#include<iostream> int main (){ int a, b, c; scanf("%d %d", &a, &b); switch(b){ case 4: case 6: case 9: case 11: c=30; break; case 2: if((a%400==0)||(a%4==0&&a%100!=0)) c=29; else c=28; break; default: c=31; } printf("%d\n",c); return 0; }