Nothing special, just some corner cases

n = int(input())arr = [int(i) for i in input().strip().split()]# Collect rec = []i = 0while i < n - 1:    if arr[i] > arr[i + 1]:        inx = i        cnt = 1        while i < n - 1 and arr[i] > arr[i + 1]:            cnt += 1            i += 1        rec.append((inx, cnt))    else:        i += 1# Checkif len(rec) == 1:    if rec[0][1] == 2:        if rec[0][0] + 1 < n - 1 and arr[rec[0][0]] > arr[rec[0][0] + 2]:            print ("no")        else:            print ("yes")            print ("swap %d %d" % (rec[0][0] + 1, rec[0][0] + 2))    elif rec[0][1] > 2:        if rec[0][0] + rec[0][1] - 1 < n - 1 and arr[rec[0][0]] > arr[rec[0][0] + rec[0][1]]:            print ("no")        else:            print ("yes")            print ("reverse %d %d" % (rec[0][0] + 1, rec[0][0] + rec[0][1]))elif len(rec) == 2 and rec[0][1] == 2 and rec[1][1] == 2:    print ("yes")    print ("swap %d %d" % (rec[0][0] + 1, rec[1][0] + 2))else:    print ("no")