Submission #889478

#	Time	Username	Problem	Language	Result	Execution time	Memory
889478		Lincito_31	Arranging Shoes (IOI19_shoes)	C++14	15 / 100	15 ms	2520 KiB

shoes

#include <bits/stdc++.h>
#include "shoes.h"
using namespace std;
long long x=0;
long long count_swaps(vector<int> s) {
    bool s3=true;
    bool s4=true;
    vector<int> xd_po;
    vector<int> xd_ne;
    int tam=s.size();
    tam/=2;
    for(int i=0;i<2*tam;i++){
        if(i<tam/2){
            if(s[i]!=-s[tam+i]){
                s4=false;
            }
        }
        if(i<2*tam-1){
            if(!(s[i]==s[i+1] || s[i]==-s[i+1])){
                s3=false;
            }
        }
        if(s[i]<0){
            if(i%2!=0){
                xd_ne.push_back(i);
            }
        }else{
            if(i%2==0){
                xd_po.push_back(i);
            }
        }
    }
    if(s4){
        x=tam;
        x*=tam-1;
        x/=2;
        return x;
    }else if(s3){
        for(int i=0;i<xd_po.size();i++){
            if(xd_po[i]>xd_ne[i]){
                x+=xd_po[i]-xd_ne[i];
            }else{
                x+=xd_ne[i]-xd_po[i];
            }
        }
        return x;
    }else{
        while(!s.empty()){
            int temp=s[0];
            if(temp<0){
                for(int i=1;i<s.size();i++){
                    if(s[i]==-temp){
                        x+=i-1;
                        s.erase(s.begin()+i);
                        break;
                    }
                }
                s.erase(s.begin());
            }else{
                for(int i=1;i<s.size();i++){
                    if(s[i]==-temp){
                        x+=i;
                        s.erase(s.begin()+i);
                        break;
                    }
                }
                s.erase(s.begin());
            }
        }
        return x;
    }
}

Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:39:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |         for(int i=0;i<xd_po.size();i++){
      |                     ~^~~~~~~~~~~~~
shoes.cpp:51:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   51 |                 for(int i=1;i<s.size();i++){
      |                             ~^~~~~~~~~
shoes.cpp:60:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   60 |                 for(int i=1;i<s.size();i++){
      |                             ~^~~~~~~~~

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