結果
| 問題 |
No.2294 Union Path Query (Easy)
|
| コンテスト | |
| ユーザー |
沙耶花
|
| 提出日時 | 2023-05-05 22:30:16 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 656 ms / 4,000 ms |
| コード長 | 4,106 bytes |
| コンパイル時間 | 4,521 ms |
| コンパイル使用メモリ | 258,776 KB |
| 最終ジャッジ日時 | 2025-02-12 18:44:47 |
|
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 46 |
ソースコード
#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using mint = modint998244353;
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf32 1000000001
#define Inf64 4000000000000000001
template <class S>
struct potentialized_dsu {
public:
potentialized_dsu() : _n(0) {}
potentialized_dsu(int n) : _n(n), parent_or_size(n, -1), d(n) {}
int merge(int a, int b, S v) {
assert(0 <= a && a < _n);
assert(0 <= b && b < _n);
int x = leader(a), y = leader(b);
if (x == y) return x;
if (-parent_or_size[x] < -parent_or_size[y]){
std::swap(x, y);
std::swap(a, b);
S t;
v = t - v;
}
v += diff(x,a);
v -= diff(y,b);
d[y] += d[x] + v;
parent_or_size[x] += parent_or_size[y];
parent_or_size[y] = x;
return x;
}
bool same(int a, int b) {
assert(0 <= a && a < _n);
assert(0 <= b && b < _n);
return leader(a) == leader(b);
}
int leader(int a) {
assert(0 <= a && a < _n);
if (parent_or_size[a] < 0) return a;
int l = leader(parent_or_size[a]);
if(parent_or_size[a] != l){
d[a] += d[parent_or_size[a]];
parent_or_size[a] = l;
}
return parent_or_size[a];
}
int size(int a) {
assert(0 <= a && a < _n);
return -parent_or_size[leader(a)];
}
S diff(int a,int b){
assert(0 <= a && a < _n);
assert(0 <= b && b < _n);
leader(a);
leader(b);
return d[b] - d[a];
}
std::vector<std::vector<int>> groups() {
std::vector<int> leader_buf(_n), group_size(_n);
for (int i = 0; i < _n; i++) {
leader_buf[i] = leader(i);
group_size[leader_buf[i]]++;
}
std::vector<std::vector<int>> result(_n);
for (int i = 0; i < _n; i++) {
result[i].reserve(group_size[i]);
}
for (int i = 0; i < _n; i++) {
result[leader_buf[i]].push_back(i);
}
result.erase(
std::remove_if(result.begin(), result.end(),
[&](const std::vector<int>& v) { return v.empty(); }),
result.end());
return result;
}
int _n;
// root node: -1 * component size
// otherwise: parent
std::vector<int> parent_or_size;
std::vector<S> d;
};
struct xorint{
using mytype = xorint;
int v = 0;
mytype operator+(mytype another)const{
return (mytype(*this)+=another);
}
mytype &operator+=(const mytype &another){
(*this).v ^= another.v;
return (*this);
}
mytype operator-(mytype another)const{
return (mytype(*this)-=another);
}
mytype &operator-=(const mytype &another){
(*this).v ^= another.v;
return (*this);
}
};
int main(){
int n,x0,q;
cin>>n>>x0>>q;
potentialized_dsu<xorint> D(n);
vector<int> t(q),a(q),b(q);
int x= x0;
rep(i,q){
cin>>t[i];
if(t[i]==1){
cin>>a[i]>>b[i];
xorint tx;
tx.v = b[i];
D.merge(a[i],x,tx);
}
if(t[i]==2){
cin>>a[i]>>b[i];
if(D.same(a[i],b[i])){
x += D.diff(a[i],b[i]).v;
x %= n;
}
}
if(t[i]==3){
cin>>a[i];
}
if(t[i]==4){
cin>>a[i];
x += a[i];
x %= n;
}
}
//cout<<'a'<<endl;
x = x0;
dsu D2(n);
vector<array<int,30>> A(n);
vector<int> vs(n);
rep(i,n){
int r = D.diff(i,D.leader(i)).v;
vs[i] = r;
array<int,30> ta;
rep(j,30){
ta[j] = (r>>j)&1;
}
A[i] = ta;
}
rep(i,q){
if(t[i]==1){
int la = D2.leader(a[i]),lb = D2.leader(x);
if(D2.same(la,lb))continue;
D2.merge(la,lb);
int lc = D2.leader(la);
int ld = lc^la^lb;
rep(j,30){
A[lc][j] += A[ld][j];
A[ld][j] = 0;
}
}
if(t[i]==2){
if(D2.same(a[i],b[i])){
x += D.diff(a[i],b[i]).v;
x %= n;
cout<<D.diff(a[i],b[i]).v<<endl;
}
else{
cout<<-1<<endl;
}
}
if(t[i]==3){
auto AA = A[D2.leader(a[i])];
mint ans =0;
rep(j,30){
mint ttt = mint(2).pow(j);
ttt *= AA[j];
ttt *= D2.size(a[i]) - AA[j];
ans += ttt;
}
cout<<ans.val()<<endl;
}
if(t[i]==4){
x += a[i];
x %= n;
}
}
return 0;
}
沙耶花