Submission #645367

#	Time	Username	Problem	Language	Result	Execution time	Memory
645367		rc_catunta	Arranging Shoes (IOI19_shoes)	C++17	30 / 100	18 ms	1868 KiB

shoes

#include "shoes.h"
#include <bits/stdc++.h>

using namespace std;

long long count_swaps(vector<int> s) {
	if(s.size()/2 <= 8){
		int n = s.size()/2;
		// Etiquetar los zapatos
		map<int, int> m;
		int id = 1;
		for(auto zapato: s){
			if(zapato<0){
				m[id]=-zapato;
				id++;
			}
		}
		// Creamos el vector de posibilidades
		vector<int> v;
		for(int i=1;i<=n;i++) v.push_back(i);
		int res = 100000000;
		// Generador de posibilidades
		do{
			int pasos = 0;
			vector<int> cs = s;
			for(int i=0;i<v.size();i++){
				int tam = m[v[i]];
				// Colocar el izquierdo
				// Buscamos el izquierdo
				for(int j=i*2;j<cs.size();j++){
					if(cs[j]==-tam){
						for(int k=j-1;k>=i*2;k--){
							swap(cs[k],cs[k+1]);
							pasos++;
						}
						break;
					}
				}
				// Buscamos el izquierdo
				for(int j=i*2+1;j<cs.size();j++){
					if(cs[j]==tam){
						for(int k=j-1;k>=i*2+1;k--){
							swap(cs[k],cs[k+1]);
							pasos++;
						}
						break;
					}
				}
			}
			res = min(res,pasos);

		}while(next_permutation(v.begin(),v.end()));
		return res;
	}

	else return 0;
}

Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:26:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |    for(int i=0;i<v.size();i++){
      |                ~^~~~~~~~~
shoes.cpp:30:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   30 |     for(int j=i*2;j<cs.size();j++){
      |                   ~^~~~~~~~~~
shoes.cpp:40:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |     for(int j=i*2+1;j<cs.size();j++){
      |                     ~^~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 15
• Subtask 5: 0 / 20
• Subtask 6: 0 / 15