結果

問題 No.1324 Approximate the Matrix
ユーザー ああいいああいい
提出日時 2022-04-14 10:20:04
言語 PyPy3
(7.3.15)
結果
AC  
実行時間 1,412 ms / 2,000 ms
コード長 2,620 bytes
コンパイル時間 1,271 ms
コンパイル使用メモリ 87,044 KB
実行使用メモリ 91,896 KB
最終ジャッジ日時 2023-08-25 19:48:06
合計ジャッジ時間 19,574 ms
ジャッジサーバーID
(参考情報)
judge13 / judge14
このコードへのチャレンジ
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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 78 ms
71,568 KB
testcase_01 AC 78 ms
71,200 KB
testcase_02 AC 78 ms
71,268 KB
testcase_03 AC 762 ms
86,320 KB
testcase_04 AC 706 ms
85,692 KB
testcase_05 AC 746 ms
85,436 KB
testcase_06 AC 764 ms
86,124 KB
testcase_07 AC 693 ms
86,212 KB
testcase_08 AC 187 ms
79,996 KB
testcase_09 AC 213 ms
80,320 KB
testcase_10 AC 241 ms
80,124 KB
testcase_11 AC 295 ms
81,772 KB
testcase_12 AC 222 ms
80,048 KB
testcase_13 AC 192 ms
79,700 KB
testcase_14 AC 297 ms
81,760 KB
testcase_15 AC 223 ms
80,340 KB
testcase_16 AC 161 ms
78,128 KB
testcase_17 AC 311 ms
81,744 KB
testcase_18 AC 204 ms
80,560 KB
testcase_19 AC 212 ms
79,608 KB
testcase_20 AC 174 ms
78,812 KB
testcase_21 AC 188 ms
78,264 KB
testcase_22 AC 95 ms
76,312 KB
testcase_23 AC 304 ms
81,388 KB
testcase_24 AC 378 ms
82,160 KB
testcase_25 AC 334 ms
81,820 KB
testcase_26 AC 292 ms
80,940 KB
testcase_27 AC 239 ms
80,812 KB
testcase_28 AC 76 ms
71,432 KB
testcase_29 AC 88 ms
75,624 KB
testcase_30 AC 88 ms
75,680 KB
testcase_31 AC 96 ms
76,332 KB
testcase_32 AC 77 ms
71,368 KB
testcase_33 AC 76 ms
71,536 KB
testcase_34 AC 78 ms
71,364 KB
testcase_35 AC 78 ms
75,316 KB
testcase_36 AC 77 ms
71,368 KB
testcase_37 AC 1,412 ms
90,908 KB
testcase_38 AC 1,349 ms
91,896 KB
testcase_39 AC 1,142 ms
91,472 KB
testcase_40 AC 1,369 ms
90,588 KB
testcase_41 AC 1,356 ms
91,332 KB
testcase_42 AC 92 ms
76,552 KB
testcase_43 AC 93 ms
76,632 KB
testcase_44 AC 93 ms
76,432 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 #

#その2 最初はコストが全部正の場合に使えるダイクストラ
from heapq import heappush,heappop
class MinCostFlow:
    inf = 10 ** 18

    def __init__(self,N):
        self.N = N
        self.G = [[] for _ in range(N)]
        self.H = [0] * N
        self.edge = []

    def add_edge(self,fr,to,cap,cost):
        e = [to,cap,cost,None]
        r = e[3] = [fr,0,-cost,e]
        self.G[fr].append(e)
        self.G[to].append(r)
        self.edge.append(e)
    def get_edge(self,i):
        return self.edge[i]

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

        res = 0
        H = self.H  #ポテンシャル、コストが最初は正なので、最初は0でいい
        prev_v = [0] * N
        prev_e = [None] * N

        d0 = [inf] * N
        dist = [inf] * N
        while f:
            dist[:] = d0
            dist[s] = 0
            q = [(0,s)]
            while q:
                c,v = heappop(q)
                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]
                        prev_v[w] = v
                        prev_e[w] = e
                        heappush(q,(r,w))
            if dist[t] == inf:
                return None
            """
            for i in range(N):
                H[i] += dist[i]
            """
            H = [h + d for h,d in zip(H,dist)]
            d = f
            v = t
            while v != s:
                d = min(d,prev_e[v][1])
                v = prev_v[v]
            f -= d
            res += d * H[t]
            v = t
            while v != s:
                e = prev_e[v]
                e[1] -= d
                e[3][1] += d
                v = prev_v[v]
        return res
import sys
rr = sys.stdin
N,K = map(int,rr.readline().split())
A = list(map(int,rr.readline().split()))
B = list(map(int,rr.readline().split()))
P = [list(map(int,rr.readline().split())) for _ in range(N)]

mincost = MinCostFlow(N + N + 2)
s = N + N
t = N + N + 1
inf = 10000
for i in range(N):
    for j in range(N):
        v = N + j
        for k in range(1,min(A[i],B[j])+1):
            mincost.add_edge(i,v,1,inf + (2 * (k - 1) + 1 - 2 * P[i][j]))
for i in range(N):
    mincost.add_edge(s,i,A[i],0)
for j in range(N):
    mincost.add_edge(j + N,t,B[j],0)
ans = 0
for i in range(N):
    for j in range(N):
        ans += P[i][j] ** 2
ans += mincost.flow(s,t,K) - inf * K
print(ans)
0