結果
問題 | No.399 動的な領主 |
ユーザー | ei1333333 |
提出日時 | 2016-07-16 14:13:57 |
言語 | C++11 (gcc 11.4.0) |
結果 |
RE
(最新)
AC
(最初)
|
実行時間 | - |
コード長 | 4,945 bytes |
コンパイル時間 | 1,901 ms |
コンパイル使用メモリ | 179,180 KB |
実行使用メモリ | 23,712 KB |
最終ジャッジ日時 | 2024-11-07 19:26:12 |
合計ジャッジ時間 | 7,918 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge5 |
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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 | RE | - |
testcase_01 | RE | - |
testcase_02 | RE | - |
testcase_03 | RE | - |
testcase_04 | RE | - |
testcase_05 | RE | - |
testcase_06 | RE | - |
testcase_07 | RE | - |
testcase_08 | RE | - |
testcase_09 | RE | - |
testcase_10 | RE | - |
testcase_11 | RE | - |
testcase_12 | RE | - |
testcase_13 | RE | - |
testcase_14 | RE | - |
testcase_15 | RE | - |
testcase_16 | RE | - |
testcase_17 | RE | - |
testcase_18 | RE | - |
コンパイルメッセージ
main.cpp: In member function ‘int BinaryIndexedTree::add(int, int)’: main.cpp:11:3: warning: no return statement in function returning non-void [-Wreturn-type] 11 | } | ^ main.cpp: In function ‘int main()’: main.cpp:168:8: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 168 | scanf("%d", &N); | ~~~~~^~~~~~~~~~ main.cpp:172:10: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 172 | scanf("%d %d", &u, &v); | ~~~~~^~~~~~~~~~~~~~~~~ main.cpp:180:8: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 180 | scanf("%d", &Q); | ~~~~~^~~~~~~~~~ main.cpp:183:10: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 183 | scanf("%d %d", &A, &B); | ~~~~~^~~~~~~~~~~~~~~~~
ソースコード
#include<bits/stdc++.h> using namespace std; struct BinaryIndexedTree { vector< int > data; BinaryIndexedTree(int sz): data(++sz, 0) {}; int add(int k, int x) { for(++k; k < data.size(); k += k & -k) data[k] += x; } int query(int k) { if(k < 0) return(0); int ret = 0; for(++k; k > 0; k -= k & -k) ret += data[k]; return(ret); } }; struct CentroidPathDecomposition { struct Centroid { int ParIndex, ParDepth, Deep; vector< int > node; inline int size() { return(node.size()); } inline int &operator[](int k) { return(node[k]); } inline pair< int, int > Up() { return(make_pair(ParIndex, ParDepth)); } }; vector< vector< int > > graph; vector< int > SubTreeSize, NextPath; vector< int > TreeIndex, TreeDepth; vector< Centroid > Centroids; void BuildSubTreeSize() { stack< pair< int, int > > s; s.push({0, -1}); while(!s.empty()) { auto p = s.top(); s.pop(); if(~SubTreeSize[p.first]) { NextPath[p.first] = -1; for(auto& to : graph[p.first]) { if(p.second == to) continue; SubTreeSize[p.first] += SubTreeSize[to]; if(NextPath[p.first] == -1 || SubTreeSize[NextPath[p.first]] < SubTreeSize[to]) { NextPath[p.first] = to; } } } else { s.push(p); SubTreeSize[p.first] = 1; for(auto& to : graph[p.first]) { if(p.second != to) s.push({to, p.first}); } } } } void BuildPath() { stack< pair< int, int > > s; Centroids.push_back((Centroid){-1, -1, 0}); s.push({0, -1}); TreeIndex[0] = 0; while(!s.empty()) { auto p = s.top(); s.pop(); TreeDepth[p.first] = Centroids[TreeIndex[p.first]].size(); for(auto& to : graph[p.first]) { if(p.second != to) { if(to == NextPath[p.first]) { // Centroid-Path TreeIndex[to] = TreeIndex[p.first]; } else { // Not Centroid-Path TreeIndex[to] = Centroids.size(); Centroids.push_back((Centroid){TreeIndex[p.first], TreeDepth[p.first], Centroids[TreeIndex[p.first]].Deep + 1}); } s.push({to, p.first}); } } Centroids[TreeIndex[p.first]].node.push_back(p.first); } } void AddEdge(int x, int y) { graph[x].push_back(y); graph[y].push_back(x); } void Build() { BuildSubTreeSize(); BuildPath(); } inline int size() { return(Centroids.size()); } inline pair< int, int > Information(int idx) { return(make_pair(TreeIndex[idx], TreeDepth[idx])); } inline Centroid &operator[](int k) { return(Centroids[k]); } inline int LCA(int a, int b) // これを流用する { int TreeIdxA, TreeDepthA, TreeIdxB, TreeDepthB; tie(TreeIdxA, TreeDepthA) = Information(a); tie(TreeIdxB, TreeDepthB) = Information(b); while(TreeIdxA != TreeIdxB) { if(Centroids[TreeIdxA].Deep > Centroids[TreeIdxB].Deep) { tie(TreeIdxA, TreeDepthA) = Centroids[TreeIdxA].Up(); } else { tie(TreeIdxB, TreeDepthB) = Centroids[TreeIdxB].Up(); } } if(TreeDepthA > TreeDepthB) swap(TreeDepthA, TreeDepthB); return(Centroids[TreeIdxA][TreeDepthA]); } CentroidPathDecomposition(int SZ) { graph.resize(SZ); SubTreeSize.assign(SZ, -1); NextPath.resize(SZ); TreeIndex.resize(SZ); TreeDepth.resize(SZ); } inline void AddPath(int a, int b); }; vector< BinaryIndexedTree > bits; inline void CentroidPathDecomposition::AddPath(int a, int b) { int TreeIdxA, TreeDepthA, TreeIdxB, TreeDepthB; tie(TreeIdxA, TreeDepthA) = Information(a); tie(TreeIdxB, TreeDepthB) = Information(b); while(TreeIdxA != TreeIdxB) { if(Centroids[TreeIdxA].Deep > Centroids[TreeIdxB].Deep) { bits[TreeIdxA].add(0, 1); bits[TreeIdxA].add(TreeDepthA + 1, -1); tie(TreeIdxA, TreeDepthA) = Centroids[TreeIdxA].Up(); } else { bits[TreeIdxB].add(0, 1); bits[TreeIdxB].add(TreeDepthB + 1, -1); tie(TreeIdxB, TreeDepthB) = Centroids[TreeIdxB].Up(); } } if(TreeDepthA > TreeDepthB) swap(TreeDepthA, TreeDepthB); bits[TreeIdxA].add(TreeDepthA, 1); bits[TreeIdxB].add(TreeDepthB + 1, -1); } int main() { int N, Q; scanf("%d", &N); CentroidPathDecomposition tree(N); for(int i = 0; i < N - 1; i++) { int u, v; scanf("%d %d", &u, &v); tree.AddEdge(--u, --v); } tree.Build(); for(int i = 0; i < tree.size(); i++) { bits.emplace_back(BinaryIndexedTree(tree[i].size() + 1)); } scanf("%d", &Q); while(Q--) { int A, B; scanf("%d %d", &A, &B); tree.AddPath(--A, --B); } long long ret = 0; for(int i = 0; i < tree.size(); i++) { for(int j = 0; j < tree[i].size(); j++) { int sum = bits[i].query(j); ret += 1LL * sum * (sum + 1) / 2; } } cout << ret << endl; }