10071 - Back to High School Physics

[keceman]

hm... actually i'm still don't understand what does
while (scanf... == 2 ) mean.. .hehehe

[keceman]

ops... i finally finished it, i've changed the code into

while ((cin >> v >> t) != 0)
{
blablabla
}

although i still dont get what does the while statement mean.. heuheuheuhue

[eg_frx]

ops... i finally finished it, i've changed the code into

while ((cin >> v >> t) != 0)
{
blablabla
}

although i still dont get what does the while statement mean.. heuheuheuhue

I would simply do

Code: Select all

while(cin >> v >> t){
...
}

Some explainations here:
When cin fails to send values to v (or t), it returns an empty stream.

[plen]

yes i do agree that the word constant is important.

i initially thought that this was a calculus problem and that integration is needed to find the distance-time function...

[Vala]

Code: Select all

#include <stdio.h>


int main(int argc, char **argv)
{
	int v1,t1,v2,t2;
	scanf("%d %d",&v1,&t1);
	printf("%d\n",2*v1*t1);
	scanf("%d %d",&v2,&t2);
	printf("%d",2*v2*t2);
	
	return 0;
}

Why's that wrong ?
I don't believe it....
It specifies the 2 inputs are integers,
and so it is......
Why..................................................
(echo)

[..]

Hi,

I come from the same University and department as you but I am little bit older. Go back to the course homepage to read the example of 10055(AC code, input and output) provided by your tutor. You will know why you WA.

[shamim]

Vala, the problem is you are assuming that there will be exactly two test case, in reality there will be many more case and you should read until EOF.

Code: Select all

while ( scanf("%d %d",&v1,&t1) == 2 )
{
printf("%d\n",2*v1*t1);
}

[..]

I should suggest other people not reply this thread anymore in my last reply, but I forget.
As Vala is doing his homework, and him tutor is already providing enough and easy-reading info to him, he should get the answer himself.

[PerHagen]

???
my code is
#include <stdio.h>
#include <iostream.h>
void main ()
{int a,b ;
while(scanf("%d %d", &a ,&b)==2)
{
if (a<0) a=-a;
cout << 2*a*b<<endl;
}
}
but is w.a. i don't understand
bye

[growup]

Hi, Q10071 asks for outputs of "displacement", instead of "distance".
The former is vector(signed), the latter is scalar(unsigned).

[PerHagen]

and what I/O for is problem???

[PerHagen]

ThX my error was::: a=-a !!!

bye

[tmdrbs6584]

1 2 -> 4
3 4 -> 24
5 6 -> 60
7 8 -> 112
9 0 -> 0

[tmdrbs6584]

you must use long long inteager

[tmdrbs6584]

long long int...