oj.uz

Submission #204629

# Submission time Handle Problem Language Result Execution time Memory
204629 2020-02-26T12:18:56 Z egekabas Construction of Highway (JOI18_construction) C++14
7 / 100
 2000 ms 26204 KB 
#include <bits/stdc++.h>
#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<int, int>  pii;
typedef pair<ld, ld>  pld;
int n;
vector<int> querry;
int val[100009];
vector<int> g[100009];
int prt[100009];
int subsz[100009];
int dfs1(int v){
    subsz[v] = 1;
    for(auto u : g[v]){
        prt[u] = v;
        dfs1(u);
        subsz[v] += subsz[u];
    }
}
int eul[100009];
int chain[100009];
ll cureul = 0;
int dfs2(int v){
    //cout << v << " -- " << cureul << '\n';
    eul[v] = cureul++;
    if(eul[prt[v]] == eul[v]-1)
        chain[v] = chain[prt[v]];
    else
        chain[v] = v;
    int biggest = 0, id = 0;
    for(auto u : g[v])
        if(subsz[u] > biggest){
            biggest = subsz[u];
            id = u;
        }
    if(id != 0)
        dfs2(id);
    for(auto u : g[v])
        if(u != id)
            dfs2(u);
}
struct node{
    map<int, int> mpp;
    int ret = 0;
};
node merge(node n1, node n2){
    node n = node();
    n.ret = n1.ret+n2.ret;
    auto it = n2.mpp.begin();
    int cur = 0;
    for(auto u : n1.mpp){
        while(it != n2.mpp.end() && (*it).ff < u.ff){
            cur += (*it).ss;
            ++it;
        }
        n.ret += cur*u.ss;
    }
    for(auto u : n1.mpp)
        n.mpp[u.ff] += u.ss;
    for(auto u : n2.mpp)
        n.mpp[u.ff] += u.ss;
    
    return n;
}
node seg[400009];
ll lazy[400009];
void push(ll v, ll tl, ll tm, ll tr){
    if(lazy[v] == 0) return;
    seg[2*v].ret = seg[2*v+1].ret = 0;
    seg[2*v].mpp.clear();
    seg[2*v+1].mpp.clear();
    
    seg[2*v].mpp[lazy[v]] = (tm-tl+1);
    seg[2*v+1].mpp[lazy[v]] = (tr-tm);
     
    lazy[2*v] = lazy[2*v+1] = lazy[v];
    lazy[v] = 0;
}
node get(ll v, ll tl, ll tr, ll l, ll r){
    if(r < tl || tr < l)
        return node();
    if(l <= tl && tr <= r)
        return seg[v];
    else{
        ll tm = (tl+tr)/2;
        push(v, tl, tm, tr);
        return merge(get(2*v, tl, tm, l, r), get(2*v+1, tm+1, tr, l, r));
    }
}
void upd(ll v, ll tl, ll tr, ll l, ll r, ll val){
    if(r < tl || tr < l)
        return;
    if(l <= tl && tr <= r){
        lazy[v] = val;
        seg[v].ret = 0;
        seg[v].mpp.clear();
        seg[v].mpp[val] = (tr-tl+1);
    }
    else{
        ll tm = (tl+tr)/2;
        push(v, tl, tm, tr);
        upd(2*v, tl, tm, l, r, val);
        upd(2*v+1, tm+1, tr, l, r, val);
        seg[v] = merge(seg[2*v], seg[2*v+1]);
    }
}
ll gettree(ll idx){
    node cur = node();
    while(idx != 0){
        cur = merge( get(1, 0, n-1, eul[chain[idx]], eul[idx]) ,cur);
        idx = prt[chain[idx]];
    }
    return cur.ret;
}
void updtree(ll idx, ll val){
    while(idx != 0){
        upd(1, 0, n-1, eul[chain[idx]], eul[idx], val);
        idx = prt[chain[idx]];
    }
}
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    
    //freopen("in.txt", "r", stdin);
    //freopen("out.txt", "w", stdout);

    cin >> n;
    for(int i = 1; i <= n; ++i)
        cin >> val[i];
    for(int i = 1; i < n; ++i){
        int x, y;
        cin >> x >> y;
        g[x].pb(y);
        querry.pb(y);
    }
    dfs1(1);
    dfs2(1);
    for(auto u : querry){
        cout << gettree(u) << '\n';
        updtree(u, val[u]);
    }
}

