View Compilation Error

0_0_17566552_10932.cpp: In function 'void dfs(int, int, int)':
0_0_17566552_10932.cpp:17:32: error: 's3' was not declared in this scope
      if (a1==sum && a2==sum && s3==sum) (flag=1;return;}
                                ^
0_0_17566552_10932.cpp:17:48: error: expected ')' before ';' token
      if (a1==sum && a2==sum && s3==sum) (flag=1;return;}
                                                ^
0_0_17566552_10932.cpp: At global scope:
0_0_17566552_10932.cpp:19:6: error: expected unqualified-id before 'for'
      for (i=1;i<=n;i++)
      ^
0_0_17566552_10932.cpp:19:15: error: 'i' does not name a type
      for (i=1;i<=n;i++)
               ^
0_0_17566552_10932.cpp:19:20: error: 'i' does not name a type
      for (i=1;i<=n;i++)
                    ^
0_0_17566552_10932.cpp:30:6: error: expected unqualified-id before 'return'
      return ;
      ^
0_0_17566552_10932.cpp:31:1: error: expected declaration before '}' token
 }
 ^