Submission #890571

#	Time	Username	Problem	Language	Result	Execution time	Memory
890571		svaz	Arranging Shoes (IOI19_shoes)	C++14	10 / 100	1081 ms	4392 KiB

shoes

#include "shoes.h"
#include<iostream>
#include<vector>
using namespace std;
long long count_swaps(std::vector<int> S){
    long long sw=0;
    vector<int> pos_der, pos_izq;
    for(int i=0;i<S.size()-1;i+=2){
      if(!(S[i]<0 && S[i+1]>0 && abs(S[i])==abs(S[i+1]))){
        if(S[i]>0)pos_der.push_back(i);
        else pos_izq.push_back(i);
        if(S[i+1]>0)pos_der.push_back(i+1);
        else pos_izq.push_back(i+1);
      }
    }
    for(int i=0;i<pos_izq.size();i++){
        sw+=abs(pos_der[i]-pos_izq[i]);
        if(pos_izq[i]<pos_der[i])sw--;
        for(int j=i+1;j<pos_izq.size();j++){
            if(pos_der[i]>pos_izq[j])++pos_izq[j];
            else break;
        }
        for(int j=i+1;j<pos_der.size();j++){
            if(pos_izq[i]>pos_der[j])++pos_der[j];
            else break;
        }
    }
    return sw;
}
/*int main(){
    int n,zap;
    cin>>n;
    vector<int>zapatos;
    for(int i=0;i<(n*2);i++){
        cin>>zap;
        zapatos.push_back(zap);
    }
    cout<<count_swaps(zapatos)<<"\n";
    return 0;
}*/

Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:8:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    8 |     for(int i=0;i<S.size()-1;i+=2){
      |                 ~^~~~~~~~~~~
shoes.cpp:16:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |     for(int i=0;i<pos_izq.size();i++){
      |                 ~^~~~~~~~~~~~~~~
shoes.cpp:19:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   19 |         for(int j=i+1;j<pos_izq.size();j++){
      |                       ~^~~~~~~~~~~~~~~
shoes.cpp:23:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |         for(int j=i+1;j<pos_der.size();j++){
      |                       ~^~~~~~~~~~~~~~~

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