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Code Golf

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    \$\begingroup\$ Hi, welcome to CGCC. You can golf your answer by using for-loops instead of while-loops. Also, you currently have a hard-coded upper-bound of 2,000,000 (\$2\times1000^2\$), so you might want to mention that in your answer. Both shorter and more correct would be to use the input n instead of 1e3 though: 74 bytes \$\endgroup\$ Commented Feb 7, 2022 at 9:49
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    \$\begingroup\$ Also, if you haven't seen it yet, tips for golfing in C and tips for golfing in <all languages> might be interesting to read through. :) \$\endgroup\$ Commented Feb 7, 2022 at 9:50
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    \$\begingroup\$ Using a global variable as you did it's not allowed , you can pass a pointer. Here a small golf for you, and welcome to code golf \$\endgroup\$ Commented Feb 7, 2022 at 12:39
  • \$\begingroup\$ @AZTECCO What does g=g mean?:) \$\endgroup\$ Commented Feb 7, 2022 at 12:49
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    \$\begingroup\$ See this. Magic GCC stuff. But if you use this trick, the language you're competing in is C (GCC -O0) \$\endgroup\$ Commented Feb 7, 2022 at 13:12