Travel by Bike

Travel by Bike

这是长沙网络赛水题了，上完课回来做的，思路是把日期移动到以星期1开始，然后以七天路程为一个周期长度，进行计算，开始想得太过简单直接超时了，按这样改了之后就A了。

#include<cstdio>
#include<cstring>
const double eps=1e-8; 
int dlcmp (double x) {return x<-eps?-1:x>eps;}int main(){char ch[20];double s,L;int start;while(scanf("%s",ch)!=EOF){if(strcmp(ch,"Sunday")==0)start=0;if(strcmp(ch,"Monday")==0)start=1;if(strcmp(ch,"Tuesday")==0)start=2;if(strcmp(ch,"Wednesday")==0)start=3;if(strcmp(ch,"Thursday")==0)start=4;if(strcmp(ch,"Friday")==0)start=5;if(strcmp(ch,"Saturday")==0)start=6;scanf("%lf %lf",&L,&s);if(start==0||start==6)L-=s*4;else if(start!=1)L-=s*8;while(dlcmp(L)>0&&start!=1){start=(start+1)%7;if(start==0||start==6)L-=s*4;else if(start!=1)L-=s*8;         }if(dlcmp(L)<0){if(start==0)printf("Sundayn");if(start==1)printf("Mondayn");if(start==2)printf("Tuesdayn");if(start==3)printf("Wednesdayn");if(start==4)printf("Thursdayn");if(start==5)printf("Fridayn");if(start==6)printf("Saturdayn");}else{double len=48*s;double temp=L/len;int tem=(int)temp;L = L-tem*len; if(start==0||start==6)L-=s*4;else L-=s*8;while(dlcmp(L)>0){start=(start+1)%7;if(start==0||start==6)L-=s*4;else L-=s*8;         }if(start==0)printf("Sundayn");if(start==1)printf("Mondayn");if(start==2)printf("Tuesdayn");if(start==3)printf("Wednesdayn");if(start==4)printf("Thursdayn");if(start==5)printf("Fridayn");if(start==6)printf("Saturdayn");}}return 0;
}