結果
問題 | No.399 動的な領主 |
ユーザー | pekempey |
提出日時 | 2016-07-19 10:19:50 |
言語 | C++11 (gcc 11.4.0) |
結果 |
AC
|
実行時間 | 291 ms / 2,000 ms |
コード長 | 3,026 bytes |
コンパイル時間 | 1,647 ms |
コンパイル使用メモリ | 161,892 KB |
実行使用メモリ | 10,368 KB |
最終ジャッジ日時 | 2024-11-07 19:39:37 |
合計ジャッジ時間 | 4,866 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge3 |
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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 | 2 ms
5,248 KB |
testcase_01 | AC | 1 ms
5,248 KB |
testcase_02 | AC | 2 ms
5,248 KB |
testcase_03 | AC | 1 ms
5,248 KB |
testcase_04 | AC | 3 ms
5,248 KB |
testcase_05 | AC | 23 ms
5,248 KB |
testcase_06 | AC | 291 ms
10,240 KB |
testcase_07 | AC | 291 ms
10,240 KB |
testcase_08 | AC | 281 ms
10,240 KB |
testcase_09 | AC | 287 ms
10,240 KB |
testcase_10 | AC | 4 ms
5,248 KB |
testcase_11 | AC | 16 ms
5,248 KB |
testcase_12 | AC | 187 ms
10,240 KB |
testcase_13 | AC | 174 ms
10,240 KB |
testcase_14 | AC | 62 ms
10,368 KB |
testcase_15 | AC | 186 ms
10,240 KB |
testcase_16 | AC | 207 ms
10,368 KB |
testcase_17 | AC | 278 ms
10,368 KB |
testcase_18 | AC | 287 ms
10,368 KB |
コンパイルメッセージ
main.cpp: In function ‘int main()’: main.cpp:141:22: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 141 | scanf("%d %d", &u, &v); | ~~~~~^~~~~~~~~~~~~~~~~ main.cpp:154:22: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 154 | scanf("%d %d", &u, &v); | ~~~~~^~~~~~~~~~~~~~~~~
ソースコード
#include <bits/stdc++.h> using namespace std; //************************************************************** // link-cut tree //************************************************************** struct node { node *parent = nullptr; node *lch = nullptr; node *rch = nullptr; bool reversed = false; int size = 1; long long sum = 1; long long val = 1; long long lazy = 0; }; int size(node *x) { if (x == nullptr) return 0; return x->size; } long long sum(node *x) { if (x == nullptr) return 0; return x->sum; } void update(node *x) { if (x == nullptr) return; x->size = 1 + size(x->lch) + size(x->rch); x->sum = x->val + sum(x->lch) + sum(x->rch); } void push(node *x) { if (x == nullptr) return; if (x->lazy == 0 && !x->reversed) return; for (node *y : { x->lch, x->rch }) if (y != nullptr) { y->reversed ^= x->reversed; y->sum += x->lazy * size(y); y->lazy += x->lazy; } if (x->reversed) swap(x->lch, x->rch); x->reversed = false; x->val += x->lazy; x->lazy = 0; update(x); } //************************************************************** // link-cut tree basic operation //************************************************************** enum { LEFT, RIGHT }; bool is_root(node *x) { return x->parent == nullptr || (x->parent->lch != x && x->parent->rch != x); } int parent_direction(node *x) { if (is_root(x)) return -1; return x->parent->rch == x ? LEFT : RIGHT; } void connect(node *child, node *parent, int dir) { if (parent != nullptr && dir != -1) { (dir == RIGHT ? parent->lch : parent->rch) = child; update(parent); } if (child != nullptr) child->parent = parent; } void raise(node *x) { node *y = x->parent; node *z = y->parent; int xdir = parent_direction(x); int ydir = parent_direction(y); connect(xdir == LEFT ? x->lch : x->rch, y, xdir); connect(y, x, xdir ^ 1); connect(x, z, ydir); } void splay(node *x) { push(x); while (!is_root(x)) { push(x->parent->parent); push(x->parent); push(x); if (is_root(x->parent)) { raise(x); } else if (parent_direction(x) == parent_direction(x->parent)) { raise(x->parent); raise(x); } else { raise(x); raise(x); } } update(x); } void expose(node *x) { node *rch = nullptr; for (node *y = x; y != nullptr; y = y->parent) { splay(y); y->rch = rch; rch = y; update(y); } splay(x); } void cut(node *x) { expose(x); x->lch->parent = nullptr; x->lch = nullptr; update(x); } void link(node *x, node *p) { expose(x); expose(p); connect(x, p, LEFT); } void evert(node *x) { expose(x); x->reversed = true; } int main() { int n; cin >> n; vector<node *> tr(n); for (int i = 0; i < n; i++) tr[i] = new node(); for (int i = 0; i < n - 1; i++) { int u, v; scanf("%d %d", &u, &v); u--; v--; evert(tr[v]); link(tr[v], tr[u]); } long long ans = 0; int Q; cin >> Q; for (int ii = 0; ii < Q; ii++) { int u, v; scanf("%d %d", &u, &v); u--; v--; evert(tr[u]); expose(tr[v]); ans += sum(tr[v]); tr[v]->lazy++; } cout << ans << endl; }