foo.cc:5:9: error: 'N' was not declared in this scope
    5 | bool st[N];
      |         ^
foo.cc: In function 'int main()':
foo.cc:38:16: error: 'h' was not declared in this scope
   38 |         memset(h,-1,sizeof(h));
      |                ^

Found 6 testcases.
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