oj.uz

Submission #797392

# Submission time Handle Problem Language Result Execution time Memory
797392 2023-07-29T10:18:44 Z alvingogo Ancient Books (IOI17_books) C++14
0 / 100
 1 ms 304 KB 
#include "books.h"
#include <bits/stdc++.h>
#pragma GCC optimize("Ofast")
#define AquA cin.tie(0);ios_base::sync_with_stdio(0);
#define fs first
#define sc second
#define p_q priority_queue
using namespace std;

typedef long long ll;
struct DSU{
	vector<int> bo;
	void init(int x){
		bo.resize(x);
		iota(bo.begin(),bo.end(),0);
	}
	int find(int x){
		return bo[x]==x?x:bo[x]=find(bo[x]);
	}
	int merge(int x,int y){
		x=find(x);
		y=find(y);
		if(x==y){
			return 0;
		}
		bo[x]=y;
		return 1;
	}
}dsu;
ll minimum_walk(vector<int> p, int s) {
	ll ans=0;
	int n=p.size();
	dsu.init(n);
	vector<int> bo(n,-1),k(n),pre(n);
	for(int i=0;i<n;i++){
		if(bo[i]==-1){
			pre[i]++;
			int cnt=0;
			int f=0;
			for(int x=i;bo[x]==-1;x=p[x]){
				dsu.merge(x,i);
				bo[x]=i;
				cnt++;
				f=max(f,x);
			}
			if(cnt>=2){
				k[i]=1;
			}
			pre[f]--;
		}
		ans+=abs(i-p[i]);
	}
	for(int i=1;i<n;i++){
		pre[i]+=pre[i-1];
	}
	k[bo[s]]=1;
	for(int i=0;i+1<n;i++){
		if(pre[i]){
			dsu.merge(i,i+1);
		}
	}
	int mn=-1;
	vector<pair<int,pair<int,int> > > e;
	for(int i=0;i<n;i++){
		if(k[bo[i]]){
			if(mn!=-1){
				e.push_back({i-mn,{i,mn}});
			}
			mn=i;
		}
	}
	sort(e.begin(),e.end());
	return ans;
	for(auto h:e){
		ans+=2*dsu.merge(h.sc.fs,h.sc.sc)*h.fs;
	}
	return ans;
}

Subtask #1
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 296 KB 3rd lines differ - on the 1st token, expected: '6', found: '4'
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 296 KB 3rd lines differ - on the 1st token, expected: '6', found: '4'
2 Halted 0 ms 0 KB -

Subtask #3
0 / 28.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 296 KB 3rd lines differ - on the 1st token, expected: '6', found: '4'
2 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 304 KB 3rd lines differ - on the 1st token, expected: '3304', found: '2744'
2 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 296 KB 3rd lines differ - on the 1st token, expected: '6', found: '4'
2 Halted 0 ms 0 KB -