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 10:35:17
言語 PyPy3
(7.3.15)
結果
AC  
実行時間 958 ms / 2,000 ms
コード長 2,617 bytes
コンパイル時間 168 ms
コンパイル使用メモリ 82,500 KB
実行使用メモリ 89,984 KB
最終ジャッジ日時 2024-06-06 13:56:43
合計ジャッジ時間 12,399 ms
ジャッジサーバーID
(参考情報)
judge3 / judge5
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 37 ms
53,376 KB
testcase_01 AC 39 ms
52,992 KB
testcase_02 AC 39 ms
53,248 KB
testcase_03 AC 549 ms
84,448 KB
testcase_04 AC 500 ms
83,828 KB
testcase_05 AC 541 ms
84,352 KB
testcase_06 AC 528 ms
83,728 KB
testcase_07 AC 549 ms
84,100 KB
testcase_08 AC 126 ms
78,080 KB
testcase_09 AC 147 ms
78,164 KB
testcase_10 AC 168 ms
78,592 KB
testcase_11 AC 210 ms
79,492 KB
testcase_12 AC 163 ms
78,444 KB
testcase_13 AC 128 ms
77,820 KB
testcase_14 AC 205 ms
79,736 KB
testcase_15 AC 157 ms
78,436 KB
testcase_16 AC 111 ms
76,308 KB
testcase_17 AC 224 ms
79,604 KB
testcase_18 AC 145 ms
78,164 KB
testcase_19 AC 155 ms
78,280 KB
testcase_20 AC 120 ms
77,412 KB
testcase_21 AC 126 ms
77,440 KB
testcase_22 AC 58 ms
68,096 KB
testcase_23 AC 213 ms
79,352 KB
testcase_24 AC 270 ms
81,276 KB
testcase_25 AC 229 ms
80,236 KB
testcase_26 AC 205 ms
79,728 KB
testcase_27 AC 182 ms
79,112 KB
testcase_28 AC 37 ms
52,992 KB
testcase_29 AC 50 ms
62,848 KB
testcase_30 AC 48 ms
61,952 KB
testcase_31 AC 58 ms
65,280 KB
testcase_32 AC 41 ms
53,376 KB
testcase_33 AC 37 ms
53,248 KB
testcase_34 AC 38 ms
53,376 KB
testcase_35 AC 42 ms
58,624 KB
testcase_36 AC 38 ms
53,248 KB
testcase_37 AC 861 ms
89,984 KB
testcase_38 AC 864 ms
89,600 KB
testcase_39 AC 958 ms
89,636 KB
testcase_40 AC 863 ms
89,856 KB
testcase_41 AC 883 ms
89,856 KB
testcase_42 AC 57 ms
69,504 KB
testcase_43 AC 57 ms
69,760 KB
testcase_44 AC 57 ms
69,632 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 ** 5

    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 = 400
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