foo.cc: In function 'void rd(T&)':
foo.cc:16:3: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   16 |   for(x=numb;isdigit(ch=getchar());x=x*10+numb);(fl==true)&&(x=-x);}
      |   ^~~
foo.cc:16:49: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   16 |   for(x=numb;isdigit(ch=getchar());x=x*10+numb);(fl==true)&&(x=-x);}
      |                                                 ^
foo.cc: In function 'void Miracle::dfs(int, int)':
foo.cc:44:13: warning: unused variable 'up' [-Wunused-variable]
   44 |         int up=a[has]*n;
      |             ^~

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