I receive compilation error but in Borland C++ all ok.
What is problem?

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

void main()
{
    unsigned long N, K, i, position;
    char * mas[30000];
    char * mas1[30000];
    char * mas2[30000];
    char * mas3[10000];

    cin>>N;
    cin>>K;


    for( i = 1 ; i <= N; i++)
    {
      if(i < 30000)
      {
        ultoa(i, mas[i - 1], 10/* size(i)*/);
      }
      else if (i < 60000)
      {
        ultoa(i,  mas1[i - 30001] , 10/* size(i)*/);
      }
      else if (i < 90000)
      {
        ultoa(i,  mas2[i - 60001] , 10/*size(i)*/);
      }
      else if (i < 100000)
      {
        ultoa(i,  mas3[i - 90001] , 10/*size(i)*/);
      }
    }

    i = 0;
    position = 0;
    int step = 0;
    while( i < N)
    {
        while(step < K)
        {
            if(position >= N)
                position = position - N;
            if(position < 30000)
            {
                if(strcmp(mas[position], "0") != 0)
                    step ++;
            }
            else if(position < 60000)
            {
                if(strcmp(mas[position - 30000], "0") != 0)
                    step ++;
            }
            else if(position < 90000)
            {
                if(strcmp(mas[position - 60000], "0") != 0)
                    step ++;
            }
            else if(position < 100000)
            {
                if(strcmp(mas[position - 90000], "0") != 0)
                    step ++;
            }
            position++;
        }
        step = 0;
        position --;
        if(position < 30000)
        {
            cout<<mas[position];
            mas[position] = "0";
        }
        else if(position < 60000)
        {
            cout<<mas1[position];
            mas1[position] = "0";
        }
        else if(position < 90000)
        {
            cout<<mas2[position];
            mas2[position] = "0";
        }
        else if(position < 100000)
        {
            cout<<mas3[position];
            mas3[position] = "0";
        }
        cout<<" ";
        i++;
        position ++;
    }
}

#include <iostream>
#include <stdio.h>
using namespace std;
int main()
{
    int i,n,a;
    double o=0;
    cin>>n;
    for(i=1;i<=n;i++)
    {
        cin>>a;
        o+=a;
    }
    o/=n;
    fprintf(stdout,"%.6lf ",o);
    cout<<endl;
    return 0;
}

Edited by author 07.04.2009 21:17

In English version of the site, the page offering to enter JUDGE_ID and password when viewing source has a button with Russian caption - "Продолжить"

Simple questiong :D
I just can't get it, how should we connect carriages?
If we have "AA" "BA" "AB"
what can we connect
"AABA" or "AAAB"???

#include <iostream>
using namespace std;
int main()
{
    int n,a[1024],br=1,i;
    cin>>n;
    cin>>a[1];
    if(n==1)
    {
        cout<<"1 "<<a[1];
    }
    for(i=2;i<=n;i++)
    {
        cin>>a[i];
        if(a[i]==a[i-1])
        {
            br++;
        }
        if(a[i]!=a[i-1])
        {
            cout<<br<<" "<<a[i-1]<<" ";
            br=1;
        }
        if(i==n)
        {
            cout<<br<<" "<<a[i];
        }
    }
    cout<<endl;
    return 0;
}

Edited by author 07.04.2009 21:12

program Ural1078;

var
  ok:array[1..500,1..500]of boolean;
  x,y,ans:array[1..500]of longint;
  a,b,n,max:longint;

function dfs(o,l:longint):boolean;

var
  i:longint;
  u:boolean;

begin
  u:=false;
  for i:=1 to n do
    if ok[o,i] then u:=u or dfs(i,l+1);
  if max<l then begin
    max:=l;
    u:=true;
  end;
  if u then ans[l]:=o;
  exit(u);
end;

begin
  readln(n);
  fillchar(ok,sizeof(ok),false);
  for a:=1 to n do
    readln(x[a],y[a]);
  for a:=1 to n do
    for b:=1 to n do
      if (x[a]<=x[b])and(y[b]<y[a]) then ok[a,b]:=true;
  max:=0;
  for a:=1 to n do
    if dfs(a,1) then ans[1]:=a;
  writeln(max);
  for a:=max downto 1 do
    write(ans[a],' ');
end.

