:::--->    a = b ^ c —-> c = a ^ b b = a ^ c,就是异或递推的关系。

//

a = b ^ c —-> c = a ^ b b = a ^ c

#include

"

iostream

"

#include

"

math.h

"

using

namespace

std;

int

main()

{

int

n,i;

int

a[

1000

];

char

ch;

while

(cin

>>

n)

{

for

(i

=

0

;i

<

n;i

++

)

scanf(

"

%d

"

,

&

a[i]);

int

count

=

0

;

char

xx;

for

(ch

=

'

A

'

; ch

<=

'

Z

'

;

++

ch)

{

count

=

0

;

for

(i

=

0

; i

<

n; i

++

)

{

xx

=

a[i]

^

ch;

if

(xx

<=

'

Z

'

&&

xx

>=

'

A

'

) count

++

;

}

if

(count

==

n)

break

;

}

for

(i

=

0

;i

<

n;i

++

)

{

printf(

"

%c

"

,a[i]

^

ch);

}

printf(

"

\n

"

);

}

return

0

;

}