usaco1.1.3 Friday the Thirteenth黑色星期五

/*
ID: wsc5001
LANG: C
TASK: friday
*/
#include<stdio.h>
int runnian(int y)
{
if (y%100==0)
{
if (y%400==0)
return 1;
else
return 0;
}
if (y%4==0)
return 1;
}
int xingqi(int yu)
{
switch (yu)
{
case 0:return 6;
case 1:return 7;
default:return yu-1;
}
}
int main()
{
FILE *fin,*fout;
fin=fopen("friday.in","r");
fout=fopen("friday.out","w");
int i,j,n,runyear,tongji[8]={0},dayone=1,t;
fscanf(fin,"%d",&n);
for(i=0;i<n;i++)
{
runyear=runnian(1900+i);
for(j=1;j<=12;j++)
{
t=xingqi((dayone+13)%7);
tongji[t]+=1;
if(j==2)//二月
{
if (runyear==1)
dayone=xingqi(dayone+29+1); //闰年
else
dayone=xingqi(dayone+28+1);
}
else if(j==4||j==6||j==9||j==11)//小月
dayone=xingqi(dayone+30+1);
else//大月
dayone=xingqi(dayone+31+1);
}
}
fprintf(fout,"%d %d %d %d %d %d %d\n",tongji[6],tongji[7],tongji[1],tongji[2],tongji[3],tongji[4],tongji[5]);
//printf("%d %d %d %d %d %d %d\n",tongji[6],tongji[7],tongji[1],tongji[2],tongji[3],tongji[4],tongji[5]);
fclose(fin);
fclose(fout);
//getchar();
}