Submission #1211540

#	Time	Username	Problem	Language	Result	Execution time	Memory
1211540		irmuun	The Potion of Great Power (CEOI20_potion)	C++20	0 / 100	144 ms	96500 KiB

potion

#include <bits/stdc++.h>

using namespace std;

#define ll long long
#define pb push_back
#define ff first
#define ss second
#define all(s) s.begin(),s.end()
#define rall(s) s.rbegin(),s.rend()

const int maxn=1e4+5;

namespace {
	int N,D,H[maxn];
	int U,A[maxn],B[maxn];
	set<int>g[maxn][100];
	set<int>st[maxn];
	set<int>s1,s2;
	int blk;
}

void init(int N, int D, int H[]) {
	::N=N,::D=D;
	for(int i=0;i<N;i++){
		::H[i]=H[i];
	}
}

void curseChanges(int U, int A[], int B[]) {
	::U=U;
	for(int i=0;i<U;i++){
		if(A[i]>B[i]) swap(A[i],B[i]);
		::A[i]=A[i];
		::B[i]=B[i];
	}
	blk=sqrt(U);
	for(int i=0;i<U;i++){
		if(st[A[i]].count(B[i])){
			st[A[i]].erase(B[i]);
			st[B[i]].erase(A[i]);
		}
		else{
			st[A[i]].insert(B[i]);
			st[B[i]].insert(A[i]);
		}
		if((i+1)%blk==0){
			int C=(i+1)/blk;
			for(int j=0;j<N;j++){
				g[j][C]=st[j];
			}
		}
	}
}

int question(int x, int y, int v) {
	int ans=1e9;
	s1=g[x][v/blk],s2=g[y][v/blk];
	for(int d=v/blk*blk;d<v;d++){
		if(A[d]==x){
			if(s1.count(B[d])) s1.erase(B[d]);
			else s1.insert(B[d]);
		}
		if(B[d]==x){
			if(s1.count(A[d])) s1.erase(A[d]);
			else s1.insert(A[d]);
		}
		if(A[d]==y){
			if(s2.count(B[d])) s2.erase(B[d]);
			else s2.insert(B[d]);
		}
		if(B[d]==y){
			if(s2.count(A[d])) s2.erase(A[d]);
			else s2.insert(A[d]);
		}
	}
	vector<int>h1,h2;
	for(auto z:s1){
		h1.pb(H[z]);
	}
	for(auto z:s2){
		h2.pb(H[z]);
	}
	sort(all(h1)),sort(all(h2));
	int i=0,j=0;
	while(i<h1.size()&&j<h2.size()){
		ans=min(ans,abs(h1[i]-h2[j]));
		if(h1[i]<=h2[j]) i++;
		else j++;
	}
	return ans;
}

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