oj.uz

Submission #724198

# Submission time Handle Problem Language Result Execution time Memory
724198 2023-04-14T20:44:49 Z sunnat Magic Tree (CEOI19_magictree) C++14
20 / 100
 410 ms 291828 KB 
#include <algorithm>
#include <iostream>
#include <vector>
#include <queue>
#include <cmath>
#include <map>
#include <set>
using namespace std;
#define int long long
 
struct node{
    int mx;
    int left;
    int right;
    int delta;
    node(){
        mx = delta = 0;
        left = right = -1;
    }
};
 
node free_node;
int k;
 
struct Dynamic_Segment_Tree{
    vector<node> t;
    
    Dynamic_Segment_Tree(){
        t.push_back(free_node);
    }
    
    int left_side(int v){
        if(t[v].left == -1){
            t[v].left = t.size();
            t.push_back(free_node);
            t.back().mx = t[v].mx;
        }
        return t[v].left;
    }
    
    int right_side(int v){
        if(t[v].right == -1){
            t[v].right = t.size();
            t.push_back(free_node);
            t.back().mx = t[v].mx;
        }
        return t[v].right;
    }

    void set(int v, int l, int r, int id, int w){
        if(r < id || t[v].mx >= w) return;
        int m = (l + r) >> 1;
        if(t[v].delta){
            if(t[v].left != -1){
                t[left_side(v)].mx = max(t[left_side(v)].mx, t[v].mx);
                t[right_side(v)].mx = max(t[right_side(v)].mx, t[v].mx);
                t[left_side(v)].delta += t[v].delta;
                t[right_side(v)].delta += t[v].delta;
                set(right_side(v), m+1, r, id, 0);
                set(left_side(v), l, m, id, 0);
            }
            t[v].mx += t[v].delta;
            t[v].delta = 0;
        }
        if(l >= id){
            t[v].mx = max(t[v].mx, w);
            return;
        }

        set(right_side(v), m+1, r, id, w);
        set(left_side(v), l, m, id, w);
    }
    void set(int id, int w){
        set(0, 1, k, id, w);
    }
    int get(int v, int l, int r, int id){
        if(v == -1 || r < id || l > id) return 0;
        if(l == r) return t[v].mx + t[v].delta;
        int m = (l + r) / 2;
        return max({t[v].mx, get(t[v].left, l, m, id), get(t[v].right, m+1, r, id)}) + t[v].delta;
    }
    int get(int x){
        return get(0, 1, k, x);
    }
    void merge(int v, int l, int r, Dynamic_Segment_Tree&d, int vd){
        if(vd == -1) return;
        if(d.t[vd].left == -1){
            t[v].delta += d.t[vd].mx + d.t[vd].delta;
            set(v, l, r, l, 0);
            return;
        }
        int m = (l + r) / 2;
        //d.t[d.t[vd].right].mx = max(d.t[d.t[vd].right].mx, d.t[vd].mx);
        //d.t[d.t[vd].left].mx = max(d.t[d.t[vd].left].mx, d.t[vd].mx);
        d.set(d.t[vd].right, m+1, r, m+1, d.t[vd].mx);
        d.set(d.t[vd].left, l, m, l, d.t[vd].mx);
        d.t[d.t[vd].right].delta += d.t[vd].delta;
        d.t[d.t[vd].left].delta += d.t[vd].delta;
        d.t[vd].delta = 0;
        set(v, l, m, l, 0);
        set(right_side(v), m+1, r, m+1, t[v].mx);
        merge(right_side(v), m+1, r, d, d.t[vd].right);
        
        set(left_side(v), l, m, l, t[v].mx);
        merge(left_side(v), l, m, d, d.t[vd].left);
    }
    void merge(Dynamic_Segment_Tree& d){
        merge(0, 1, k, d, 0);
    }
};
 
