foo.cc: In function 'int main()':
foo.cc:26:9: warning: unused variable 'maxdep' [-Wunused-variable]
   26 |     int maxdep=1;
      |         ^~~~~~
foo.cc: In function 'long long int read()':
foo.cc:8:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    8 |     scanf("%lld",&x);
      |     ~~~~~^~~~~~~~~~~

正在同步测试数据，请稍后
Found 20 testcases.
[Hydro](https://hydro.ac)提供评测服务