結果

問題 No.2295 Union Path Query (Medium)
ユーザー 沙耶花沙耶花
提出日時 2023-05-05 22:57:25
言語 C++17
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 2,734 ms / 4,000 ms
コード長 4,446 bytes
コンパイル時間 4,610 ms
コンパイル使用メモリ 263,260 KB
最終ジャッジ日時 2025-02-12 19:16:40
ジャッジサーバーID
（参考情報） 		judge3 / judge2
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 3
other AC * 53
権限があれば一括ダウンロードができます
コンパイルメッセージ
main.cpp: In function ‘int main()’:
main.cpp:165:22: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
  165 |                 scanf("%d",&t[i]);
      |                 ~~~~~^~~~~~~~~~~~
main.cpp:168:30: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
  168 |                         scanf("%d %d",&a[i],&b[i]);
      |                         ~~~~~^~~~~~~~~~~~~~~~~~~~~
main.cpp:174:30: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
  174 |                         scanf("%d %d",&a[i],&b[i]);
      |                         ~~~~~^~~~~~~~~~~~~~~~~~~~~
main.cpp:189:30: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
  189 |                         scanf("%d",&a[i]);
      |                         ~~~~~^~~~~~~~~~~~
main.cpp:192:30: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
  192 |                         scanf("%d",&a[i]);
      |                         ~~~~~^~~~~~~~~~~~

ソースコード

diff # 

#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 <typename T>
struct perArray{
	struct node{
		T value;
		int l=-1,r=-1;
	};
	
	int sz;
	vector<node> nodes;
	vector<int> roots;
	
	void build(vector<T> v,int now = -1){
		if(now==-1){
			sz = v.size();
			nodes.push_back(node());
			now = 0;
			roots.push_back(0);
		}
		
		if(v.size()==1){
			nodes[now].value = v[0];
			return;
		}
		
		vector<T> l,r;
		rep(i,v.size()){
			if(i<v.size()/2){
				l.push_back(v[i]);
			}
			else{
				r.push_back(v[i]);
			}
		}
		
		nodes[now].l = nodes.size();
		nodes.push_back(node());
		build(l,nodes[now].l);
		
		nodes[now].r = nodes.size();
		nodes.push_back(node());
		build(r,nodes[now].r);
	}

	int set(int p, int ind, T x, int now = -1, int length = -1){
		int ret = roots.size();
		if(now==-1){
			roots.push_back(nodes.size());
			now = nodes.size();
			nodes.push_back(nodes[roots[p]]);
			length = sz;
		}
		
		if(length==1){
			nodes[now].value = x;
		}
		else{
			if(ind < (length>>1)){
				int temp = nodes[now].l;
				nodes[now].l = nodes.size();
				nodes.push_back(nodes[temp]);
				set(p,ind,x,nodes.size()-1,(length>>1));
			}
			else{
				int temp = nodes[now].r;
				nodes[now].r = nodes.size();
				nodes.push_back(nodes[temp]);
				set(p,ind - (length>>1),x,nodes.size()-1,(length+1)>>1);
			}
		}
		return ret;
	}
	
	T get(int p,int ind,int now = -1,int length = -1){
		if(now==-1){
			now = roots[p];
			length = sz;
		}
		
		if(length==1)return nodes[now].value;
		if(ind<(length>>1)){
			return get(p,ind,nodes[now].l,length>>1);
		}
		else{
			return get(p,ind - (length>>1),nodes[now].r,(length+1)>>1);
		}
	}
	
	int size(){
		return sz;
	}
	
};

struct perDsu{
	perArray<int> A;
	vector<int> roots;
	perDsu(int n){
		vector<int> t(n,-1);
		A.build(t);
		roots.push_back(0);
	}
	
	int merge(int p,int a,int b){
		int ret = roots.size();
		int La = leader(p,a);
		int Lb = leader(p,b);
		if(La==Lb)return p;
		if(size(p,La)<size(p,Lb))swap(La,Lb);
		int temp = A.set(roots[p],La,-(size(p,La)+size(p,Lb)));
		roots.push_back(A.set(temp,Lb,La));
		return ret;
	}
	
	bool same(int p,int a,int b){
		return (leader(p,a)==leader(p,b));
	}
	
	int size(int p,int a){
		int temp = A.get(roots[p],a);
		if(temp<0)return -temp;
		return size(p,temp);
	}
	
	int leader(int p,int a){
		int temp = A.get(roots[p],a);
		if(temp<0)return a;
		return leader(p,temp);
	}
	
	vector<vector<int>> groups(int p){
		vector<vector<int>> temp(A.size(),vector<int>());
		rep(i,A.size()){
			temp[leader(p,i)].push_back(i);
		}
		vector<vector<int>> ret;
		rep(i,temp.size()){
			if(temp[i].size()>0)ret.push_back(temp[i]);
		}
		return ret;
	}
	
};

int main(){
	
	int n,x0,q;
	cin>>n>>x0>>q;
	perDsu D(n);
	
	vector<int> t(q+1),a(q+1),b(q+1),p(q+1);
	int x=  x0;
	vector<int> memo(q+1,-1);
	vector<int> is(1,0);
	for(int i=1;i<=q;i++){
		scanf("%d",&t[i]);
		p[i] = p[i-1];
		if(t[i]==1){
			scanf("%d %d",&a[i],&b[i]);
			//cin>>a[i]>>b[i];
			p[i] = D.merge(p[i],a[i],x);
			is.push_back(i);
		}
		if(t[i]==2){
			scanf("%d %d",&a[i],&b[i]);
			if(a[i]==b[i])continue;
			if(D.same(p[i],a[i],b[i])){
				int ok = 0,ng = is.size();
				while(ng-ok>1){
					int mid = (ok+ng)/2;
					if(D.same(p[is[mid]],a[i],b[i]))ng = mid;
					else ok = mid;
				}
				memo[i] = b[is[ok+1]];
				x += memo[i];
				x %= n;
			}
		}
		if(t[i]==3){
			scanf("%d",&a[i]);
		}
		if(t[i]==4){
			scanf("%d",&a[i]);
			x += a[i];
			x %= n;
		}
	}
	//cout<<'a'<<endl;
	x = x0;
	dsu D2(n);
	vector<mint> A(n);
	
	for(int i=1;i<=q;i++){
		if(t[i]==1){
			int la = D2.leader(a[i]),lb = D2.leader(x);
			if(D2.same(la,lb))continue;
			mint tt = D2.size(a[i]);
			tt *= D2.size(x);
			tt *= b[i];
			tt += A[la] + A[lb];
			
			D2.merge(la,lb);
			int lc = D2.leader(la);
			int ld = lc^la^lb;
			A[ld] = 0;
			A[lc] = tt;
		}
		if(t[i]==2){
			if(a[i]==b[i]){
				printf("0\n");
				continue;
			}
			printf("%d\n",memo[i]);
			if(memo[i]!=-1){
				x += memo[i];
				x %= n;
			}
			/*
			if(D.same(p[i],a[i],b[i])){
				x += memo[i];
				x %= n;
				printf("%d\n",memo[i]);
				//cout<<b[ok+1]<<endl;
			}
			else printf("-1\n");
			*/
		}
		if(t[i]==3){
			printf("%d\n",A[D2.leader(a[i])].val());
		}
		if(t[i]==4){
			x += a[i];
			x %= n;
		}
	}
	
	
	return 0;
}
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