#/***********************************************************
#    maxmin.rb -- 最大値・最小値
#***********************************************************/
def max2(x, y); x > y ? x : y; end
def min2(x, y); x < y ? x : y; end

def findmax(n,  a)
    max = a[0]
    for i in 1...n
        if (a[i] > max); max = a[i]; end
    end
    return max
end

def findmin(n,  a)
    min = a[0]
    for i in 1...n
        if (a[i] < min); min = a[i]; end
    end
    return min
end

def findmaxmin(n,  a)
    if (n & 1 == 1);       max = min = a[0]
    elsif (a[0] > a[1]);   max = a[0];  min = a[1]
    else;                  max = a[1];  min = a[0]
    end
    i = 2 - (n & 1);  while(i < n) 
        a1 = a[i];  a2 = a[i + 1]
        if (a1 > a2) 
            if (a1 > max); max = a1; end
            if (a2 < min); min = a2; end
        else 
            if (a2 > max); max = a2; end
            if (a1 < min); min = a1; end
        end
        i += 2
    end
    return max, min
end

def maxn(*a)          # n 個の  の最大値 
    a.max
end

a = [ 1, 7, 4 ]

printf("max2(1, 7) = %d\n", max2(1, 7))
printf("min2(1, 7) = %d\n", min2(1, 7))

printf("a = [ 1, 7, 4 ]\n")
printf("findmax(3, a) = %d\n", findmax(3, a))
printf("findmin(3, a) = %d\n", findmin(3, a))

max, min = findmaxmin(3, a)
printf("max, min = findmaxmin(3, a)\n")
printf("max = %d, min = %d\n", max, min)

printf("maxn(1, 7, 4) = %d\n", maxn(1, 7, 4))

exit 0