/in/foo.cc: In function 'int main()':
/in/foo.cc:16:12: warning: iteration 1000 invokes undefined behavior [-Waggressive-loop-optimizations]
   16 |    a[i][j] = '\0';
      |    ~~~~~~~~^~~~~~
/in/foo.cc:15:21: note: within this loop
   15 |   for (int j = 0; j < 10000; j++) {
      |                   ~~^~~~~~~