I got WA #4 with such code:

#include <cstdio>
#include <iostream>
#include <cmath>

using namespace std;

int main()
{
    int n;
    double a, sum = 0.0;

    scanf("%d", &n);
    for (int i = 0; i < n; i++)
    {
        scanf("%le", &a);
        sum += a;
    }

    printf("%.15e", sum / n);

    return 0;
}

WA #5 with such code:

#include <cstdio>
#include <iostream>
#include <cmath>

using namespace std;

int main()
{
    int n;
    double a, sum = 0.0;

    scanf("%d", &n);
    for (int i = 0; i < n; i++)
    {
        scanf("%le", &a);
        sum += a;
    }

    printf("%.7e", sum / n);

    return 0;
}

WA #6 with such code:

#include <cstdio>
#include <iostream>
#include <cmath>

using namespace std;

int main()
{
    int n;
    double a, sum = 0.0;

    scanf("%d", &n);
    for (int i = 0; i < n; i++)
    {
        scanf("%le", &a);
        sum += a;
    }

    printf("%.8e", sum / n);

    return 0;
}

AC with such code:

#include <cstdio>
#include <iostream>
#include <cmath>

using namespace std;

int main()
{
    int n;
    double a, sum = 0.0;

    scanf("%d", &n);
    for (int i = 0; i < n; i++)
    {
        scanf("%le", &a);
        sum += a;
    }

    printf("%.15e", sum / n);

    return 0;
}

But, connecting to the problem statements, "The offset should be printed with at least six digits after decimal point."

How to show 6 digits after the point using double/float variable?

can you give me some tests????????????

#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

program ex;
var n,m,i:integer;
    ans:real;
begin
  readln (n);
  for i:=1 to n do
    begin
      read (m);
      ans:=ans+m;
    end;
  ans:=ans/n;
  writeln (ans:0:6);
end.

does the problem require only finding average that i have done still WA1. can please someone give me some test cases??

Edited by author 08.07.2008 11:04

Edited by author 08.07.2008 11:05