結果
| 問題 |
No.1054 Union add query
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2020-08-20 03:52:28 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 3,403 bytes |
| コンパイル時間 | 2,235 ms |
| コンパイル使用メモリ | 197,416 KB |
| 最終ジャッジ日時 | 2025-01-13 04:10:20 |
|
ジャッジサーバーID (参考情報) |
judge3 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 5 WA * 3 |
ソースコード
//#define _GLIBCXX_DEBUG
#include <bits/stdc++.h>
#define rep(i, n) for(int i=0; i<n; ++i)
#define all(v) v.begin(), v.end()
#define rall(v) v.rbegin(), v.rend()
using namespace std;
using ll = int64_t;
using ld = long double;
using P = pair<int, int>;
using vs = vector<string>;
using vi = vector<int>;
using vvi = vector<vi>;
template<class T> using PQ = priority_queue<T>;
template<class T> using PQG = priority_queue<T, vector<T>, greater<T> >;
const int INF = 0xccccccc;
const ll LINF = 922337203685477580LL;
template<typename T1, typename T2>
inline bool chmax(T1 &a, T2 b) {return a < b && (a = b, true);}
template<typename T1, typename T2>
inline bool chmin(T1 &a, T2 b) {return a > b && (a = b, true);}
template<typename T1, typename T2>
istream &operator>>(istream &is, pair<T1, T2> &p) { return is >> p.first >> p.second;}
template<typename T1, typename T2>
ostream &operator<<(ostream &os, const pair<T1, T2> &p) { return os << p.first << ' ' << p.second;}
struct UnionFind {
vector<int> par; // 親を指すvector,-par[親]は木のサイズ
UnionFind(int n):par(n, -1) {} // uniteで親を埋め込んでいく必要あり
inline void init() {
rep(i, par.size()) par[i] = -1;
}
int root(int x) { // 親をたどる&データの整理
if(par[x] < 0) return x;
return par[x] = root(par[x]);
}
bool unite(int x, int y) { // データの結合
x = root(x);
y = root(y);
if(x == y) return false;
//if(par[x] > par[y]) swap(x, y);
par[x] += par[y];
par[y] = x;
return true;
}
bool same(int x, int y) {return root(x) == root(y);} // 所属判定
int size(int x) {return -par[root(x)];} // 木のサイズ
};
const int N = 5e5+10;
//head
int n, q;
string t;
int a[N], b[N];
UnionFind uft(N);
int last[N], front[N];
int nex[N];
int place[N];
P info[N];
int bit[N];
void add(int i, int x) {
while(i <= n) {
bit[i] += x;
i += i&-i;
}
}
int sum(int i) {
int res = 0;
while(i) {
res += bit[i];
i &= i-1;
}
return res;
}
signed main() {
ios::sync_with_stdio(false);
cin.tie(0);
memset(nex, -1, sizeof(nex));
cin >> n >> q;
rep(i, n) {
info[i] = P(i+1, i+2);
last[i] = i;
front[i] = i;
}
rep(i, q) {
char u;
cin >> u >> a[i] >> b[i];
a[i]--; b[i]--;
t += u;
if(u == '1' and !uft.same(a[i], b[i])) {
a[i] = uft.root(a[i]);
b[i] = uft.root(b[i]);
if(a[i] > b[i]) swap(a[i], b[i]);
nex[last[uft.root(a[i])]] = front[uft.root(b[i])];
last[uft.root(a[i])] = last[uft.root(b[i])];
front[uft.root(b[i])] = front[uft.root(a[i])];
uft.unite(a[i], b[i]);
}
}
int now = 0;
int kk = -1;
rep(i, n) {
if(now == -1) {
kk = i;
break;
}
place[now] = i;
now = nex[now];
}
if(kk != -1) {
for(int i = 1; i < n; i++) {
if(!place[i]) place[i] = kk++;
}
}
//rep(i, n) cout << place[i] << endl;
uft.init();
rep(i, q) {
if(t[i] == '1') {
a[i] = place[a[i]];
b[i] = place[b[i]];
if(uft.same(a[i], b[i])) continue;
P &u = info[uft.root(a[i])], &v = info[uft.root(b[i])];
u.first = v.first = min(u.first, v.first);
u.second = v.second = max(u.second, v.second);
uft.unite(a[i], b[i]);
}
else if(t[i] == '2') {
a[i] = uft.root(place[a[i]]);
b[i]++;
add(info[a[i]].first, b[i]);
add(info[a[i]].second, -b[i]);
}
else {
a[i] = place[a[i]];
cout << sum(a[i]+1) << '\n';
}
//cout << i << endl;
//rep(i, n) cout << sum(i+1) << (i == n-1?'\n':' ');
}
}