ENG  RUSTimus Online Judge
Online Judge
Problems
Authors
Online contests
About Online Judge
Frequently asked questions
Site news
Webboard
Links
Problem set
Submit solution
Judge status
Guide
Register
Update your info
Authors ranklist
Current contest
Scheduled contests
Past contests
Rules
back to board

Discussion of Problem 1161. Stripies

why WA on #5
Posted by chs040701 25 Aug 2008 12:28
#include <cstdlib>
#include <iostream>
#include <cmath>

using namespace std;

int Compare(const void *elem1, const void *elem2)
{
return *((int *)(elem1)) - *((int *)(elem2));
}

int main(int argc, char *argv[])
{long n,i,j;
 double d[10010];
 cin>>n;
 for(i=0;i<n;i++)cin>>d[i];
 qsort(d,n,sizeof(double),Compare);
 for(i--;i>0;i--)
 {d[i-1]=(2*sqrt(d[i-1]*d[i]));
 qsort(d,i-1,sizeof(double),Compare);
 /*for(j=0;j<n;j++)cout<<d[j]<<" ";*/}
 printf("%.2lf",d[0]);
    system("PAUSE");
    return EXIT_SUCCESS;
}

here's my source
can you give any hints?
Re: why WA on #5
Posted by pasin30055 8 Oct 2008 22:18
I got WA on #5 too
here is my code
#include<stdio.h>
#include<math.h>
int a[105];
int main()
{
    int n,i,b;
    double ans;
    scanf("%d",&n);
    for(i=0;i<n;i++)
    {
     scanf("%d",&b);
     a[b]++;
    }
    ans=0;
    for(i=100;i>=1;i--)
    {
    if(a[i]!=0)
    {
     if(ans==0)
     ans=(double)i;
     else
     ans=2*sqrt((double)i*ans);
     a[i]--;
     i++;
    }
    else;
    }
    printf("%.2lf",ans);
    scanf(" ");
    return 0;
}
please help me find my mistake
Re: why WA on #5
Posted by kal1sha 10 May 2009 01:02
WA
int Compare(const void *elem1, const void *elem2)
{
return *((int *)(elem1)) - *((int *)(elem2));
}

AC
int Compare(const void *elem1, const void *elem2)
{
return *((double*)(elem1)) - *((double*)(elem2));
}