foo.cc: In function 'int tianshu(int, int, int, int, int, int)':
foo.cc:36:26: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
        if(m==2 && (y%4==0&&y%100!=0||y%400==0)&&d==30)
                    ~~~~~~^~~~~~~~~~
foo.cc:42:27: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
        if(m== 2&& !(y%4==0&&y%100!=0||y%400==0)&&d==29)
                     ~~~~~~^~~~~~~~~~

自豪的采用HydroJudge(https://github.com/hydro-dev/Hydro)进行评测。