#include <stdio.h>
int run(int year) //判断是否为闰年
{
if(year%400==0||(year%4==0&&year%100!=0))
return 1;
return 0;
}
int main()
{
int i,j;
int ans=0,week=6;
int m[13]={0,31,28,31,30,31,30,31,31,30,31,30,31};
int year,month,day;
for(year=2000;year<=2020;year++) //枚举年份
{
if(run(year)==1) m[2]=29;
else m[2]=28;
for(i=1;i<=12;i++) //枚举月份
{
for(j=1;j<=m[i];j++) //枚举日期
{
if(week==1||j==1)
ans+=2;
else
ans+=1;
week=(week+1)%7; //周期维护
if(year==2020&&i==10&&j==1)
{
printf("%d",ans);
return 0;
}
}
}
}
return 0;
}//8879