/in/foo.cc: In function 'int main()':
/in/foo.cc:8:11: warning: array subscript is above array bounds [-Warray-bounds]
  f[1][1000]=1;
  ~~~~~~~~~^
/in/foo.cc:9:11: warning: array subscript is above array bounds [-Warray-bounds]
  f[2][1000]=2;
  ~~~~~~~~~^
/in/foo.cc:13:12: warning: array subscript is above array bounds [-Warray-bounds]
   f[i][1000]=1;
   ~~~~~~~~~^