foo.cc: In function 'int main()':
foo.cc:9:13: warning: unused variable 's' [-Wunused-variable]
    9 |         int s=0,qmax=0,zmax=0;
      |             ^
foo.cc:9:17: warning: unused variable 'qmax' [-Wunused-variable]
    9 |         int s=0,qmax=0,zmax=0;
      |                 ^~~~
foo.cc:9:24: warning: unused variable 'zmax' [-Wunused-variable]
    9 |         int s=0,qmax=0,zmax=0;
      |                        ^~~~

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