foo.cc: In function 'int main()':
foo.cc:15:23: error: expected ';' before 't'
   15 |              w[i]=w[t]
      |                       ^
      |                       ;
   16 |             t++;
      |             ~          
foo.cc:9:12: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    9 |       scanf("%d",&w[i]);
      |       ~~~~~^~~~~~~~~~~~

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