918918_27728.cpp:28:1: error: a function-definition is not allowed here before '{' token
 {
 ^
0_0_29918918_27728.cpp:72:1: error: expected '}' at end of input
 }
 ^