/in/foo.cc: In function 'int main()':
/in/foo.cc:11:20: warning: variable 'indexmax' set but not used [-Wunused-but-set-variable]
   11 |    int max=a[i][1],indexmax=1;
      |                    ^~~~~~~~
/in/foo.cc:23:20: warning: variable 'indexmin' set but not used [-Wunused-but-set-variable]
   23 |    int min=a[1][j],indexmin=1;
      |                    ^~~~~~~~