Compilation message

construction.cpp: In function 'int dfs1(int)':
construction.cpp:27:1: warning: no return statement in function returning non-void [-Wreturn-type]
 }
 ^
construction.cpp: In function 'int dfs2(int)':
construction.cpp:49:1: warning: no return statement in function returning non-void [-Wreturn-type]
 }
 ^

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 19 ms 24568 KB Output is correct
2 Correct 19 ms 24572 KB Output is correct
3 Correct 22 ms 24696 KB Output is correct
4 Correct 45 ms 24696 KB Output is correct
5 Correct 97 ms 24948 KB Output is correct
6 Correct 95 ms 24952 KB Output is correct
7 Correct 97 ms 24804 KB Output is correct
8 Correct 25 ms 24952 KB Output is correct
9 Correct 20 ms 24696 KB Output is correct
10 Correct 21 ms 24700 KB Output is correct
11 Correct 61 ms 24952 KB Output is correct
12 Correct 58 ms 24952 KB Output is correct
13 Correct 58 ms 24952 KB Output is correct
14 Correct 46 ms 24828 KB Output is correct
15 Correct 103 ms 24824 KB Output is correct
16 Correct 131 ms 24952 KB Output is correct
17 Correct 121 ms 24824 KB Output is correct
18 Correct 117 ms 24896 KB Output is correct
19 Correct 45 ms 24824 KB Output is correct
20 Correct 45 ms 24824 KB Output is correct
21 Correct 48 ms 24952 KB Output is correct
22 Correct 26 ms 24696 KB Output is correct
23 Correct 35 ms 24696 KB Output is correct
24 Correct 69 ms 24824 KB Output is correct
25 Correct 82 ms 24824 KB Output is correct
26 Correct 21 ms 24696 KB Output is correct
27 Correct 53 ms 24952 KB Output is correct
28 Correct 29 ms 24824 KB Output is correct
29 Correct 26 ms 24824 KB Output is correct
30 Correct 106 ms 24824 KB Output is correct
31 Correct 56 ms 24824 KB Output is correct
32 Correct 27 ms 24696 KB Output is correct
33 Correct 52 ms 24824 KB Output is correct
34 Correct 57 ms 24824 KB Output is correct
35 Correct 64 ms 24952 KB Output is correct
36 Correct 29 ms 24824 KB Output is correct
37 Correct 33 ms 24696 KB Output is correct
38 Correct 32 ms 24700 KB Output is correct
39 Correct 52 ms 24952 KB Output is correct
40 Correct 54 ms 24824 KB Output is correct
41 Correct 56 ms 24828 KB Output is correct
42 Correct 29 ms 24824 KB Output is correct
43 Correct 32 ms 24696 KB Output is correct
44 Correct 32 ms 24696 KB Output is correct

