Submission #282821

#	Time	Username	Problem	Language	Result	Execution time	Memory
282821		Pichon5	Arranging Shoes (IOI19_shoes)	C++17	65 / 100	1055 ms	3072 KiB

shoes

#include "shoes.h"
#include <bits/stdc++.h>
#define lcm(a,b) (a/__gcd(a,b))*b
#define fast ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define ll long long int
#define vi vector<int>
#define vll vector<ll>
#define pb push_back
#define F first
#define S second
#define mp make_pair
using namespace std;
long long count_swaps(std::vector<int> s) {
    int n=s.size();
    ll res=0;
    int c;
    bool ok=true;
    for(int i=0;i<n/2;i++){
        if(s[i]>0 or s[i+n/2]<0 or s[i]+s[i+n/2]!=0){
            ok=false;
            break;
        }
    }
    if(ok==true){
        n=s.size()/2;
        for(int i=1;i<n;i++){
        res+=i;
    }
    return res;
    }
    for(int i=0;i<n;i++){
        for(int l=1;l<s.size();l++){
            if(s[l]+s[0]==0){
                if(s[l]<0){
                    res+=l;
                }else{
                    res+=l-1;
                }
                s.erase(s.begin()+l);
                s.erase(s.begin()+0);
            break;
            }
        }
    }
    //2 2 1 -1 -2
    return res;
}

Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:32:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |         for(int l=1;l<s.size();l++){
      |                     ~^~~~~~~~~
shoes.cpp:16:9: warning: unused variable 'c' [-Wunused-variable]
   16 |     int c;
      |         ^

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