Submission #1159173

#	Time	Username	Problem	Language	Result	Execution time	Memory
1159173		shn	The Potion of Great Power (CEOI20_potion)	C++20	0 / 100	671 ms	327680 KiB

potion

#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define len(s) (int)(s.size())
#define F first
#define S second
#define pll pair < int , int >

const int N = 2e5;

int n , d , h[N];
int u , a[N], b[N];

pll last[N];

vector < int > g[N][2];

vector < int > f[N];

map < pll , int > mp;

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++){
		a[i] = A[i];
		b[i] = B[i];
		if(!last[a[i]].F) g[i][0].pb(b[i]);
		else{
			for(int it : g[last[a[i]].F][last[a[i]].S]) g[i][0].pb(it);
			if(!mp[{a[i] , b[i]}]) g[i][0].pb(b[i]);
			else{
				vector < int > zam;
				for(int it : g[i][0]){
					if(it != b[i]) zam.pb(it);
				}
				g[i][0].clear();
				for(int it : zam) g[i][0].pb(it);
			}
		}
		if(!last[b[i]].F) g[i][1].pb(a[i]);
		else{
			for(int it : g[last[b[i]].F][last[b[i]].S]) g[i][1].pb(it);
			if(!mp[{a[i] , b[i]}]) g[i][1].pb(a[i]);
			else{
				vector < int > zam;
				for(int it : g[i][1]){
					if(it != a[i]) zam.pb(it);
				}
				g[i][1].clear();
				for(int it : zam) g[i][1].pb(it);
			}
		}
		last[a[i]] = {i , 0};
		last[b[i]] = {i , 1};
		mp[{a[i] , b[i]}] ^= 1;
		mp[{b[i] , a[i]}] ^= 1;
		f[a[i]].pb(i);
		f[b[i]].pb(i);
	}
}

int find(int x , int w){
	int l = 0 , r = len(f[x]) - 1 , res = u;
	while(l <= r){
		int mid = (l + r) >> 1;
		if(f[x][mid] <= w){
			l = mid + 1;
			res = mid;
		}
		else{
			r = mid - 1;
		}
	}
	return res;
}

int question(int x, int y, int v) {
	int lstx = find(x , v) , lsty = find(y , v);
	if(lstx == u || lsty == u) return 1000000000;
	int mn = 1000000000;
	int c = 0 , d = 0;
	if(a[f[x][lstx]] != x) c++;
	if(a[f[y][lsty]] != y) d++;
	for(int it : g[f[x][lstx]][c]){
		for(int it2 : g[f[y][lsty]][d]){
			mn = min(mn , abs(h[it] - h[it2]));
		}
	}
	return mn;
}

// int main(){
// 	
// }

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