oj.uz

Submission #864812

# Submission time Handle Problem Language Result Execution time Memory
864812 2023-10-23T16:26:56 Z danikoynov New Home (APIO18_new_home) C++14
5 / 100
 5000 ms 948084 KB 
#include<bits/stdc++.h>
#define endl '\n'
 
using namespace std;
typedef long long ll;
 
const int maxn = 6e5 + 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;
}
 
unordered_map < int, int > rev;
int dif, back_to[2 * maxn];
 
int get_mid(int left, int right)
{
    if (left == right)
        return rev[left];
    
    int lf = rev[left], rf = rev[right];
    while(lf <= rf)
    {
        int mf = (lf + rf) / 2;
        if (abs(left - back_to[mf]) <= abs(right - back_to[mf]))
            lf = mf + 1;
        else
            rf = mf - 1;
    }
 
    return rf;
}
void compress_data()
{
    vector < int > cor;
    for (int i = 1; i <= n; i ++)
        cor.push_back(s[i].x);
    for (int i = 1; i <= q; i ++)
        cor.push_back(task[i].l);
 
    sort(cor.begin(), cor.end());
    int sz = cor.size();
 
    for (int i = 0; i < cor.size(); i ++)
    {
        if (i != 0 || cor[i - 1] != cor[i])
        {
            dif ++;
            rev[cor[i]] = dif;
            back_to[dif] = cor[i];
        }
    }
}

 
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];

struct interval_ray
{
    int s, e;
    pair < int, int > ray;

    interval_ray(int _s, int _e, pair < int, int > _ray)
    {
        s = _s;
        e = _e;
        ray = _ray;
    }
};

vector < interval_ray > seg_left, seg_right;

map < pair < int, int >, int > ray_right[maxn], ray_left[maxn];

void make_left_segment(int start, int finish, int timer, int type)
{
    
    ///cout << "left " << start << " " << finish << " " << timer << endl;
    seg_left.push_back(interval_ray(ray_left[type][{start, finish}], timer - 1, {start, finish}));
    ray_left[type][{start, finish}] = 0;
}

void make_right_segment(int start, int finish, int timer, int type)
{

    seg_right.push_back(interval_ray(ray_right[type][{start, finish}], timer - 1, {start, finish}));
    ray_right[type][{start, finish}] = 0;
}

void add_event(int type, int cor, int timer)
{
    multiset < int > :: iterator it = act[type].upper_bound(cor);
    int aft = *it;
    int bef = *prev(it);
    
    if (bef == -inf && aft == inf)
    {
       
        make_right_segment(-inf, inf, timer, type);
        ray_left[type][{cor, -inf}] = timer;
        ray_right[type][{cor, +inf}] = timer;
    }
    else
    if (bef == - inf)
    {
        make_left_segment(aft, -inf, timer, type);
        int mid = (cor + aft) / 2;
        ray_right[type][{cor, mid}] = timer;
        ray_left[type][{aft, mid + 1}] = timer;
        ray_left[type][{cor, -inf}] = timer;
    }
    else
    if (aft == inf)
    {
        make_right_segment(bef, inf, timer, type);
        int mid = (bef + cor) / 2;
        ray_left[type][{cor, mid + 1}] = timer;
        ray_right[type][{bef, mid}] = timer;
        ray_right[type][{cor, inf}] = timer;
    }
    else
    {
        int mid = (bef + aft) / 2;
        make_right_segment(bef, mid, timer, type);
        make_left_segment(aft, mid + 1, timer, type);
        int mid_left = (bef + cor) / 2;
        ray_right[type][{bef, mid_left}] = timer;
        ray_left[type][{cor, mid_left + 1}] = timer;
        int mid_right = (cor + aft) / 2;
        ray_right[type][{cor, mid_right}] = timer;
        ray_left[type][{aft, mid_right + 1}] = timer;
    }

    act[type].insert(cor);
}


void remove_event(int type, int cor, int timer)
{
    multiset < int > :: iterator it = act[type].find(cor);
    int aft = *next(it);
    int bef = *prev(it);
    
    if (bef == -inf && aft == inf)
    {
        ///cout << "reverse " << timer << endl;

        make_left_segment(cor, -inf, timer, type);
        make_right_segment(cor, +inf, timer, type);
        ray_right[type][{-inf, inf}] = timer;

