foo.cc: In function 'int main()':
foo.cc:8:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    8 |  scanf("%d\n",&n);
      |  ~~~~~^~~~~~~~~~~
foo.cc:9:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    9 |  for(int i=1;i<=n;i++)scanf("%c",&s),a[i]=s=='L'?-1:1;
      |                       ~~~~~^~~~~~~~~

Found 10 testcases.
[Hydro](https://hydro.ac)提供评测服务