結果

問題 No.1288 yuki collection
ユーザー persimmon-persimmonpersimmon-persimmon
提出日時 2021-02-17 10:07:40
言語 PyPy3
(7.3.15)
結果
AC  
実行時間 1,048 ms / 5,000 ms
コード長 1,897 bytes
コンパイル時間 204 ms
コンパイル使用メモリ 82,212 KB
実行使用メモリ 89,988 KB
最終ジャッジ日時 2024-09-13 20:29:42
合計ジャッジ時間 23,926 ms
ジャッジサーバーID
(参考情報)
judge3 / judge2
このコードへのチャレンジ
(要ログイン)

テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 42 ms
53,120 KB
testcase_01 AC 46 ms
53,376 KB
testcase_02 AC 42 ms
53,120 KB
testcase_03 AC 78 ms
73,216 KB
testcase_04 AC 40 ms
52,608 KB
testcase_05 AC 41 ms
52,736 KB
testcase_06 AC 46 ms
59,392 KB
testcase_07 AC 40 ms
53,348 KB
testcase_08 AC 96 ms
76,076 KB
testcase_09 AC 80 ms
74,664 KB
testcase_10 AC 94 ms
75,956 KB
testcase_11 AC 70 ms
69,504 KB
testcase_12 AC 99 ms
76,152 KB
testcase_13 AC 985 ms
87,728 KB
testcase_14 AC 947 ms
87,512 KB
testcase_15 AC 824 ms
85,044 KB
testcase_16 AC 793 ms
84,908 KB
testcase_17 AC 1,012 ms
87,864 KB
testcase_18 AC 1,001 ms
88,516 KB
testcase_19 AC 956 ms
87,704 KB
testcase_20 AC 895 ms
84,588 KB
testcase_21 AC 990 ms
86,448 KB
testcase_22 AC 1,023 ms
89,856 KB
testcase_23 AC 1,009 ms
89,988 KB
testcase_24 AC 997 ms
87,900 KB
testcase_25 AC 914 ms
84,324 KB
testcase_26 AC 1,014 ms
88,368 KB
testcase_27 AC 540 ms
82,984 KB
testcase_28 AC 613 ms
84,188 KB
testcase_29 AC 528 ms
83,148 KB
testcase_30 AC 156 ms
79,328 KB
testcase_31 AC 171 ms
79,232 KB
testcase_32 AC 171 ms
79,500 KB
testcase_33 AC 888 ms
85,780 KB
testcase_34 AC 1,017 ms
87,180 KB
testcase_35 AC 1,022 ms
86,648 KB
testcase_36 AC 1,043 ms
84,804 KB
testcase_37 AC 1,048 ms
84,496 KB
testcase_38 AC 449 ms
80,628 KB
testcase_39 AC 476 ms
81,140 KB
testcase_40 AC 104 ms
78,188 KB
testcase_41 AC 40 ms
52,992 KB
testcase_42 AC 40 ms
52,992 KB
権限があれば一括ダウンロードができます

ソースコード

diff #

import sys
input=sys.stdin.readline
# 最小費用流
from heapq import heappush, heappop
class MinCostFlow:
  INF = 10**18

  def __init__(self, N):
    self.N = N
    self.G = [[] for i in range(N)]

  def add_edge(self, fr, to, cap, cost):
    forward = [to, cap, cost, None]
    backward = forward[3] = [fr, 0, -cost, forward]
    self.G[fr].append(forward)
    self.G[to].append(backward)

  def flow(self, s, t, f):
    N = self.N; G = self.G
    INF = MinCostFlow.INF

    res = 0
    H = [0]*N
    prv_v = [0]*N
    prv_e = [None]*N

    d0 = [INF]*N
    dist = [INF]*N

    while f:
      dist[:] = d0
      dist[s] = 0
      que = [(0, s)]

      while que:
        c, v = heappop(que)
        if dist[v] < c:
          continue
        r0 = dist[v] + H[v]
        for e in G[v]:
          w, cap, cost, _ = e
          if cap > 0 and r0 + cost - H[w] < dist[w]:
            dist[w] = r = r0 + cost - H[w]
            prv_v[w] = v; prv_e[w] = e
            heappush(que, (r, w))
      if dist[t] == INF:
        return res
        return None

      for i in range(N):
        H[i] += dist[i]

      d = f; v = t
      while v != s:
        d = min(d, prv_e[v][1])
        v = prv_v[v]
      f -= d
      res += d * H[t]
      v = t
      while v != s:
        e = prv_e[v]
        e[1] -= d
        e[3][1] += d
        v = prv_v[v]
    return res

def main1(n,s,v):
  mcf=MinCostFlow(n+1)
  inf=10**9
  # n->n+1
  ary=[n+1]*5
  ary[4]=n
  d={'y':0,'u':1,'k':2,'i':3}
  for i in range(n-1,-1,-1):
    k=d[s[i]]
    if ary[k]<n+1:
      mcf.add_edge(i,ary[k],n//4,0)
    if ary[k+1]<n+1:
      mcf.add_edge(i,ary[k+1],1,inf-v[i])
    ary[k]=i
  if ary[0]==n+1:
    return 0
  mcf.add_edge(ary[0],n,n//4,inf*4)
  return 4*inf*(n//4)-mcf.flow(ary[0],n,n//4)

if __name__=='__main__':
  n=int(input())
  s=list(input())
  v=list(map(int,input().split()))
  ret1=main1(n,s,v)
  print(ret1)
0