Submission #349711

#	Time	Username	Problem	Language	Result	Execution time	Memory
349711		Bill_00	The Potion of Great Power (CEOI20_potion)	C++14	38 / 100	1270 ms	262148 KiB

potion

#include <bits/stdc++.h>
#define N 200001
#define pb push_back
using namespace std;
int h[N],pre[N];
unordered_map<int,vector<int> >v[N];
vector<int>day[N];
void init(int n,int d, int H[]){
	for(int i=0;i<n;i++) h[i]=H[i];
}

void curseChanges(int u, int A[], int B[]){
	for(int i=1;i<=u;i++){
		int a=A[i-1],b=B[i-1];
		day[a].pb(i);
		day[b].pb(i);
		if(pre[a]==0){
			v[a][i].pb(b);
			pre[a]=i;
		}
		else{
			bool flag=0;
			for(int j:v[a][pre[a]]){
				if(j==b){
					flag=1;
					continue;
				}
				v[a][i].pb(j);
			}
			if(flag==0) v[a][i].pb(b);
			pre[a]=i;
		}
		if(pre[b]==0){
			v[b][i].pb(a);
			pre[b]=i;
		}
		else{
			bool flag=0;
			for(int j:v[b][pre[b]]){
				if(j==a){
					flag=1;
					continue;
				}
				v[b][i].pb(j);
			}
			if(flag==0) v[b][i].pb(a);
			pre[b]=i;
		}
	}
}

int question(int x, int y, int z) {
	int ans=1e9;
	int id=upper_bound(day[x].begin(),day[x].end(),z)-day[x].begin();
	--id;
	if(id<0){
		return ans;
	}
	int a=day[x][id];
	id=upper_bound(day[y].begin(),day[y].end(),z)-day[y].begin();
	--id;
	if(id<0){
		return ans;
	}
	int b=day[y][id];
	// cout << a << ' ' << b << '\n';
	if(v[x][a].size()==0 || v[y][b].size()==0){
		return ans;
	}
	vector<int>xx,yy;
	for(int V:v[y][b]){
		yy.pb(h[V]);
	}
	sort(yy.begin(),yy.end());
	for(int U:v[x][a]){
		int id=lower_bound(yy.begin(),yy.end(),h[U])-yy.begin();
		ans=min(ans,abs(h[U]-yy[max(0,id-1)]));
		int r=yy.size()-1;
		ans=min(ans,abs(yy[min(id,r)]-h[U]));
	}
	return ans;
}

• Subtask 1: 0 / 0
• Subtask 2: 17 / 17
• Subtask 3: 0 / 14
• Subtask 4: 0 / 18
• Subtask 5: 21 / 21
• Subtask 6: 0 / 30