Submission #423995

#	Time	Username	Problem	Language	Result	Execution time	Memory
423995		AugustinasJucas	Ancient Books (IOI17_books)	C++14	12 / 100	2152 ms	849604 KiB

books

#include "books.h"
#include <bits/stdc++.h>
using namespace std;
long long minimum_walk(vector<int> p, int s) {
	vector<int> eil;
	int n = p.size();
	int pw = 1;
	for(int i = 0; i < 10; i++) pw *= 3;
	vector<int> mas(p.size());
	int ans = 1e9;
	map<pair<pair<int,int>, vector<int> > , int> dist;
	queue<pair<pair<int, int>, vector<int> > > q;
	q.push({{0, -1}, p});
	dist[{{0,-1}, p}] = 0;
	while(!q.empty()){
		int kur = q.front().first.first;
		int kas = q.front().first.second;
		vector<int> ms = q.front().second;
		//cout << "kur: " << kur << ", kas: " << kas << ", ms: "; for(auto x : ms) cout << x<< " "; cout << ", dist : " << dist[{{kur, kas}, ms}] << endl;
		q.pop();
		if(kur + 1 < p.size() && !dist.count({{kur+1, kas}, ms}) || dist[{{kur+1, kas}, ms}] > dist[{{kur, kas}, ms}] + 1){
			dist[{{kur+1, kas}, ms}] = 1 + dist[{{kur, kas}, ms}];
			q.push({{kur+1, kas}, ms});
		}
		
		if(kur - 1 >= 0 && !dist.count({{kur-1, kas}, ms}) || dist[{{kur-1, kas}, ms}] > dist[{{kur, kas}, ms}] + 1){
			dist[{{kur-1, kas}, ms}] = dist[{{kur, kas}, ms}] + 1;
			q.push({{kur-1, kas}, ms});
		}
		vector<int>vec = ms;
				int kss = kas;
		swap(vec[kur], kas);

		if(!dist.count({{kur, kas}, vec}) || dist[{{kur, kas}, vec}] > dist[{{kur, kss}, ms}] ){
			dist[{{kur, kas}, vec}] = dist[{{kur, kss}, ms}];
			q.push({{kur, kas}, vec});
		}
	}
	vector<int> goal; for(int i = 0; i < p.size(); i++) goal.push_back(i);
	return dist[{{0, -1}, {goal}}];
}// A A A A

Compilation message (stderr)

books.cpp: In function 'long long int minimum_walk(std::vector<int>, int)':
books.cpp:21:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |   if(kur + 1 < p.size() && !dist.count({{kur+1, kas}, ms}) || dist[{{kur+1, kas}, ms}] > dist[{{kur, kas}, ms}] + 1){
      |      ~~~~~~~~^~~~~~~~~~
books.cpp:21:25: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   21 |   if(kur + 1 < p.size() && !dist.count({{kur+1, kas}, ms}) || dist[{{kur+1, kas}, ms}] > dist[{{kur, kas}, ms}] + 1){
      |      ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
books.cpp:26:19: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   26 |   if(kur - 1 >= 0 && !dist.count({{kur-1, kas}, ms}) || dist[{{kur-1, kas}, ms}] > dist[{{kur, kas}, ms}] + 1){
      |      ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
books.cpp:39:37: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |  vector<int> goal; for(int i = 0; i < p.size(); i++) goal.push_back(i);
      |                                   ~~^~~~~~~~~~
books.cpp:6:6: warning: unused variable 'n' [-Wunused-variable]
    6 |  int n = p.size();
      |      ^
books.cpp:10:6: warning: unused variable 'ans' [-Wunused-variable]
   10 |  int ans = 1e9;
      |      ^~~

• Subtask 1: 12 / 12
• Subtask 2: 0 / 10
• Subtask 3: 0 / 28
• Subtask 4: 0 / 20
• Subtask 5: 0 / 30