foo.cc: In function 'int main()':
foo.cc:7:52: warning: variable 'cmaxs' set but not used [-Wunused-but-set-variable]
    7 |  int min=100000,mins,max=-100000,maxs,cmax=-100000,cmaxs;
      |                                                    ^~~~~
foo.cc:18:9: warning: 'maxs' may be used uninitialized in this function [-Wmaybe-uninitialized]
   18 |  a[maxs]=-100000;
      |  ~~~~~~~^~~~~~~~
foo.cc:25:3: warning: 'mins' may be used uninitialized in this function [-Wmaybe-uninitialized]
   25 |   if(mins<maxs) cout<<max-min<<endl;
      |   ^~

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