OJ Board

Are there any hopes including Python in the number of allowed languages now? Now it becomes to more widespread among the competiotions. For example, it is allowed at Google Code Jam.

Thanks a lot. It helped.

I submitted the following code and got the compilation error (jeez... the second one in two days):

#include <math.h>
#include <stdio.h>

int
main()
{
int i, n;
scanf("%d", &n);

for (i = 0; i < n; i++)
{
double b, h, r0, tau, m, res;
scanf("%lf %lf", &b, &h);

b /= 2;
r0 = 2*b*h / (b ...

Oh, thanks! So, it just needs It's curious that my compiler was quite satisfied with this code without that include.[/code]

This code is clearly compiled by my gcc 3.3.4, but I get "Compile Error" response from the Online Judge:

#include <iostream>
#include <string>

using namespace std;

long long
my_a2i(string s, int base)
{
long long res = 0;
int sign = 1;
unsigned i = 0;

if (s[0] == '-')
{
sign = -1;
i = 1 ...

Thanks for your advices!

I've got a compilation error with the following code. Could anybody help me?

#include <stdio.h>
#include <math.h>

int
main()
{
while (1)
{
int v;
scanf("%d", &v);

if (v == 0) break;

int p = 1;
int pp;
for (pp = 2; pp < 32; pp++)
{
int r = exp(log(v)/pp);

int rr = 1;
int i;
for (i ...

I have troubles with this problem for a long time.

I've already checked all the things, mentioned at the board. I got Time Limit and when I've made some kind of dynamic programming instead of usual simulation, I've got the runtime error, which ment that the ball returnes to some point with ...

Oh, thank you! The trouble was really in that point.

Osan,

Thank you for your answer, but I tried not to swap values if first is greater than the second and nothing changed. Besides, it is not clear from the statement of the problem, what to output in case of L>H. The sequence starting with 1 has length 3 (it is the example in the problem), the ...

It's funny, that everything is exactly the same that I've thought. May be somebody can check the code:
[c]#include <stdio.h>

unsigned next(unsigned a) {
if (a == 1) return 0;

if (a % 2 == 0) return a / 2;
else return 3*a + 1;
}

int seq_len(unsigned a) {
int steps = 0;

if (a == 1) return 3 ...

I've already spent plenty of time on this problem and I am really curious where do I have mistakes. I've used the function for calculation that I already succesfully used in the problem 694 together with the long-arithmetic engine that I also used in several other problems.

So, my questions:

1 ...