/in/foo.cc: In function 'int isLeap(int)':
/in/foo.cc:7:25: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
  if (y%400==0 || y%4==0 && y%100!=0)
                  ~~~~~~~^~~~~~~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:27:36: warning: unused variable 'LastMonthDay' [-Wunused-variable]
  int y1, m1, d1, y2, m2, d2, days, LastMonthDay;
                                    ^~~~~~~~~~~~

VJ4Error('ProblemDataNotFoundError', '题目 1004 的数据未找到。', 'nnu_contest', 1004)