結果
問題 | No.860 買い物 |
ユーザー | vwxyz |
提出日時 | 2023-12-01 14:31:01 |
言語 | PyPy3 (7.3.15) |
結果 |
AC
|
実行時間 | 857 ms / 1,000 ms |
コード長 | 4,152 bytes |
コンパイル時間 | 306 ms |
コンパイル使用メモリ | 82,304 KB |
実行使用メモリ | 129,060 KB |
最終ジャッジ日時 | 2024-09-26 15:36:21 |
合計ジャッジ時間 | 8,668 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge4 |
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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 | 47 ms
54,144 KB |
testcase_01 | AC | 46 ms
54,784 KB |
testcase_02 | AC | 47 ms
54,656 KB |
testcase_03 | AC | 46 ms
54,400 KB |
testcase_04 | AC | 47 ms
54,912 KB |
testcase_05 | AC | 48 ms
55,424 KB |
testcase_06 | AC | 138 ms
78,848 KB |
testcase_07 | AC | 853 ms
127,532 KB |
testcase_08 | AC | 857 ms
127,148 KB |
testcase_09 | AC | 843 ms
127,276 KB |
testcase_10 | AC | 844 ms
127,132 KB |
testcase_11 | AC | 235 ms
127,016 KB |
testcase_12 | AC | 257 ms
123,816 KB |
testcase_13 | AC | 715 ms
129,060 KB |
testcase_14 | AC | 805 ms
126,256 KB |
testcase_15 | AC | 408 ms
121,712 KB |
testcase_16 | AC | 835 ms
125,124 KB |
testcase_17 | AC | 264 ms
126,596 KB |
ソースコード
import sys readline=sys.stdin.readline from collections import defaultdict class UnionFind: def __init__(self,N,label=None,f=None,weighted=False,rollback=False): self.N=N self.parents=[None]*self.N self.size=[1]*self.N self.roots={i for i in range(self.N)} self.label=label if self.label!=None: self.label=[x for x in label] self.f=f self.weighted=weighted if self.weighted: self.weight=[0]*self.N self.rollback=rollback if self.rollback: self.operate_list=[] self.operate_set=[] def Find(self,x): stack=[] while self.parents[x]!=None: stack.append(x) x=self.parents[x] if not self.rollback: if self.weighted: w=0 for y in stack[::-1]: self.parents[y]=x w+=self.weight[y] self.weight[y]=w else: for y in stack[::-1]: self.parents[y]=x return x def Union(self,x,y,w=None): root_x=self.Find(x) root_y=self.Find(y) if self.rollback: self.operate_list.append([]) self.operate_set.append([]) if root_x==root_y: if self.weighted: if self.weight[y]-self.weight[x]==w: return True else: return False else: if self.size[root_x]<self.size[root_y]: x,y=y,x root_x,root_y=root_y,root_x if self.weighted: w=-w if self.rollback: self.operate_list[-1].append((self.parents,root_y,self.parents[root_y])) self.operate_list[-1].append((self.size,root_x,self.size[root_x])) self.operate_set[-1].append(root_y) if self.label!=None: self.operate_list[-1]((self.label,root_x,self.label[root_x])) if self.weighted: self.operate_list[-1].append((self.weight,root_y,self.weight[root_y])) self.parents[root_y]=root_x self.size[root_x]+=self.size[root_y] self.roots.remove(root_y) if self.label!=None: self.label[root_x]=self.f(self.label[root_x],self.label[root_y]) if self.weighted: self.weight[root_y]=w+self.weight[x]-self.weight[y] def Size(self,x): return self.size[self.Find(x)] def Same(self,x,y): return self.Find(x)==self.Find(y) def Label(self,x): return self.label[self.Find(x)] def Weight(self,x,y): root_x=self.Find(x) root_y=self.Find(y) if root_x!=root_y: return None return self.weight[y]-self.weight[x] def Roots(self): return list(self.roots) def Linked_Components_Count(self): return len(self.roots) def Linked_Components(self): linked_components=defaultdict(list) for x in range(self.N): linked_components[self.Find(x)].append(x) return linked_components def Rollback(self): assert self.rollback if self.operate_list: for lst,x,v in self.operate_list.pop(): lst[x]=v for x in self.operate_set.pop(): self.roots.add(x) return True else: return False def __str__(self): linked_components=defaultdict(list) for x in range(self.N): linked_components[self.Find(x)].append(x) return "\n".join(f"{r}: {linked_components[r]}" for r in sorted(list(linked_components.keys()))) N=int(readline()) C,D=[],[] for i in range(N): c,d=map(int,readline().split()) C.append(c) D.append(d) edges=[] for i in range(1,N): edges.append((D[i],i-1,i)) for i in range(N): edges.append((C[i],N,i)) edges.sort() UF=UnionFind(N+1) ans=sum(C) for w,i,j in edges: if not UF.Same(i,j): UF.Union(i,j) ans+=w print(ans)