foo.cc:85:5: error: conflicting declaration 'int s [100001]'
   85 | int s[N],tag[N];
      |     ^
foo.cc:5:13: note: previous declaration as 'int s [100010]'
    5 | int a[maxn],s[maxn],t[maxn];
      |             ^
foo.cc:85:10: error: conflicting declaration 'int tag [100001]'
   85 | int s[N],tag[N];
      |          ^~~
foo.cc:6:5: note: previous declaration as 'int tag [400]'
    6 | int tag[400];
      |     ^~~
foo.cc: In function 'void read(int&)':
foo.cc:90:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   90 |     for(x=0; isdigit(ch); x=x*10+ch-'0',ch=getchar()); if(ok) x=-x;
      |     ^~~
foo.cc:90:56: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   90 |     for(x=0; isdigit(ch); x=x*10+ch-'0',ch=getchar()); if(ok) x=-x;
      |                                                        ^~
foo.cc: At global scope:
foo.cc:138:5: error: redefinition of 'int main()'
  138 | int main()
      |     ^~~~
foo.cc:16:5: note: 'int main()' previously defined here
   16 | int main()
      |     ^~~~
foo.cc: In function 'int main()':
foo.cc:19:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   19 |  scanf("%d",&n);
      |  ~~~~~^~~~~~~~~
foo.cc:23:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   23 |   scanf("%d",a+i);
      |   ~~~~~^~~~~~~~~~
foo.cc:32:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   32 |   scanf("%d%d%d%d",&opt,&l,&r,&c);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

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Found 10 testcases.
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