Submission #500780

#	Time	Username	Problem	Language	Result	Execution time	Memory
500780		Khizri	Arranging Shoes (IOI19_shoes)	C++17	50 / 100	424 ms	6676 KiB

shoes

#include "shoes.h"
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pb push_back
#define F first
#define S second
#define INF 1e18
#define all(v) (v).begin(),(v).end()
#define rall(v) (v).rbegin(),(v).rend()
#define pii pair<int,int>
#define pll pair<ll,ll>
const int mxn=1e5+5;
int color[mxn];
bool f(pii a,pii b){
    return a.F+a.S<b.F+b.S;
}
int funk(vector<int>arr,vector<pii>vt){
    int a=0,b=1,ans=0;
    sort(all(vt),f);
    for(int i=0;i<arr.size();i++){
        ans+=abs(vt[arr[i]].F-a);
        for(int j=0;j<vt.size();j++){
            if(i==j) continue;
            if(vt[j].F>=a&&vt[j].F<=vt[arr[i]].F){
                vt[j].F++;
            }
        }
        for(int j=0;j<vt.size();j++){
            if(vt[j].S>=a&&vt[j].S<=vt[arr[i]].F){
                vt[j].S++;
            }
        }
        ans+=abs(vt[arr[i]].S-b);
        for(int j=0;j<vt.size();j++){
            if(vt[j].F>=b&&vt[j].F<=vt[arr[i]].S){
                vt[j].F++;
            }
        }
        for(int j=0;j<vt.size();j++){
            if(i==j) continue;
            if(vt[j].S>=b&&vt[j].S<=vt[arr[i]].S){
                vt[j].S++;
            }
        }
        a+=2,b+=2;
    }
    return ans;
}
long long count_swaps(vector<int> s) {
    int n=s.size();
	vector<pii>vt;
	for(int i=0;i<n;i++){
        if(color[i]) continue;
        for(int j=i+1;j<n;j++){
            if(!color[j]&&-s[i]==s[j]){
                if(s[i]<0){
                    vt.pb({i,j});
                }
                else{
                    vt.pb({j,i});
                }
                color[i]=1;
                color[j]=1;
                break;
            }
        }
	}
	vector<int>v;
	for(int i=0;i<n/2;i++){
        v.pb(i);
	}
	int ans=1e7;
    ans=min(ans,funk(v,vt));
    return ans;
}

Compilation message (stderr)

shoes.cpp: In function 'int funk(std::vector<int>, std::vector<std::pair<int, int> >)':
shoes.cpp:21:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |     for(int i=0;i<arr.size();i++){
      |                 ~^~~~~~~~~~~
shoes.cpp:23:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |         for(int j=0;j<vt.size();j++){
      |                     ~^~~~~~~~~~
shoes.cpp:29:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   29 |         for(int j=0;j<vt.size();j++){
      |                     ~^~~~~~~~~~
shoes.cpp:35:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 |         for(int j=0;j<vt.size();j++){
      |                     ~^~~~~~~~~~
shoes.cpp:40:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |         for(int j=0;j<vt.size();j++){
      |                     ~^~~~~~~~~~

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