N = int(input())
arr = [int(x) for x in input().split()]
if len(arr) < 2:
    print("Cool Array")
else:    
    ranges = ((index, index-value) for index, value in enumerate(arr))
    ranges = sorted(ranges, key=lambda x: (-x[1], x[0]))
    j, jd = ranges[0]
    i, id = ranges[-1]
    if jd == -1 and id == -1:
        print("Cool Array")
    else:
        t = [x for x in ranges if x[1] == id]
        if len(t) > 1:
            i, id = min(t, key=lambda x: x[0])
        print(i+1, j+1)