Submission #1141178

#	Time	Username	Problem	Language	Result	Execution time	Memory
1141178		Noproblem29	Collapse (JOI18_collapse)	C++20	5 / 100	15090 ms	9028 KiB

collapse

#include "collapse.h"
#include <bits/stdc++.h>
using namespace std;
const int N=1e5+100;
#define ll long long
int n,m,q;
int p[N];
int r[N];
int dsu(int x){
	if(p[x]<0)return x;
	return p[x]=dsu(p[x]);
}
bool merge(int x,int y){
	x=dsu(x);
	y=dsu(y);
	if(x==y)return 0;
	if(p[x]<p[y])swap(x,y);
	p[y]+=p[x];
	p[x]=y;
	return 1;
}
vector<int> simulateCollapse(int _n,vector<int> T,vector<int> X,vector<int> Y,vector<int> W,vector<int> P) {
	n=_n;
	m=X.size();
	q=W.size();
	vector<int>ans(q,0);
	{
		map<pair<int,int>,int>s;
		for(int i=m-1;i>=0;i--){
			if(X[i]>Y[i])swap(X[i],Y[i]);
			r[i]=m+1;
			if(T[i]==1){
				s[{X[i],Y[i]}]=i;
			}
			else{
				r[i]=s[{X[i],Y[i]}];
				if(r[i]==0){
					r[i]=m+1;
				}
			}
		}
	}
	for(int i=0;i<q;i++){
		ans[i]=n;
		for(int j=0;j<n;j++){
			p[j]=-1;
		}
		for(int j=0;j<=W[i];j++){
			if(X[j]<=P[i]&&P[i]+1<=Y[j])continue;
			if(T[j]==0&&r[j]>W[i]){
				if(merge(X[j],Y[j])){
					ans[i]--;
				}
			}
		}
	}

	return ans;
}

• Subtask 1: 5 / 5
• Subtask 2: 0 / 30
• Subtask 3: 0 / 30
• Subtask 4: 0 / 35