/in/foo.cc: In function 'int main()':
/in/foo.cc:5:3: warning: statement has no effect [-Wunused-value]
  n<100000;
  ~^~~~~~~
/in/foo.cc:9:14: warning: comparison of constant '1000' with boolean expression is always true [-Wbool-compare]
  0<numbers[n]<=1000;
  ~~~~~~~~~~~~^~~~~~
/in/foo.cc:9:3: warning: comparisons like 'X<=Y<=Z' do not have their mathematical meaning [-Wparentheses]
  0<numbers[n]<=1000;
  ~^~~~~~~~~~~
/in/foo.cc:9:14: warning: statement has no effect [-Wunused-value]
  0<numbers[n]<=1000;
  ~~~~~~~~~~~~^~~~~~