Dynamic_Segment_Tree free_seg_tree;
 
signed main(){
    cin.tie(nullptr)->sync_with_stdio(false);
    int n, m;
    cin >> n >> m >> k;
    vector<int> seg_id(n, -1);
    vector<Dynamic_Segment_Tree> seg_tree;
    vector<vector<int> > g(n);
    vector<pair<int, int> > q(n, make_pair(-1, -1));
    for(int i = 2, f; i <= n; i ++){
        cin >> f;
        g[f-1].push_back(i-1);
    }
    for(int i = 0, v, d, w; i < m; i ++){
        cin >> v >> d >> w;
        q[v-1] = make_pair(d, w);
    }
    for(int u = n-1; u >= 0; u --){
        if(g[u].empty()){
            if(q[u].first == -1) continue;
            seg_id[u] = seg_tree.size();
            seg_tree.push_back(free_seg_tree);
            seg_tree[seg_id[u]].set(q[u].first, q[u].second);
        }
        else{
            sort(g[u].begin(), g[u].end(), [&](int r, int l){
                if(seg_id[r] == -1) return false;
                if(seg_id[l] == -1) return true;
                return seg_tree[seg_id[r]].t.size() > seg_tree[seg_id[l]].t.size();
            });
            if(seg_id[g[u][0]] == -1){
                if(q[u].first != -1) {
                    seg_id[u] = seg_tree.size();
                    seg_tree.push_back(free_seg_tree);
                    seg_tree[seg_id[u]].set(q[u].first, q[u].second);
                }
            }
            else{
                seg_id[u] = seg_id[g[u][0]];
                for(int i = 1; i < g[u].size() && seg_id[g[u][i]] != -1; i ++)
                    seg_tree[seg_id[u]].merge(seg_tree[seg_id[g[u][i]]]);
                
                seg_tree[seg_id[u]].set(q[u].first, seg_tree[seg_id[u]].get(q[u].first) + q[u].second);
            }
        }
        // cout << u + 1 << ' ' << seg_tree[seg_id[u]].get(k) << endl;
    }
    cout << seg_tree[seg_id[0]].get(k);
    return 0;
}

Compilation message

magictree.cpp: In function 'int main()':
magictree.cpp:152:34: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  152 |                 for(int i = 1; i < g[u].size() && seg_id[g[u][i]] != -1; i ++)
      |                                ~~^~~~~~~~~~~~~

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 260 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct

Subtask #2
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 154 ms 105084 KB Output is correct
2 Correct 81 ms 48088 KB Output is correct
3 Correct 410 ms 291828 KB Output is correct
4 Correct 296 ms 169940 KB Output is correct
5 Correct 256 ms 170716 KB Output is correct

Subtask #3
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 468 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 60 ms 16448 KB Output is correct
5 Correct 66 ms 16476 KB Output is correct
6 Correct 79 ms 16440 KB Output is correct

Subtask #4
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 62 ms 12780 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 260 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Incorrect 110 ms 35556 KB Output isn't correct
11 Halted 0 ms 0 KB -

Subtask #6
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 4948 KB Output is correct
2 Incorrect 32 ms 9920 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #7
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 260 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 468 KB Output is correct
11 Correct 1 ms 468 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Correct 60 ms 16448 KB Output is correct
14 Correct 66 ms 16476 KB Output is correct
15 Correct 79 ms 16440 KB Output is correct
16 Incorrect 110 ms 35556 KB Output isn't correct
17 Halted 0 ms 0 KB -

Subtask #8
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 260 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 154 ms 105084 KB Output is correct
11 Correct 81 ms 48088 KB Output is correct
12 Correct 410 ms 291828 KB Output is correct
13 Correct 296 ms 169940 KB Output is correct
14 Correct 256 ms 170716 KB Output is correct
15 Correct 1 ms 468 KB Output is correct
16 Correct 1 ms 468 KB Output is correct
17 Correct 1 ms 468 KB Output is correct
18 Correct 60 ms 16448 KB Output is correct
19 Correct 66 ms 16476 KB Output is correct
20 Correct 79 ms 16440 KB Output is correct
21 Incorrect 62 ms 12780 KB Output isn't correct
22 Halted 0 ms 0 KB -