Submission #590338

#	Time	Username	Problem	Language	Result	Execution time	Memory
590338		dnialh	Rope (JOI17_rope)	Pypy 3	80 / 100	1422 ms	262144 KiB

rope

from collections import Counter
 
import sys as sus
input = sus.stdin.readline
 
n, m = map(int, input().split())
 
c = list(range(1, m + 1))
c = list(map(int, input().split()))
 
ct = Counter(c)
ctl = [0] * (m + 1)
for i in range(1, m + 1):
    ctl[i] = ct[i]
o = ct.most_common()
 
del ct
 
odd = Counter()
eve = Counter()
 
for i in range(n - 1):
    s = min(c[i], c[i + 1])
    b = max(c[i], c[i + 1])
    if i % 2:
        odd[(s << 20) |  b] += 1
    else:
        eve[(s << 20) |  b] += 1
 
for v in odd:
    odd[v] = min(odd[v], eve[v])
    
del eve
 
out = []
 
 
for i in range(1, m + 1):
    res = 0
    for v, vc in o:
        if v == i:
            continue
 
        bl = odd[(i << 20) | v] + odd[v << 20 | i]
        #br = eve[(i << 20) | v] + eve[v << 20 | i]
 
        bad = bl
        #print(bl, br)
        #bad = min(bl, br)
 
        res = max(res, vc - bad)
 
        if bad == 0:
            break
    out.append(n - res - ctl[i])
    
print('\n'.join(map(str, out)))

• Subtask 1: 15 / 15
• Subtask 2: 30 / 30
• Subtask 3: 10 / 10
• Subtask 4: 25 / 25
• Subtask 5: 0 / 20