! yukicoder My Practice
! author: Leonardone @ NEETSDKASU

PROGRAM yukicoder
    INTEGER :: n, a(1000), i, j, p, t
    REAL :: ans
    
    READ(*,*) n
    READ(*,*) a(1:n)
    
    DO i = 1, n - 1
        p = i
        DO j = i + 1, n
            IF (a(j) < a(p)) THEN
                p = j
            END IF
        END DO
        t = a(i)
        a(i) = a(p)
        a(p) = t
    END DO
    
    p = n / 2
    IF (MOD(n, 2) == 0) THEN
        ans = a(p) + a(p + 1)
        ans = ans / 2.0
    ELSE
        ans = a(p + 1)
    END IF
    
    PRINT '(F0.0)', ans
    
    STOP
END PROGRAM yukicoder