/in/foo.cc: In function 'int main()':
/in/foo.cc:31:9: warning: unused variable 'max1' [-Wunused-variable]
   31 |     int max1 = findmax(a, n1, index1);
      |         ^~~~
/in/foo.cc:34:9: warning: unused variable 'max2' [-Wunused-variable]
   34 |     int max2 = findmax(b, n2, index3);
      |         ^~~~