foo.cc: In function 'int main()':
foo.cc:5:22: error: expected ';' before '<' token
    5 |         for(int i=4,i<20190324,i++)
      |                      ^
      |                      ;
foo.cc:5:22: error: expected primary-expression before '<' token
foo.cc:5:35: error: expected ';' before ')' token
    5 |         for(int i=4,i<20190324,i++)
      |                                   ^
      |                                   ;

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