Submission #1093283

#	Time	Username	Problem	Language	Result	Execution time	Memory
1093283		giaminh2211	Palembang Bridges (APIO15_bridge)	C++14	22 / 100	32 ms	1608 KiB

bridge

#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define fi first
#define se second

using namespace std;
using namespace __gnu_pbds;
using ll=long long;
using pii=pair<int, int>;

struct GetMedian{
    multiset<ll> fi;
    multiset<ll> se;
    ll fsum=0, ssum=0;

    void add(ll x){
        se.insert(x);
        ssum+=x;

        while(fi.size() && fi.size() > se.size()){
            ll val=*fi.rbegin();
            fsum-=val;
            fi.erase(fi.find(val));
            se.insert(val);
            ssum+=val;
        }

        while(se.size() && se.size() > fi.size()){
            ll val=*se.begin();
            ssum-=val;
            se.erase(se.begin());
            fi.insert(val);
            fsum+=val;
        }
    }

    ll get(){
        ll med=*fi.rbegin();
        ll val=(med * fi.size() - fsum) + (ssum - med * se.size());
        return val;
    }

    void clear(){
        fi.clear();
        se.clear();
        fsum=ssum=0;
    }
};

int k, n;
const int N=1e5+13;
int a[N];
ll res;
char c1, c2;
int x, y;

namespace sub1{
    vector<int> v;
    void solve(){
        for(int i=1; i<=n; i++){
            cin >> c1 >> x >> c2 >> y;
            if(c1==c2){
                res+=abs(x-y);
            }
            else{
                v.push_back(x);
                v.push_back(y);
                ++res;
            }
        }
        sort(begin(v), end(v));
        for(int c: v){
            res+=abs(c-v[v.size()/2]);
        }
        cout << res;
    }
}

vector<pair<int, int>> v;
ll l[N];
ll r[N];

void solve(){
    cin >> k >> n;
    if(k==1){
        sub1::solve();
        exit(0);
    }
    v.push_back({0, 0});
    for(int i=1; i<=n; i++){
        cin >> c1 >> x >> c2 >> y;
        if(c1==c2){
            res+=abs(x-y);
        }
        else{
            if(x > y) swap(x, y);
            v.push_back(make_pair(x, y));
            ++res;
        }
    }
    if(v.empty()){
        cout << res;
        return;
    }
    sort(begin(v)+1, end(v), [&](pii x, pii y){
        return x.fi + x.se < y.fi + y.se;
    });
    n=v.size()-1;
    GetMedian sus;
    for(int i=1; i<=n; i++){
        sus.add(v[i].fi);
        sus.add(v[i].se);
        l[i]=sus.get();
    }
    sus.clear();
    for(int i=n; i>=1; i--){
        sus.add(v[i].fi);
        sus.add(v[i].se);
        r[i]=sus.get();
    }
    ll ans=l[n];
    for(int i=1; i<n; i++){
        ans=min(ans, l[i]+r[i+1]);
    }
    cout << res+ans;
}

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    solve();
}

• Subtask 1: 8 / 8
• Subtask 2: 14 / 14
• Subtask 3: 0 / 9
• Subtask 4: 0 / 32
• Subtask 5: 0 / 37