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답안 #278074

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
278074 2020-08-21T09:47:02 Z egekabas Magic Tree (CEOI19_magictree) C++14
100 / 100
 616 ms 34036 KB 
#include <bits/stdc++.h>
#define all(x) (x).begin(), (x).end()
#define ff first
#define ss second
#define pb push_back
#define mp make_pair
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef pair<ll, ll> pll;
typedef pair<ull, ull> pull;
typedef pair<ll, ll> pii;
typedef pair<ld, ld> pld;
vector<pii> v1;
vector<pii> v2;
struct vertex{
    ll left, right;
    ll maxi = 0, lazy = 0, sz = 0;
    vertex *lchild = nullptr, *rchild = nullptr;
    vertex(){}
    vertex(ll lb, ll rb){
        left = lb;
        right = rb;
    }
    void push(){
        if(lchild){
            lchild->lazy += lazy;
            lchild->maxi += lazy;
        }
        if(rchild){
            rchild->lazy += lazy;
            rchild->maxi += lazy;
        }
        lazy = 0;
    }
    void pull(){
        maxi = 0;
        if(lchild)
            maxi = max(maxi, lchild->maxi);
        if(rchild)
            maxi = max(maxi, rchild->maxi);
    }
    void add(ll idx, ll val){
        ++sz;
        if(left == idx && right == idx){
            maxi = max(maxi, val);
            return;
        }
        push();
        if(idx <= (left+right)/2){
            if(!lchild)
                lchild = new vertex(left, (left+right)/2);
            lchild->add(idx, val);
        }
        else{
            if(!rchild)
                rchild = new vertex((left+right)/2+1, right);
            rchild->add(idx, val);    
        }
        pull();
    }
    void upd(ll l, ll r, ll val){
        if(right < l || r < left)
            return;
        if(l <= left && right <= r){
            maxi += val;
            lazy += val;
            return;
        }
        push();
        if(lchild)
            lchild->upd(l, r, val);
        if(rchild)
            rchild->upd(l, r, val);
        pull();
    }
    ll get(ll l, ll r){
        if(right < l || r < left)
            return 0;
        if(l <= left && right <= r){
            return maxi;
        }
        push();
        ll ret = 0;
        if(lchild)
            ret = max(ret, lchild->get(l, r));
        if(rchild)
            ret = max(ret, rchild->get(l, r));
        return ret;
    }
    void dfs(){
        if(left == right){
            v1.pb({left, maxi});
            if(v2.empty() || maxi > v2.back().ss)
                v2.pb({left, maxi});
            return;
        }
        push();
        if(lchild)
            lchild->dfs();
        if(rchild)
            rchild->dfs();
        delete lchild;
        delete rchild;
    }
};
vector<ll> g[100009];
ll n, m, k;
pii val[100009];
void merge(vertex &a, vertex &b){
    if(b.sz > a.sz)
        swap(a, b);
    v1.clear();
    v2.clear();
    b.dfs();
    for(auto &u : v1){
        u.ss += a.get(1, u.ff);
    }
    for(ll i = 0; i < v2.size(); ++i){
        ll val;
        if(i == 0)
            val = v2[i].ss;
        else
            val = v2[i].ss-v2[i-1].ss;
        a.upd(v2[i].ff, k, val);
    }
    for(auto u : v1){
        a.add(u.ff, u.ss);
    }
    //cout << '\n';
}
vertex seg[100009];
void dfs(ll v){
    seg[v] = vertex(1, k);
    for(auto u : g[v]){
        dfs(u);
        merge(seg[v], seg[u]);
    }

    if(val[v].ff){
        seg[v].add(val[v].ff, val[v].ss+seg[v].get(1, val[v].ff));
    }
}
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    
    //freopen("in.txt", "r", stdin);
    //freopen("out.txt", "w", stdout);

    cin >> n >> m >> k;

    for(ll i = 2; i <= n; ++i){
        ll p;
        cin >> p;
        g[p].pb(i);
    }
    for(ll i = 0; i < m; ++i){
        ll v, d, w;
        cin >> v >> d >> w;
        val[v] = {d, w};
    }
    dfs(1);
    cout << seg[1].maxi << '\n';
}

Compilation message

magictree.cpp: In function 'void merge(vertex&, vertex&)':
magictree.cpp:120:21: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  120 |     for(ll i = 0; i < v2.size(); ++i){
      |                   ~~^~~~~~~~~~~

Subtask #1
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 8192 KB Output is correct
2 Correct 5 ms 8192 KB Output is correct
3 Correct 8 ms 8192 KB Output is correct
4 Correct 5 ms 8192 KB Output is correct
5 Correct 5 ms 8192 KB Output is correct
6 Correct 5 ms 8192 KB Output is correct
7 Correct 5 ms 8192 KB Output is correct
8 Correct 5 ms 8192 KB Output is correct
9 Correct 5 ms 8192 KB Output is correct

Subtask #2
3.0 / 3.0

# 결과 실행 시간 메모리 Grader output
1 Correct 202 ms 19060 KB Output is correct
2 Correct 104 ms 21240 KB Output is correct
3 Correct 598 ms 26352 KB Output is correct
4 Correct 246 ms 20208 KB Output is correct
5 Correct 293 ms 21368 KB Output is correct

Subtask #3
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 8448 KB Output is correct
2 Correct 6 ms 8448 KB Output is correct
3 Correct 5 ms 8448 KB Output is correct
4 Correct 98 ms 32248 KB Output is correct
5 Correct 101 ms 32248 KB Output is correct
6 Correct 136 ms 32248 KB Output is correct