    }
    else
    if (bef == -inf)
    {

        ///cout << "step " << timer << endl;
        make_left_segment(cor, -inf, timer, type);
        int mid = (cor + aft) / 2;
        make_right_segment(cor, mid, timer, type);
        make_left_segment(aft, mid + 1, timer, type);
                ray_left[type][{aft, -inf}] = timer;


    }
    else
    if (aft == inf)
    {

        make_right_segment(cor, inf, timer, type);
        int mid = (bef + cor) / 2;
        make_left_segment(cor, mid + 1, timer, type);
        make_right_segment(bef, mid, timer, type);
                ray_right[type][{bef, inf}] = timer;
    }
    else
    {
        int mid = (bef + aft) / 2;
        ///assert((ray_right[type][{bef, mid}]) == 0);
        ///assert((ray_left[type][{aft, mid + 1}]) == 0);

        int mid_left = (bef + cor) / 2;
        make_right_segment(bef, mid_left, timer, type);
        make_left_segment(cor, mid_left + 1, timer, type);
        int mid_right = (aft + cor) / 2;
        make_right_segment(cor, mid_right, timer, type);
        make_left_segment(aft, mid_right + 1, timer, type);

                ray_right[type][{bef, mid}] = timer;
        ray_left[type][{aft, mid + 1}] = timer;

    }

    act[type].erase(it);
}
 
int ans[maxn];
 
vector < interval_ray > tree_left[maxn * 4], tree_right[maxn * 4];
void update_range(int root, int left, int right, int qleft, int qright, interval_ray ray, int type)
{
    if (left > qright || right < qleft)
        return;

    if (left >= qleft && right <= qright)
    {
        if (type == -1)
            tree_left[root].push_back(ray);
        else
            tree_right[root].push_back(ray);
        return;
    }

    int mid = (left + right) / 2;
    update_range(root * 2, left, mid, qleft, qright, ray, type);
    update_range(root * 2 + 1, mid + 1, right, qleft, qright, ray, type);

}

unordered_map < int, int > event_times;
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);
 
    for (int i = 1; i <= k; i ++)
    {
        act[i].insert(-inf);
        act[i].insert(inf);
        ray_right[i][{-inf, inf}] = 1;
    }
 
    
    int cnt = 0;
    vector < int > data;
    data.push_back(0);
    data.push_back(1);

    for (event cur : events)
    {
        data.push_back(cur.arrive - 1);
        data.push_back(cur.arrive);

        ///cout << "event " << cur.arrive << " " << cur.add << " " << cur.cor << " " << cur.type << endl;
        if (cur.add == 1)
            add_event(cur.type, cur.cor, cur.arrive);
        else
            remove_event(cur.type, cur.cor, cur.arrive);
    }

    data.push_back(inf - 1);
    data.push_back(inf);

    for (int i = 1; i <= q; i ++)
        data.push_back(task[i].y);

    sort(data.begin(), data.end());
    cnt ++;
    event_times[data[0]] = cnt;
    for (int i = 1; i < data.size(); i ++)
    {
        if (data[i] == data[i - 1])
            continue;
        cnt ++;
        event_times[data[i]] = cnt;
    }

    map < pair < int, int >, int > :: iterator it;
    for (int i = 1; i <= k; i ++)
        for (it = ray_right[i].begin(); it != ray_right[i].end(); it ++)
        {
            ///cout << it -> first.first << " :: " << it -> first.second << " " << it -> second << endl;
            if (it -> second != 0)
                make_right_segment(it -> first.first, it -> first.second, inf, i);
        }


    for (int i = 1; i <= k; i ++)
        for (it = ray_left[i].begin(); it != ray_left[i].end(); it ++)
        {
            if (it -> second != 0)
            {
            ///cout << "here " << endl;
                make_left_segment(it -> first.first, it -> first.second, inf, i);
            }
        }

    
    for (interval_ray cur : seg_left)
    {
        update_range(1, 1, cnt, event_times[cur.s], event_times[cur.e], cur, -1);
    ///    cout << "left ray " << cur.s << " " << cur.e << " " << cur.ray.first << " " << cur.ray.second << endl;
    }

    for (interval_ray cur : seg_right)
    {
        update_range(1, 1, cnt, event_times[cur.s], event_times[cur.e], cur, 1);
        ///cout << "right ray " << cur.s << " " << cur.e << " " << cur.ray.first << " " << cur.ray.second << endl;
    }

