10281 - Average Speed

All about problems in Volume 102. If there is a thread about your problem, please use it. If not, create one with its number in the subject.

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htl
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Location: Taipei, Taiwan

10281 - Average Speed

Post by htl » Wed Jul 10, 2002 12:22 pm

Why does this code get WA?
[c]
#include<stdio.h>
#include<string.h>
void main(void)
{
int count,x;
long y,nowh,nowm,nows,h,m,s;
double dis,speed,t;
char time[10],buffer[10];
for(count=1,dis=0,speed=0;scanf("%s",time)!=EOF;count++)
{
gets(buffer);
if(!strlen(buffer) && count==1)
{
printf("%s 00.00km\n",time);
break;
}
nowh=(time[0]-'0')*10+time[1]-'0';
nowm=(time[3]-'0')*10+time[4]-'0';
nows=(time[6]-'0')*10+time[7]-'0';
if(count!=1)
{
y=(nowh-h)*3600+(nowm-m)*60+(nows-s);
dis+=(speed*((double)y/3600));
}
if(!strlen(buffer))
printf("%s %.2lfkm\n",time,dis);
else
{
for(x=0,t=0;buffer[x]!='\0';x++)
if(buffer[x]>='0' && buffer[x]<='9')
t=t*10+buffer[x]-'0';
speed=t;
}
h=nowh,m=nowm,s=nows;
}
}
[/c]

Picard
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Post by Picard » Wed Jul 10, 2002 1:15 pm

why do you 'break' when (!strlen(buffer) && count==1) ?
i think 00.00km should be 0.00km

htl
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Location: Taipei, Taiwan

Post by htl » Thu Jul 11, 2002 4:48 am

I've fix it and got accepted, thanks.

Sederik
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Post by Sederik » Sat Dec 10, 2005 1:59 pm

Hi. Please, help me find a reason for getting constant Wrong Answer!

Code: Select all

#include <string.h>
#include <stdio.h>
#include <stdlib.h>

int main ()
{
	char line[6], tmp[2];
	int ho, mo, sec, speed = 0, i;
	float distance = 0, time = 0;
	while (scanf("%d:%d:%[0-9 ]", &ho, &mo, line)!=EOF)
	{
		strncpy(tmp, line, 2);
		sec = atoi(tmp);
		distance+=(ho + mo/60.0 + sec/3600.0 - time)*speed;
		time = ho + mo/60.0 + sec/3600.0;

		if (strlen(line)>2)
		{
			for (i = 0; i<4; i++)
				line[i] = line[i+3];
			speed = atoi(line);
		}
		else
			printf("%02d:%02d:%02d %.02f km\n", ho, mo, sec, distance);
	}
return 0;
}

Sederik
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Post by Sederik » Sat Dec 10, 2005 5:18 pm

Sorry, already fixed it.

deena sultana
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10281 wa, plz help!

Post by deena sultana » Thu Jun 22, 2006 7:23 pm

Hi, friends.
i got wa for 10281.

is anyone there 2 help me? plzzzzzzzzz. :cry:

Code: Select all


Last edited by deena sultana on Thu Jun 22, 2006 8:01 pm, edited 1 time in total.

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emotional blind
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Post by emotional blind » Thu Jun 22, 2006 7:40 pm

Use

Code: Select all

%lf
instead of

Code: Select all

%f
as specifier incase of double

deena sultana
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Post by deena sultana » Thu Jun 22, 2006 8:03 pm

dear emotional_blind
THANK U SO MUCH. Its ac now!

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emotional blind
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Post by emotional blind » Thu Jun 22, 2006 9:57 pm

another mistake (Judge will give you WA in this case)

You wrote:

Code: Select all

emotional_blind
Correction:

Code: Select all

emotional blind
keep posting

deena sultana
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Post by deena sultana » Thu Jun 22, 2006 10:21 pm

Ohhho , that's why i get so much wa.right?

emotional blind, i m sorry.
u r great! thnx.

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Zaspire
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Location: Russia

10281 -WA HELP PLEASE

Post by Zaspire » Thu Jul 13, 2006 2:07 pm

Hi, friends.
i got wa for 10281.

Code: Select all

#include <stdio.h>

#ifndef ONLINE_JUDGE
#include <io.h>
#include <fcntl.h>
#endif

int main()
{
#ifndef ONLINE_JUDGE
	close(0);
	open("in.txt",O_RDONLY);
#endif
	int h,m,s,col=0;
	char str[80],time[10];
	long long time1,time2;
	double speed,dist=0,t;
	while (scanf("%s",time)!=EOF)
	{
		sscanf(time,"%i%*c%i%*c%i",&h,&m,&s);
		str[0]='\0';
		gets(str);
		time2=(s+60*(((long long)h)*60+m));
		if (sscanf(str,"%lf",&t)!=EOF)
		{
			if (col) dist+=(time2-time1)*speed/3600.0;
			col++;
			time1=time2;
			speed=t;
		}
		else
		{
			if (col) printf("%s %.2lf km\n",time,(double)(dist+(time2-time1)*speed/3600.0));
			else printf("%s 0.00 km\n",time);
		}
	}
	return 0;
}
[/quote]

mf
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Post by mf » Thu Jul 13, 2006 2:45 pm

%i treats numbers with leading zeroes as octal numbers, I think. Use %d instead.

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Zaspire
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Post by Zaspire » Thu Jul 13, 2006 3:39 pm

Thanks you.
I got AC now :D

Mushfiqur Rahman
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Post by Mushfiqur Rahman » Wed May 02, 2007 4:38 am

Sederik wrote
Sorry, already fixed it.
Then u should remove your code from the thread. Please do it.

Mushfiqur Rahman
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Post by Mushfiqur Rahman » Wed May 02, 2007 5:24 am

Code: Select all

Now I got Accepted. The only special case of this problem is that there may trailling spaces and speed can be 0 km/hour .

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