oj.uz

Submission #953301

# Submission time Handle Problem Language Result Execution time Memory
953301 2024-03-25T19:38:49 Z waldi Ancient Books (IOI17_books) C++17
0 / 100
 1 ms 348 KB 
#include "books.h"
#include <bits/stdc++.h>
#define FOR(i,p,k) for(int i=(p);i<=(k);++i)
#define REP(i,n) FOR(i,0,(n)-1)
#define ssize(x) (int((x).size()))
#define all(x) (x).begin(),(x).end()
using namespace std;
typedef long long ll;

ll minimum_walk(vector<int> perm, int start){
	int n = ssize(perm);
	ll wyn = 0ll;
	REP(i, n) wyn += abs(i-perm[i]);
	
	set<int> ciekawe;
	REP(i, n) if(perm[i] != i) ciekawe.emplace(i);
	
	vector<int> lewo, prawo;
	vector<int> odw(n, -1);
	REP(i, n) if(odw[i] < 0){
		int mini = i, maks = i;
		for(int w = i; odw[w] < 0; w = perm[w]){
			odw[w] = ssize(lewo);
			mini = min(mini, w);
			maks = max(maks, w);
		}
		lewo.emplace_back(mini);
		prawo.emplace_back(maks);
	}
	
	bool cokolwiek = 0;
	int l = start, p = start;
	while(ssize(ciekawe)){
		auto it = ciekawe.lower_bound(l);
		if(it != ciekawe.end() && *it <= p){
			l = min(l, lewo[odw[*it]]);
			p = max(p, prawo[odw[*it]]);
			ciekawe.erase(it);
			continue;
		}
		
		if(cokolwiek){
			if(it != ciekawe.end()) wyn += (*it-p)<<1, p = *it, ciekawe.erase(it);
			else wyn += (l-*prev(it))<<1, l = *prev(it), ciekawe.erase(prev(it));
			continue;
		}
		
		if(l <= *ciekawe.begin() || *prev(ciekawe.end()) <= p){
			cokolwiek = 1;
			continue;
		}
		
		bool git = 0;
		int koszt_lewo = 0;
		int nowe_lewo = l;
		int iter = l;
		while(iter > 0){
			if(iter == nowe_lewo) --nowe_lewo, ++koszt_lewo;
			--iter;
			if(iter != perm[iter]){
				nowe_lewo = min(nowe_lewo, lewo[odw[iter]]);
				if(prawo[odw[iter]] > p){git = 1; break;}
			}
		}
		if(!git){
			cokolwiek = 1;
			continue;
		}
		
		git = 0;
		int koszt_prawo = 0;
		int nowe_prawo = p;
		iter = p;
		while(iter < n-1){
			if(iter == nowe_prawo) ++nowe_prawo, ++koszt_prawo;
			++iter;
			if(iter != perm[iter]){
				nowe_prawo = max(nowe_prawo, prawo[odw[iter]]);
				if(lewo[odw[iter]] < l){git = 1; break;}
			}
		}
		if(!git){
			cokolwiek = 1;
			continue;
		}
		
		if(koszt_lewo < koszt_prawo) wyn += koszt_lewo<<1, l = nowe_lewo;
		else wyn += koszt_prawo<<1, p = nowe_prawo;
	}
	return wyn;
}

Subtask #1
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 348 KB 3rd lines differ - on the 1st token, expected: '6', found: '10'
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 348 KB 3rd lines differ - on the 1st token, expected: '6', found: '10'
2 Halted 0 ms 0 KB -

Subtask #3
0 / 28.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 348 KB 3rd lines differ - on the 1st token, expected: '6', found: '10'
2 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Incorrect 0 ms 348 KB 3rd lines differ - on the 1st token, expected: '2094', found: '2802'
5 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 348 KB 3rd lines differ - on the 1st token, expected: '6', found: '10'
2 Halted 0 ms 0 KB -