#include <bits/stdc++.h> using namespace std; int main(){ int y,m; int r[13]={0,31,29,31,30,31,30,31,31,30,31,30,31}; cin>>y>>m; if((y%4==0&&y%100!=0)||(y%100==0&&y%400==0)) r[2]=28; cout<<r[m]<<endl; return 0; }```cpp #include <bits/stdc++.h> using namespace std; int main(){ int y,m; int r[13]={0,31,29,31,30,31,30,31,31,30,31,30,31}; cin>>y>>m; if((y%4==0&&y%100!=0)||(y%100==0&&y%400==0)) r[2]=28; cout<<r[m]<<endl; return 0; }