Subtask #2
0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 19 ms 24568 KB Output is correct
2 Correct 19 ms 24572 KB Output is correct
3 Correct 22 ms 24696 KB Output is correct
4 Correct 45 ms 24696 KB Output is correct
5 Correct 97 ms 24948 KB Output is correct
6 Correct 95 ms 24952 KB Output is correct
7 Correct 97 ms 24804 KB Output is correct
8 Correct 25 ms 24952 KB Output is correct
9 Correct 20 ms 24696 KB Output is correct
10 Correct 21 ms 24700 KB Output is correct
11 Correct 61 ms 24952 KB Output is correct
12 Correct 58 ms 24952 KB Output is correct
13 Correct 58 ms 24952 KB Output is correct
14 Correct 46 ms 24828 KB Output is correct
15 Correct 103 ms 24824 KB Output is correct
16 Correct 131 ms 24952 KB Output is correct
17 Correct 121 ms 24824 KB Output is correct
18 Correct 117 ms 24896 KB Output is correct
19 Correct 45 ms 24824 KB Output is correct
20 Correct 45 ms 24824 KB Output is correct
21 Correct 48 ms 24952 KB Output is correct
22 Correct 26 ms 24696 KB Output is correct
23 Correct 35 ms 24696 KB Output is correct
24 Correct 69 ms 24824 KB Output is correct
25 Correct 82 ms 24824 KB Output is correct
26 Correct 21 ms 24696 KB Output is correct
27 Correct 53 ms 24952 KB Output is correct
28 Correct 29 ms 24824 KB Output is correct
29 Correct 26 ms 24824 KB Output is correct
30 Correct 106 ms 24824 KB Output is correct
31 Correct 56 ms 24824 KB Output is correct
32 Correct 27 ms 24696 KB Output is correct
33 Correct 52 ms 24824 KB Output is correct
34 Correct 57 ms 24824 KB Output is correct
35 Correct 64 ms 24952 KB Output is correct
36 Correct 29 ms 24824 KB Output is correct
37 Correct 33 ms 24696 KB Output is correct
38 Correct 32 ms 24700 KB Output is correct
39 Correct 52 ms 24952 KB Output is correct
40 Correct 54 ms 24824 KB Output is correct
41 Correct 56 ms 24828 KB Output is correct
42 Correct 29 ms 24824 KB Output is correct
43 Correct 32 ms 24696 KB Output is correct
44 Correct 32 ms 24696 KB Output is correct
45 Correct 349 ms 25208 KB Output is correct
46 Execution timed out 2089 ms 26204 KB Time limit exceeded
47 Halted 0 ms 0 KB -

Subtask #3
0 / 84.0

# Verdict Execution time Memory Grader output
1 Correct 19 ms 24568 KB Output is correct
2 Correct 19 ms 24572 KB Output is correct
3 Correct 22 ms 24696 KB Output is correct
4 Correct 45 ms 24696 KB Output is correct
5 Correct 97 ms 24948 KB Output is correct
6 Correct 95 ms 24952 KB Output is correct
7 Correct 97 ms 24804 KB Output is correct
8 Correct 25 ms 24952 KB Output is correct
9 Correct 20 ms 24696 KB Output is correct
10 Correct 21 ms 24700 KB Output is correct
11 Correct 61 ms 24952 KB Output is correct
12 Correct 58 ms 24952 KB Output is correct
13 Correct 58 ms 24952 KB Output is correct
14 Correct 46 ms 24828 KB Output is correct
15 Correct 103 ms 24824 KB Output is correct
16 Correct 131 ms 24952 KB Output is correct
17 Correct 121 ms 24824 KB Output is correct
18 Correct 117 ms 24896 KB Output is correct
19 Correct 45 ms 24824 KB Output is correct
20 Correct 45 ms 24824 KB Output is correct
21 Correct 48 ms 24952 KB Output is correct
22 Correct 26 ms 24696 KB Output is correct
23 Correct 35 ms 24696 KB Output is correct
24 Correct 69 ms 24824 KB Output is correct
25 Correct 82 ms 24824 KB Output is correct
26 Correct 21 ms 24696 KB Output is correct
27 Correct 53 ms 24952 KB Output is correct
28 Correct 29 ms 24824 KB Output is correct
29 Correct 26 ms 24824 KB Output is correct
30 Correct 106 ms 24824 KB Output is correct
31 Correct 56 ms 24824 KB Output is correct
32 Correct 27 ms 24696 KB Output is correct
33 Correct 52 ms 24824 KB Output is correct
34 Correct 57 ms 24824 KB Output is correct
35 Correct 64 ms 24952 KB Output is correct
36 Correct 29 ms 24824 KB Output is correct
37 Correct 33 ms 24696 KB Output is correct
38 Correct 32 ms 24700 KB Output is correct
39 Correct 52 ms 24952 KB Output is correct
40 Correct 54 ms 24824 KB Output is correct
41 Correct 56 ms 24828 KB Output is correct
42 Correct 29 ms 24824 KB Output is correct
43 Correct 32 ms 24696 KB Output is correct
44 Correct 32 ms 24696 KB Output is correct
45 Correct 349 ms 25208 KB Output is correct
46 Execution timed out 2089 ms 26204 KB Time limit exceeded
47 Halted 0 ms 0 KB -