#include<iostream> int main(){ int y,m,d; scanf("%d %d %d",&y,&m,&d); switch(m){ case 1:printf("%d",31);break; case 3:printf("%d",31);break; case 5:printf("%d",31);break; case 7:printf("%d",31);break; case 8:printf("%d",31);break; case 10:printf("%d",31);break; case 12:printf("%d",31);break; case 4:printf("%d",30);break; case 6:printf("%d",30);break; case 9:printf("%d",30);break; case 11:printf("%d",30);break; case 2: if((y%4==0&&y%100!=0)||(y%400==0)) printf("%d",29); else printf("%d",28);break; } return 0; }