    
    for (int i = 1; i <= q; i ++)
    {
        int longest = 0;
        int pos = event_times[task[i].y];
        int root = 1, left = 1, right = cnt;
        while(true)
        {
            ///cout << "step " << root << " " << left << " " << right << endl;
            for (interval_ray cur : tree_left[root])
            {
                if (task[i].l >= cur.ray.second)
                    longest = max(longest, cur.ray.first - task[i].l);
            }

            for (interval_ray cur : tree_right[root])
            {
                if (task[i].l <= cur.ray.second)
                    longest = max(longest, task[i].l - cur.ray.first);
            }

            if (left == right)
                break;

            int mid = (left + right) / 2;
            if (pos <= mid)
            {
                root *= 2;
                right = mid;
            }
            else
            {
                root = root * 2 + 1;
                left = mid + 1;
            }
        }

        if (longest > 2e8)
            ans[task[i].idx] = -1;
        else
            ans[task[i].idx] = longest;
    }
 
    for (int i = 1; i <= q; i ++)
        cout << ans[i] << endl;
}
void solve()
{
    input();
    compress_data();
    answer_queries();
}
 
void speed()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
}
int main()
{
    ///speed();
    solve();
    return 0;
}
 
/**
2 1 2
3 1 1 3
5 1 3 4
3 3
3 4
 
 
 
 
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
 
 
 
*/

Compilation message

new_home.cpp: In function 'void compress_data()':
new_home.cpp:62:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   62 |     for (int i = 0; i < cor.size(); i ++)
      |                     ~~^~~~~~~~~~~~
new_home.cpp:60:9: warning: unused variable 'sz' [-Wunused-variable]
   60 |     int sz = cor.size();
      |         ^~
new_home.cpp: In function 'void answer_queries()':
new_home.cpp:317:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  317 |     for (int i = 1; i < data.size(); i ++)
      |                     ~~^~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 41 ms 203588 KB Output is correct
2 Correct 40 ms 203612 KB Output is correct
3 Correct 43 ms 203608 KB Output is correct
4 Correct 39 ms 203608 KB Output is correct
5 Correct 41 ms 203888 KB Output is correct
6 Correct 43 ms 204368 KB Output is correct
7 Correct 42 ms 204372 KB Output is correct
8 Correct 47 ms 204624 KB Output is correct
9 Correct 42 ms 204380 KB Output is correct
10 Correct 44 ms 204408 KB Output is correct
11 Correct 42 ms 204116 KB Output is correct
12 Correct 47 ms 204224 KB Output is correct
13 Correct 43 ms 203992 KB Output is correct
14 Correct 45 ms 204160 KB Output is correct
15 Correct 43 ms 204124 KB Output is correct
16 Correct 43 ms 204112 KB Output is correct
17 Correct 42 ms 204124 KB Output is correct
18 Correct 42 ms 204116 KB Output is correct
19 Correct 43 ms 204124 KB Output is correct
20 Correct 45 ms 204116 KB Output is correct
21 Correct 41 ms 203856 KB Output is correct
22 Correct 42 ms 204368 KB Output is correct
23 Correct 42 ms 204380 KB Output is correct
24 Correct 42 ms 204372 KB Output is correct
25 Correct 42 ms 204116 KB Output is correct
26 Correct 42 ms 204124 KB Output is correct
27 Correct 44 ms 204116 KB Output is correct
28 Correct 42 ms 204124 KB Output is correct
29 Correct 42 ms 204116 KB Output is correct
30 Correct 41 ms 203856 KB Output is correct

Subtask #2
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 41 ms 203588 KB Output is correct
2 Correct 40 ms 203612 KB Output is correct
3 Correct 43 ms 203608 KB Output is correct
4 Correct 39 ms 203608 KB Output is correct
5 Correct 41 ms 203888 KB Output is correct
6 Correct 43 ms 204368 KB Output is correct
7 Correct 42 ms 204372 KB Output is correct
8 Correct 47 ms 204624 KB Output is correct
9 Correct 42 ms 204380 KB Output is correct
10 Correct 44 ms 204408 KB Output is correct
11 Correct 42 ms 204116 KB Output is correct
12 Correct 47 ms 204224 KB Output is correct
13 Correct 43 ms 203992 KB Output is correct
14 Correct 45 ms 204160 KB Output is correct
15 Correct 43 ms 204124 KB Output is correct
16 Correct 43 ms 204112 KB Output is correct
17 Correct 42 ms 204124 KB Output is correct
18 Correct 42 ms 204116 KB Output is correct
19 Correct 43 ms 204124 KB Output is correct
20 Correct 45 ms 204116 KB Output is correct
21 Correct 41 ms 203856 KB Output is correct
22 Correct 42 ms 204368 KB Output is correct
23 Correct 42 ms 204380 KB Output is correct
24 Correct 42 ms 204372 KB Output is correct
25 Correct 42 ms 204116 KB Output is correct
26 Correct 42 ms 204124 KB Output is correct
27 Correct 44 ms 204116 KB Output is correct
28 Correct 42 ms 204124 KB Output is correct
29 Correct 42 ms 204116 KB Output is correct
30 Correct 41 ms 203856 KB Output is correct
31 Execution timed out 5056 ms 355316 KB Time limit exceeded
32 Halted 0 ms 0 KB -

