m,n,p,q = map(int, input().split())
cnt = 0

while m > 0:
    for month in range(12):
        cnt += 1
        m -= n
        if(month >= p-1 and month <= p+q-1):
            m -= n
        #print(m)
        if m <= 0:
            print(cnt, '  (break)')
            break