結果
| 問題 |
No.2296 Union Path Query (Hard)
|
| コンテスト | |
| ユーザー |
shkiiii_
|
| 提出日時 | 2024-04-29 08:39:35 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
TLE
|
| 実行時間 | - |
| コード長 | 3,586 bytes |
| コンパイル時間 | 4,510 ms |
| コンパイル使用メモリ | 386,792 KB |
| 最終ジャッジ日時 | 2025-02-21 09:28:17 |
|
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | TLE * 1 -- * 44 |
ソースコード
#include<bits/stdc++.h>
// #include<atcoder/all>
#include<boost/multiprecision/cpp_int.hpp>
using namespace std;
// using namespace atcoder;
using bint = boost::multiprecision::cpp_int;
using ll = long long;
using ull = unsigned long long;
using P = pair<ll,ll>;
using vi = vector<ll>;
using vvi = vector<vi>;
using vvvi = vector<vvi>;
#define rep(i,n) for(ll i = 0;i < (ll)n;i++)
#define ALL(x) (x).begin(),(x).end()
#define sz(c) ((ll)(c).size())
#define LB(A,x) (int)(lower_bound(A.begin(),A.end(),x)-A.begin())
#define UB(A,x) (int)(upper_bound(A.begin(),A.end(),x)-A.begin())
// #define MOD 1000000007
#define MOD 998244353
template<typename T>using min_priority_queue=priority_queue<T,vector<T>,greater<T>>;
template<typename T>ostream&operator<<(ostream&os,vector<T>&v){for(int i = 0;i < v.size();i++)os<<v[i]<<(i+1!=v.size()?" ":"");return os;}
template<typename T>istream&operator>>(istream&is,vector<T>&v){for(T&in:v)is>>in;return is;}
template<typename T1,typename T2>ostream&operator<<(ostream&os,pair<T1,T2>&p){os<<p.first<<" "<<p.second;return os;}
template<typename T1,typename T2>istream&operator>>(istream&is,pair<T1,T2>&p){is>>p.first>>p.second;return is;}
class UnionFind{
public:
vector<int> par;
UnionFind(long long size) : par(size,-1){}
bool unite(int x,int y){
x = root(x),y = root(y);
if(x == y)return false;
if(par[y] < par[x])swap(x,y);
par[x] += par[y];
par[y] = x;
return true;
}
bool find(int x,int y){
return root(x) == root(y);
}
int root(int x){
return par[x] < 0 ? x : par[x] = root(par[x]);
}
int size(int x){
return -par[root(x)];
}
};
const int LG_N = 18;
const int MX_N = 200000;
vi d(MX_N);
vector<vector<int>> nxt(MX_N,vector<int>(LG_N));
vector<vector<P>> v(MX_N);
vector<vector<int>> cand(MX_N,vector<int>(2));
UnionFind uf(MX_N);
inline void dfs(int ov,int pre){
nxt[ov][0] = pre;
rep(i,LG_N-1)nxt[ov][i+1] = nxt[nxt[ov][i]][i];
for(auto [nv,we] : v[ov]){
if(nv == pre)continue;
d[nv] = d[ov] + we;
dfs(nv,ov);
}
}
ll LCA(ll a,ll b){
if(d[a] < d[b])swap(a,b);
for(int i = LG_N-1;i >= 0;i--)if(d[nxt[a][i]] >= d[b])a = nxt[a][i];
if(a == b)return a;
for(int i = LG_N-1;i >= 0;i--)if(nxt[a][i] != nxt[b][i])a = nxt[a][i],b = nxt[b][i];
return nxt[a][0];
}
inline ll dist(ll a,ll b){
if(!uf.find(a,b))return -1;
return d[a] + d[b]-2*d[LCA(a,b)];
}
inline void ch(ll a,ll b){
ll mx = dist(cand[a][0],cand[a][1]);
P k = {cand[a][0],cand[a][1]};
ll l = dist(cand[b][0],cand[b][1]);
if(l > mx){
k = {cand[b][0],cand[b][1]};
mx = l;
}
rep(i,2)rep(j,2){
l = dist(cand[a][i],cand[b][j]);
if(l > mx){
mx = l;
k = {cand[a][i],cand[b][j]};
}
}
cand[b][0] = k.first;
cand[b][1] = k.second;
}
int main(){
ios_base::sync_with_stdio(0), cin.tie(0);
ll n,X,Q;
cin >> n >> X >> Q;
rep(i,n)rep(j,LG_N)nxt[i][j] = i;
rep(i,n)rep(j,2)cand[i][j] = i;
while(Q--){
ll t;cin >> t;
if(t == 1){
ll a,w;cin >> a >> w;
ll b = X;
if(uf.size(b) < uf.size(a))swap(b,a);
d[a] = d[b] + w;
dfs(a,b);
v[a].emplace_back(b,w);
v[b].emplace_back(a,w);
a = uf.root(a),b = uf.root(b);
uf.unite(b,a);
ch(a,b);
}else if(t == 2){
ll a,b;cin >> a >> b;
ll res = dist(a,b);
cout << res << "\n";
if(res != -1)X = (X + res)%n;
}else if(t == 3){
ll a;cin >> a;
a = uf.root(a);
cout << dist(cand[a][0],cand[a][1]) << "\n";
}else{
ll val;cin >> val;
X = (X + val)%n;
}
}
return 0;
}
shkiiii_