#include <stdio.h> int main() { int year = 0; int month = 0; while(scanf("%d %d", &year, &month)!=EOF) { switch (month) { case 1: case 3: case 5: case 7: case 8: case 10: case 12:printf("%d\n", 31); break; case 4: case 6: case 9: case 11:printf("%d\n", 30); break...