What is wrong???

    I use greedy to solve this problem.
    First,I scanned all the boxes.If it had N new different coins that Tom wanted.The purchase will added about N*100
    Then,I think Tom would buy this box.And it costs him 100 yen.
    At last.If the purchase>0 ,then I would buy some boxes that Tom did not have been bought.
    I was WA on #1
    Am I wrong?
    At last,I'm sorry for my poor English.
    Thanks a lot.

I spent about 20 attempts on this problem (yea, it's funny). It's all because i got wa12 instead of crash 12 when my recursive dfs led to stack overflow.

P.S. Test 12: n=50000,m=49999, and [probably] graph is line.

Edited by author 06.04.2009 19:04

Who can explane me that question,thank you

    Please try this test.This test helps me a lot.
    20 3
    2 1
    5
    1 4 8 12 16

    The answer is 0.

Help! I get Wrong Answer on test 8...
If someone knows 8th test please post it...thanks

# include <iostream.h>
# include <string.h>
int main ()
{
    char a[2002][202];
    char b[10000][1000];
    char c[10000][1000];
    char d[10000][1000];
    char e[10000][1000];
    int n,i,j=0,k=0,m=0,h=0;
    cin>>n;
    for (i=0;i<2*n;i++)
        cin.getline (a[i],2002,'\n');
    for (i=0;i<2*n;i=i+2)
    {
        if (a[i+1][0]-'0'=='S'-'0')
        {
            strcpy(b[j],a[i]);
            j++;
        }
        else if (a[i+1][0]-'0'=='H'-'0')
        {
            strcpy(c[k],a[i]);
            k++;
        }
        else if (a[i+1][0]-'0'=='G'-'0')
        {
            strcpy(d[m],a[i]);
            m++;
        }
        else if (a[i+1][0]-'0'=='R'-'0')
        {
            strcpy(e[h],a[i]);
            h++;
        }
    }
    cout<<"Slytherin:"<<endl;;
    for (i=1;i<=j;i++)
        cout<<b[i]<<endl;
    cout<<'\n'<<"Hufflepuff:"<<endl;
    for (i=1;i<=k;i++)
        cout<<c[i]<<endl;
    cout<<'\n'<<"Gryffindor:"<<endl;
    for (i=1;i<=m;i++)
        cout<<d[i]<<endl;
    cout<<'\n'<<"Ravenclaw:"<<endl;
    for (i=1;i<=h;i++)
        cout<<e[i]<<endl;
    return 0;
}





Tell mi what to do,please, and sorry for my English.

I spend 3 hours searching to find the bug, but i found nothing, pls help me solve it...

Rejudging of the contest after the contest is a VERY BAD THING! I am SURE that a lot of people who found solution for problem F can find error and write own sqrt function for int64.
BUT if you have not tests that fails this on the contest you CAN NOT do rejudge after IT. YOU CAN CHANGE THE DESCRIPTION OF THE PROBLEM TO SATISFY THE DATA SET BUT YOU CAN NOT CHANGE DATA SET!
In this case results of the contest is not objective at all.

Edited by author 05.04.2009 01:58

Я построил дерево, программа работает правильно, но требует около 90МБ памяти. Как можно сократить количество используемой на дерево памяти?

sos!! thanks

I try to solve it for O(n * log(n) * log(n)). I don't understand why I can't passed it? Please help me. I can send my code.

Edited by author 11.03.2007 15:15

10 2 5 1
1 6
1 4
4 5
5 8
7 9

Answer:
5
1 2 3 4 5