foo.cc: In function 'int main()':
foo.cc:9:13: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    9 |        scanf("%d",&w[i]);
      |        ~~~~~^~~~~~~~~~~~
foo.cc:25:16: warning: 'maxx' may be used uninitialized in this function [-Wmaybe-uninitialized]
   25 |     cout<<maxx+ans<<endl;
      |                ^~~
foo.cc:25:16: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized]

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