题解

#include<bits/stdc++.h>
using namespace std;
int main()
{
int n;
cin>>n;
int a[13]={0,31,28,31,30,31,30,31,31,30,31,30,31};
int c=0;
for(int i=1;i<=12;i++)
{
if((12+c+n)%7 == 5) cout<<i<<endl;
c+=a[i];
}
return 0;
}