#include #include using namespace std; int main() { int y,m; cin >>y>>m; if (m1||m3||m7||m8||m10||m12) cout <<"31"; else if(m4||m6||m9||m11) cout <<30; else{ if(y%4000||(y%40&&y%100!=0)) cout <<"29"; else cout <<"28"; } return 0; }