foo.cc: In function 'int main()':
foo.cc:81:25: warning: unused variable 'cnt' [-Wunused-variable]
   81 |         int sum[N]; int cnt = 1;
      |                         ^~~
foo.cc:90:27: warning: iteration 10001 invokes undefined behavior [-Waggressive-loop-optimizations]
   90 |                 he[i - 1] = h + i * k;
      |                 ~~~~~~~~~~^~~~~~~~~~~
foo.cc:88:27: note: within this loop
   88 |         for (int i = 1; i <= 100000; i++)
      |                         ~~^~~~~~~~~

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