1

//

include file

2

#include

<

cstdio

>

3

#include

<

cstdlib

>

4

#include

<

cstring

>

5

#include

<

cmath

>

6

#include

<

cctype

>

7

#include

<

ctime

>

8

9

#include

<

iostream

>

10

#include

<

sstream

>

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#include

<

fstream

>

12

#include

<

iomanip

>

13

#include

<

bitset

>

14

#include

<

strstream

>

15

16

#include

<

algorithm

>

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#include

<

string

>

18

#include

<

vector

>

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#include

<

queue

>

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#include

<

set

>

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#include

<

list

>

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#include

<

functional

>

23

24

using

namespace

std;

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26

//

typedef

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typedef

long

long

LL;

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typedef unsigned

long

long

ULL;

29

30

//

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#define

read freopen("in.txt","r",stdin)

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#define

write freopen("out.txt","w",stdout)

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#define

FORi(a,b,c) for(int i=(a);i<(b);i+=c)

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#define

FORj(a,b,c) for(int j=(a);j<(b);j+=c)

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#define

FORk(a,b,c) for(int k=(a);k<(b);k+=c)

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#define

FORp(a,b,c) for(int p=(a);p<(b);p+=c)

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#define

FORii(a,b,c) for(int ii=(a);ii<(b);ii+=c)

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#define

FORjj(a,b,c) for(int jj=(a);jj<(b);jj+=c)

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#define

FORkk(a,b,c) for(int kk=(a);kk<(b);kk+=c)

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#define

FF(i,a) for(int i=0;i<(a);i+++)

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#define

FFD(i,a) for(int i=(a)-1;i>=0;i--)

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#define

Z(a) (a<<1)

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#define

Y(a) (a>>1)

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const

double

eps

=

1e

-

6

;

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const

double

INFf

=

1e10;

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const

int

INFi

=

1000000000

;

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const

double

Pi

=

acos(

-

1.0

);

50

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template

<

class

T

>

inline T sqr(T a){

return

a

*

a;}

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template

<

class

T

>

inline T TMAX(T x,T y)

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{

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if

(x

>

y)

return

x;

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return

y;

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}

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template

<

class

T

>

inline T TMIN(T x,T y)

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{

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if

(x

<

y)

return

x;

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return

y;

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}

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template

<

class

T

>

inline

void

SWAP(T

&

x,T

&

y)

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{

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T t

=

x;

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x

=

y;

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y

=

t;

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}

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template

<

class

T

>

inline T MMAX(T x,T y,T z)

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{

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return

TMAX(TMAX(x,y),z);

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}

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//

code begin

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int

A[

6

],Amin,Amax,ans;

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int

main()

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{

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read;

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write;

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while

(scanf(

"

%d %d %d %d %d %d

"

,A,A

+

1

,A

+

2

,A

+

3

,A

+

4

,A

+

5

)

!=-

1

)

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{

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if

(A[

0

]

+

A[

1

]

+

A[

2

]

+

A[

3

]

+

A[

4

]

+

A[

5

]

==

0

)

break

;

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Amin

=

INFi;

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Amax

=

-

1

;

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ans

=

0

;

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FORi(

0

,

6

,

1

)

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{

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ans

+=

A[i];

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Amin

=

TMIN(Amin,A[i]);

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Amax

=

TMAX(Amax,A[i]);

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}

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printf(

"

%g\n

"

,(ans

-

Amin

-

Amax

+

0.0

)

/

4.0

);

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}

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return

0

;

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}