Submission #979750

#	Time	Username	Problem	Language	Result	Execution time	Memory
979750		Jarif_Rahman	New Home (APIO18_new_home)	C++17	57 / 100	5044 ms	325204 KiB

new_home

#include <bits/stdc++.h>
#define pb push_back
#define f first
#define sc second
using namespace std;
typedef long long int ll;
typedef string str;

const int lim = 7e6;

struct Node{
    int inc = -1e9, dec = -1e9;
    Node *l = nullptr, *r = nullptr;

    Node(){}
    Node(Node *_l, Node *_r): l(_l), r(_r){}
    void update(){
        inc = -1e9;
        if(l) inc = max(inc, l->inc);
        if(r) inc = max(inc, r->inc);

        dec = -1e9;
        if(l) dec = max(dec, l->dec);
        if(r) dec = max(dec, r->dec);
    }
};

/*int ls_node = 0;
Node* newNode(){
    return &Nodes[ls_node++];
}*/

struct sparse_segtree{
    Node* root = new Node();
    int n = 1;
    sparse_segtree(int _n){
        while(n < _n) n*=2;
    }
    void update(int i, Node *nd, int a, int b, int x, bool inc){
        if(a == b){
            if(inc) nd->inc = x+n-1-i;
            else nd->dec = x+i;
            return;
        }
        int m = (a+b)/2;
        if(i <= m){
            if(nd->l == nullptr) nd->l = new Node();
            update(i, nd->l, a, m, x, inc);
        }
        else{
             if(nd->r == nullptr) nd->r = new Node();
             update(i, nd->r, m+1, b, x, inc);
        }
        nd->update();
    }
    void update(int i, int x, bool inc){
        update(i, root, 0, n-1, x, inc);
    }

    int get(int l, int r, Node* nd, int a, int b, bool inc){
        if(!nd) return -1e9;
        if(a > r || b < l) return -1e9;
        if(a >= l && b <= r){
            if(inc) return nd->inc;
            else return nd->dec;
        }
        int m = (a+b)/2;
        return max(get(l, r, nd->l, a, m, inc), get(l, r, nd->r, m+1, b, inc));
    }
    int get(int l, int r, bool inc){
        return get(l, r, root, 0, n-1, inc);
    }
};

const int L = 1e8+5;

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    int n, k, q; cin >> n >> k >> q;
    vector<tuple<int, int, int, int>> queries;

    for(int i = 0; i < n; i++){
        int x, t, a, b; cin >> x >> t >> a >> b; t--;
        queries.push_back({a, 0, x, t});
        queries.push_back({b, 2, x, t});
    }
    for(int i = 0; i < q; i++){
        int l, y; cin >> l >> y;
        queries.push_back({y, 1, l, i});
    }
    sort(queries.begin(), queries.end());

    vector<set<int>> stores(k);
    vector<map<int, int>> cnt(k);
    map<int, multiset<int>> mx[2];
    sparse_segtree S(L);

    auto add_to_mx = [&](int i, int x, bool inc){
        if(mx[inc][i].empty() || x > *mx[inc][i].rbegin()) S.update(i, x, inc);
        mx[inc][i].insert(x);
    };
    auto remove_from_mx = [&](int i, int x, bool inc){
        mx[inc][i].erase(mx[inc][i].find(x));
        if(mx[inc][i].empty()) S.update(i, -1e9, inc);
        else if(x > *mx[inc][i].rbegin()) S.update(i, *mx[inc][i].rbegin(), inc);
    };

    auto add = [&](int t, int x){
        cnt[t][x]++;
        if(cnt[t][x] > 1) return;
        auto it = stores[t].insert(x).first;
        if(stores[t].size() == 1){
            add_to_mx(0, x, false);
            add_to_mx(L-1, L-1-x, true);
        }
        else if(it == stores[t].begin()){
            remove_from_mx(0, *next(it), false);
            add_to_mx(0, x, false);
            int md = (x+*next(it))/2;
            if(md > x) add_to_mx(md, md-x, true);
            add_to_mx(md+1, *next(it)-md-1, false);
        }
        else if(next(it) == stores[t].end()){
            remove_from_mx(L-1, L-1-*prev(it), true);
            int md = (*prev(it)+x)/2;
            if(md > *prev(it)) add_to_mx(md, md-*prev(it), true);
            add_to_mx(md+1, x-md-1, false);
            add_to_mx(L-1, L-1-x, true);
        }
        else{
            int md = (*prev(it)+*next(it))/2;
            if(md > *prev(it)) remove_from_mx(md, md-*prev(it), true);
            remove_from_mx(md+1, *next(it)-md-1, false);

            md = (*prev(it)+x)/2;
            if(md > *prev(it)) add_to_mx(md, md-*prev(it), true);
            add_to_mx(md+1, x-md-1, false);

            md = (x+*next(it))/2;
            if(md > x) add_to_mx(md, md-x, true);
            add_to_mx(md+1, *next(it)-md-1, false);
        }
    };
    auto remove = [&](int t, int x){
        cnt[t][x]--;
        if(cnt[t][x] > 0) return;
        auto it = stores[t].find(x);
        if(stores[t].size() == 1){
            remove_from_mx(0, x, false);
            remove_from_mx(L-1, L-1-x, true);
        }
        else if(it == stores[t].begin()){
            add_to_mx(0, *next(it), false);
            remove_from_mx(0, x, false);
            int md = (x+*next(it))/2;
            if(md > x) remove_from_mx(md, md-x, true);
            remove_from_mx(md+1, *next(it)-md-1, false);
        }
        else if(next(it) == stores[t].end()){
            add_to_mx(L-1, L-1-*prev(it), true);
            int md = (*prev(it)+x)/2;
            if(md > *prev(it)) remove_from_mx(md, md-*prev(it), true);
            remove_from_mx(md+1, x-md-1, false);
            remove_from_mx(L-1, L-1-x, true);
        }
        else{
            int md = (*prev(it)+*next(it))/2;
            if(md > *prev(it)) add_to_mx(md, md-*prev(it), true);
            add_to_mx(md+1, *next(it)-md-1, false);

            md = (*prev(it)+x)/2;
            if(md > *prev(it)) remove_from_mx(md, md-*prev(it), true);
            remove_from_mx(md+1, x-md-1, false);

            md = (x+*next(it))/2;
            if(md > x) remove_from_mx(md, md-x, true);
            remove_from_mx(md+1, *next(it)-md-1, false);
        }
        stores[t].erase(it);
    };

    vector<int> cnt_t(k, 0);
    int nonzero = 0;

    vector<int> ans(q);

    for(auto [_, type, x, i]: queries){
        if(type == 0){
            cnt_t[i]++;
            if(cnt_t[i] == 1) nonzero++;
            add(i, x);
        }
        else if(type == 2){
            cnt_t[i]--;
            if(cnt_t[i] == 0) nonzero--;
            remove(i, x);
        }
        else{
            if(nonzero < k) ans[i] = -1;
            else ans[i] = max(S.get(0, x, 0)-x, S.get(x, S.n-1, 1)-(S.n-1)+x);
        }
    }

    for(int x: ans) cout << x << "\n";
}

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