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 5039 ms 831116 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 23.0

# Verdict Execution time Memory Grader output
1 Execution timed out 5042 ms 948084 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 41 ms 203588 KB Output is correct
2 Correct 40 ms 203612 KB Output is correct
3 Correct 43 ms 203608 KB Output is correct
4 Correct 39 ms 203608 KB Output is correct
5 Correct 41 ms 203888 KB Output is correct
6 Correct 43 ms 204368 KB Output is correct
7 Correct 42 ms 204372 KB Output is correct
8 Correct 47 ms 204624 KB Output is correct
9 Correct 42 ms 204380 KB Output is correct
10 Correct 44 ms 204408 KB Output is correct
11 Correct 42 ms 204116 KB Output is correct
12 Correct 47 ms 204224 KB Output is correct
13 Correct 43 ms 203992 KB Output is correct
14 Correct 45 ms 204160 KB Output is correct
15 Correct 43 ms 204124 KB Output is correct
16 Correct 43 ms 204112 KB Output is correct
17 Correct 42 ms 204124 KB Output is correct
18 Correct 42 ms 204116 KB Output is correct
19 Correct 43 ms 204124 KB Output is correct
20 Correct 45 ms 204116 KB Output is correct
21 Correct 41 ms 203856 KB Output is correct
22 Correct 42 ms 204368 KB Output is correct
23 Correct 42 ms 204380 KB Output is correct
24 Correct 42 ms 204372 KB Output is correct
25 Correct 42 ms 204116 KB Output is correct
26 Correct 42 ms 204124 KB Output is correct
27 Correct 44 ms 204116 KB Output is correct
28 Correct 42 ms 204124 KB Output is correct
29 Correct 42 ms 204116 KB Output is correct
30 Correct 41 ms 203856 KB Output is correct
31 Execution timed out 5056 ms 355316 KB Time limit exceeded
32 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 41 ms 203588 KB Output is correct
2 Correct 40 ms 203612 KB Output is correct
3 Correct 43 ms 203608 KB Output is correct
4 Correct 39 ms 203608 KB Output is correct
5 Correct 41 ms 203888 KB Output is correct
6 Correct 43 ms 204368 KB Output is correct
7 Correct 42 ms 204372 KB Output is correct
8 Correct 47 ms 204624 KB Output is correct
9 Correct 42 ms 204380 KB Output is correct
10 Correct 44 ms 204408 KB Output is correct
11 Correct 42 ms 204116 KB Output is correct
12 Correct 47 ms 204224 KB Output is correct
13 Correct 43 ms 203992 KB Output is correct
14 Correct 45 ms 204160 KB Output is correct
15 Correct 43 ms 204124 KB Output is correct
16 Correct 43 ms 204112 KB Output is correct
17 Correct 42 ms 204124 KB Output is correct
18 Correct 42 ms 204116 KB Output is correct
19 Correct 43 ms 204124 KB Output is correct
20 Correct 45 ms 204116 KB Output is correct
21 Correct 41 ms 203856 KB Output is correct
22 Correct 42 ms 204368 KB Output is correct
23 Correct 42 ms 204380 KB Output is correct
24 Correct 42 ms 204372 KB Output is correct
25 Correct 42 ms 204116 KB Output is correct
26 Correct 42 ms 204124 KB Output is correct
27 Correct 44 ms 204116 KB Output is correct
28 Correct 42 ms 204124 KB Output is correct
29 Correct 42 ms 204116 KB Output is correct
30 Correct 41 ms 203856 KB Output is correct
31 Execution timed out 5056 ms 355316 KB Time limit exceeded
32 Halted 0 ms 0 KB -