結果
| 問題 |
No.1769 Don't Stop the Game
|
| コンテスト | |
| ユーザー |
Nachia
|
| 提出日時 | 2021-11-27 00:25:14 |
| 言語 | C++17(gcc12) (gcc 12.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 190 ms / 3,000 ms |
| コード長 | 3,039 bytes |
| コンパイル時間 | 4,150 ms |
| コンパイル使用メモリ | 128,180 KB |
| 最終ジャッジ日時 | 2025-01-26 02:07:26 |
|
ジャッジサーバーID (参考情報) |
judge1 / judge4 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 28 |
ソースコード
#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
using i32 = int32_t;
using u32 = uint32_t;
using i64 = int64_t;
using u64 = uint64_t;
#define rep(i,n) for(int i=0; i<(n); i++)
class CoordinateCompress {
using Elem = i64;
static const Elem negInf = -1001001001001001001;
vector<pair<Elem, int>> G;
vector<int> res;
vector<Elem> mRealval;
Elem mMaxcoord;
bool ok = true;
void calc() {
if (ok) return;
sort(G.begin(), G.end());
res.resize(G.size());
mRealval.clear();
Elem x = negInf;
int p = -1;
rep(i, G.size()) {
if (x != G[i].first) { x = G[i].first; mRealval.push_back(x); p++; }
res[G[i].second] = p;
}
mMaxcoord = p;
ok = true;
}
public:
int push(Elem x) {
ok = false;
G.push_back({ x,(int)G.size() });
return G.back().second;
}
int operator[](int i) {
calc();
return res[i];
}
Elem realval(int x) {
calc();
return mRealval[x];
}
Elem maxcoord() {
calc();
return mMaxcoord;
}
};
struct Edge{ int to; u32 h; };
int N;
vector<vector<Edge>> E;
vector<int> P;
vector<int> Z;
CoordinateCompress CCH;
vector<u32> H;
// vector<vector<int>> black_stack;
vector<int> black_stack;
vector<int> prev_black;
vector<int> block_size;
vector<int> root_size;
i64 ans;
void dfs(int p = 0, int pre = -1){
if(pre == -1){
black_stack.assign(N,0);
prev_black.assign(N,0);
block_size.assign(N,0);
root_size.assign(N,N);
ans = 0;
}
int h = H[p];
block_size[p] = Z[p];
prev_black[p] = black_stack[h];
if(prev_black[p] != 0) block_size[prev_black[p]] -= Z[p];
else root_size[h] -= Z[p];
for(auto e : E[p]) if(e.to != pre){
int black_stack_tmp = black_stack[H[p]];
black_stack[H[p]] = e.to;
dfs(e.to,p);
black_stack[H[p]] = black_stack_tmp;
}
}
int main(){
cin >> N;
E.resize(N);
rep(i,N-1){
int u,v; u32 c; cin >> u >> v >> c; u--; v--;
E[u].push_back({ v,c });
E[v].push_back({ u,c });
}
vector<int> I = {0};
P.assign(N,-1);
H.assign(N,0);
rep(i,I.size()){
int p = I[i];
for(auto e : E[p]){
if(P[p] == e.to) continue;
I.push_back(e.to);
P[e.to] = p;
H[e.to] = H[p] ^ e.h;
}
}
Z.assign(N,1);
for(int i=N-1; i>=1; i--) Z[P[I[i]]] += Z[I[i]];
rep(i,N) H[i] = CCH.push(H[i]);
rep(i,N) H[i] = CCH[H[i]];
dfs();
i64 ans = 0;
for(int p=1; p<N; p++) ans += block_size[p];
for(int p=1; p<N; p++){
if(prev_black[p] != 0) ans += block_size[prev_black[p]];
else ans += root_size[H[p]];
}
cout << ans << endl;
return 0;
}
struct ios_do_not_sync {
ios_do_not_sync() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
}
} ios_do_not_sync_instance;
Nachia