#include <stdio.h> int monthday[]={0, // (1) 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; int sumday[13]; char str[100]; int y,m,d; int main() { scanf("%4d %2d %2d",&y,&m,&d); if(y%4==0&&y%100||y%400==0) { monthday[2] = 29; } else{ monthday[2]=28; } int count = 0; for(int i = 0;i<m;++i...