foo.cc: In function 'int main()':
foo.cc:17:2: error: expected ';' before 'for'
  for(i=1;i<=n;i++)
  ^~~
foo.cc:17:11: warning: statement has no effect [-Wunused-value]
  for(i=1;i<=n;i++)
          ~^~~
foo.cc:17:18: error: expected ';' before ')' token
  for(i=1;i<=n;i++)
                  ^

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