#include<stdio.h>int main(){ int y = 0; int m = 0; int days[12] = { 31,28,31,30,31,30,31,31,30,31,30,31}; while(scanf("%d %d", &y, &m) != EOF) { int day = days[m-1]; if((y%4==0) && (y%100!=0) || (y%400==0)) { if(m == 2) day++; } printf("%d\n", day); } return...