Submission #864587

#	Time	Username	Problem	Language	Result	Execution time	Memory
864587		danikoynov	New Home (APIO18_new_home)	C++14	12 / 100	5075 ms	50084 KiB

new_home

#include<bits/stdc++.h>

using namespace std;
typedef long long ll;

const int maxn = 3e5 + 10, inf = 1e9;

struct store
{
    int x, t, a, b;
}s[maxn];

struct query
{
    int l, y, idx;
}task[maxn];

int n, k, q;

void input()
{
    cin >> n >> k >> q;
    for (int i = 1; i <= n; i ++)
        cin >> s[i].x >> s[i].t >> s[i].a >> s[i].b;

    for (int i = 1; i <= q; i ++)
        cin >> task[i].l >> task[i].y, task[i].idx = i;
}

int type[maxn];
int solve_naive(int pivot, int year)
{
    for (int i = 1; i <= k; i ++)
        type[i] = inf;

    for (int i = 1; i <= n; i ++)
    {
        if (s[i].a <= year && s[i].b >= year)
            type[s[i].t] = min(type[s[i].t], abs(pivot - s[i].x));
    }

    int ans = -1;
    for (int i = 1; i <= k; i ++)
    {
        if (type[i] == inf)
            return -1;
        ans = max(ans, type[i]);
    }

    return ans;
}

bool cmp_query(query t1, query t2)
{
    return t1.y < t2.y;
}

struct event
{
    int type, cor, add, arrive;

    event(int _type, int _cor, int _add, int _arrive)
    {
        type = _type;
        cor = _cor;
        add = _add;
        arrive = _arrive;
    }
};

bool cmp_event(event e1, event e2)
{
    if (e1.arrive != e2.arrive)
        return e1.arrive < e2.arrive;

    if (e1.add != e2.add)
        return e1.add < e2.add;

    return e1.cor < e2.cor; /// could have dublicates
}


multiset < int > act[maxn];


void add_event(int type, int cor)
{
    act[type].insert(cor);
}

void remove_event(int type, int cor)
{
    act[type].erase(act[type].find(cor));
}

int ans[maxn];

int single_query(int cor)
{
    int far = 0;
    for (int i = 1; i <= k; i ++)
    {
        if (act[i].empty())
            return -1;

        multiset < int > :: iterator it = act[i].upper_bound(cor);
        int closest = inf;
        ///if (it != act[i].end())
        ///cout << "here " << cor << " " << *it << endl;
        if (it != act[i].end())
            closest = min(closest, *it - cor);
        
        if (it != act[i].begin())
            closest = min(closest, cor - *prev(it));
        
        far = max(far, closest);
        ///cout << far << endl;
    }

    return far;
}
void answer_queries()
{
    sort(task + 1, task + q + 1, cmp_query);
    
    vector < event > events;
    for (int i = 1; i <= n; i ++)
    {
        events.push_back(event(s[i].t, s[i].x, 1, s[i].a));
        events.push_back(event(s[i].t, s[i].x, -1, s[i].b + 1));
    }

    sort(events.begin(), events.end(), cmp_event);

    int pt = 1;
    for (event cur : events)
    {
        while(pt <= q && task[pt].y < cur.arrive)
        {
            ans[task[pt].idx] = single_query(task[pt].l);
            pt ++;
        }

        if (cur.add == 1)
            add_event(cur.type, cur.cor);
        else
            remove_event(cur.type, cur.cor);
    }

    while(pt <= q)
    {
         ans[task[pt].idx] = single_query(task[pt].l);
         pt ++;
    }

    for (int i = 1; i <= q; i ++)
        cout << ans[i] << endl;
}
void solve()
{
    input();
    answer_queries();
}

int main()
{
    solve();
    return 0;
}

/**
4 2 4
3 1 1 10
9 2 2 4
7 2 5 7
4 1 8 10
5 3
5 6
5 9
1 10

2 1 3
1 1 1 4
1 1 2 6
1 3
1 5
1 7

1 1 1
100000000 1 1 1
1 1



*/

• Subtask 1: 5 / 5
• Subtask 2: 7 / 7
• Subtask 3: 0 / 10
• Subtask 4: 0 / 23
• Subtask 5: 0 / 35
• Subtask 6: 0 / 20