foo.cc: In function 'int main()':
foo.cc:29:27: warning: statement has no effect [-Wunused-value]
   29 |                         ok==0;
      |                         ~~^~~
foo.cc:8:32: warning: unused variable 's' [-Wunused-variable]
    8 |         int xmin,xmax,a[10000],s,s1;
      |                                ^
foo.cc:8:34: warning: unused variable 's1' [-Wunused-variable]
    8 |         int xmin,xmax,a[10000],s,s1;
      |                                  ^~
foo.cc:37:15: warning: 'n' may be used uninitialized [-Wmaybe-uninitialized]
   37 |         cout<<n;
      |               ^
foo.cc:33:18: note: 'n' was declared here
   33 |          int m=0,n;
      |                  ^

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