/in/foo.cc: In function 'int main()':
/in/foo.cc:9:29: warning: iteration 98 invokes undefined behavior [-Waggressive-loop-optimizations]
   for(i=1;i<100;i++) {if(a[i]>a[i-1]) max=a[i];if(a[i]<a[i-1]) min=a[i];}
                          ~~~^
/in/foo.cc:9:12: note: within this loop
   for(i=1;i<100;i++) {if(a[i]>a[i-1]) max=a[i];if(a[i]<a[i-1]) min=a[i];}
           ~^~~~
/in/foo.cc:11:11: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized]
  cout<<ans;
           ^