#include <stdio.h> int main() { int Pmonth[13]={0,31,28,31,30,31,30,31,31,30,31,30,31}; int Rmonth[13]={0,31,29,31,30,31,30,31,31,30,31,30,31}; int month,year; int n; while( (n=scanf("%d%d",&year,&month))==2 ) { if (year%4==0&&year%100!=0||year%400==0) { printf(&...