foo.cc: In function 'int main()':
foo.cc:11:23: warning: 'd' may be used uninitialized [-Wmaybe-uninitialized]
   11 |         if(a<b && b>c && c>d)
      |            ~~~~~~~~~~~^~~~~~
foo.cc:6:21: note: 'd' was declared here
    6 |         int n,a,b,c,d;
      |                     ^

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