Subtask #4
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 119 ms 11768 KB Output is correct
2 Correct 74 ms 11776 KB Output is correct
3 Correct 63 ms 16248 KB Output is correct
4 Correct 48 ms 10872 KB Output is correct
5 Correct 60 ms 22392 KB Output is correct

Subtask #5
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 8192 KB Output is correct
2 Correct 5 ms 8192 KB Output is correct
3 Correct 8 ms 8192 KB Output is correct
4 Correct 5 ms 8192 KB Output is correct
5 Correct 5 ms 8192 KB Output is correct
6 Correct 5 ms 8192 KB Output is correct
7 Correct 5 ms 8192 KB Output is correct
8 Correct 5 ms 8192 KB Output is correct
9 Correct 5 ms 8192 KB Output is correct
10 Correct 143 ms 11768 KB Output is correct
11 Correct 149 ms 11744 KB Output is correct
12 Correct 79 ms 16248 KB Output is correct
13 Correct 72 ms 10872 KB Output is correct
14 Correct 57 ms 22392 KB Output is correct

Subtask #6
13.0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 14 ms 9344 KB Output is correct
2 Correct 49 ms 12280 KB Output is correct
3 Correct 58 ms 12408 KB Output is correct
4 Correct 62 ms 12536 KB Output is correct
5 Correct 22 ms 11128 KB Output is correct
6 Correct 42 ms 14292 KB Output is correct
7 Correct 39 ms 17016 KB Output is correct

Subtask #7
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 8192 KB Output is correct
2 Correct 5 ms 8192 KB Output is correct
3 Correct 8 ms 8192 KB Output is correct
4 Correct 5 ms 8192 KB Output is correct
5 Correct 5 ms 8192 KB Output is correct
6 Correct 5 ms 8192 KB Output is correct
7 Correct 5 ms 8192 KB Output is correct
8 Correct 5 ms 8192 KB Output is correct
9 Correct 5 ms 8192 KB Output is correct
10 Correct 6 ms 8448 KB Output is correct
11 Correct 6 ms 8448 KB Output is correct
12 Correct 5 ms 8448 KB Output is correct
13 Correct 98 ms 32248 KB Output is correct
14 Correct 101 ms 32248 KB Output is correct
15 Correct 136 ms 32248 KB Output is correct
16 Correct 143 ms 11768 KB Output is correct
17 Correct 149 ms 11744 KB Output is correct
18 Correct 79 ms 16248 KB Output is correct
19 Correct 72 ms 10872 KB Output is correct
20 Correct 57 ms 22392 KB Output is correct
21 Correct 69 ms 9848 KB Output is correct
22 Correct 214 ms 13944 KB Output is correct
23 Correct 345 ms 23800 KB Output is correct
24 Correct 616 ms 26736 KB Output is correct
25 Correct 227 ms 21364 KB Output is correct
26 Correct 258 ms 30780 KB Output is correct
27 Correct 204 ms 33184 KB Output is correct

Subtask #8
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 8192 KB Output is correct
2 Correct 5 ms 8192 KB Output is correct
3 Correct 8 ms 8192 KB Output is correct
4 Correct 5 ms 8192 KB Output is correct
5 Correct 5 ms 8192 KB Output is correct
6 Correct 5 ms 8192 KB Output is correct
7 Correct 5 ms 8192 KB Output is correct
8 Correct 5 ms 8192 KB Output is correct
9 Correct 5 ms 8192 KB Output is correct
10 Correct 202 ms 19060 KB Output is correct
11 Correct 104 ms 21240 KB Output is correct
12 Correct 598 ms 26352 KB Output is correct
13 Correct 246 ms 20208 KB Output is correct
14 Correct 293 ms 21368 KB Output is correct
15 Correct 6 ms 8448 KB Output is correct
16 Correct 6 ms 8448 KB Output is correct
17 Correct 5 ms 8448 KB Output is correct
18 Correct 98 ms 32248 KB Output is correct
19 Correct 101 ms 32248 KB Output is correct
20 Correct 136 ms 32248 KB Output is correct
21 Correct 119 ms 11768 KB Output is correct
22 Correct 74 ms 11776 KB Output is correct
23 Correct 63 ms 16248 KB Output is correct
24 Correct 48 ms 10872 KB Output is correct
25 Correct 60 ms 22392 KB Output is correct
26 Correct 143 ms 11768 KB Output is correct
27 Correct 149 ms 11744 KB Output is correct
28 Correct 79 ms 16248 KB Output is correct
29 Correct 72 ms 10872 KB Output is correct
30 Correct 57 ms 22392 KB Output is correct
31 Correct 14 ms 9344 KB Output is correct
32 Correct 49 ms 12280 KB Output is correct
33 Correct 58 ms 12408 KB Output is correct
34 Correct 62 ms 12536 KB Output is correct
35 Correct 22 ms 11128 KB Output is correct
36 Correct 42 ms 14292 KB Output is correct
37 Correct 39 ms 17016 KB Output is correct
38 Correct 69 ms 9848 KB Output is correct
39 Correct 214 ms 13944 KB Output is correct
40 Correct 345 ms 23800 KB Output is correct
41 Correct 616 ms 26736 KB Output is correct
42 Correct 227 ms 21364 KB Output is correct
43 Correct 258 ms 30780 KB Output is correct
44 Correct 204 ms 33184 KB Output is correct
45 Correct 65 ms 10104 KB Output is correct
46 Correct 207 ms 14072 KB Output is correct
47 Correct 322 ms 22260 KB Output is correct
48 Correct 576 ms 29296 KB Output is correct
49 Correct 262 ms 22032 KB Output is correct
50 Correct 289 ms 31408 KB Output is correct
51 Correct 204 ms 34036 KB Output is correct