foo.cc: In function 'int main()':
foo.cc:24:1: error: a function-definition is not allowed here before '{' token
   24 | {
      | ^
foo.cc:10:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   10 |     scanf("%lf%lf%lf%lf%lf",&k,&x1,&x2,&x3,&x4);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

正在同步测试数据，请稍后
[Hydro](https://hydro.ac)提供评测服务