foo.cc: In function 'int main()':
foo.cc:155:16: warning: unused variable 'num2' [-Wunused-variable]
  155 |     int t = 0, num2 = 0;
      |                ^~~~
foo.cc:166:6: warning: unused variable 'num1' [-Wunused-variable]
  166 |  int num1 = 0;
      |      ^~~~

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