oj.uz

Submission #204639

# Submission time Handle Problem Language Result Execution time Memory
204639 2020-02-26T12:32:47 Z egekabas Construction of Highway (JOI18_construction) C++14
7 / 100
 2000 ms 26104 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];
void 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];
int cureul = 0;
void 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;
}
void mergeref(node &n1, node &n2, node &n){
    n.ret = n1.ret+n2.ret;
    n.mpp.clear();
    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;
}
node seg[400009];
int lazy[400009];
void push(int v, int tl, int tm, int 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(int v, int tl, int tr, int l, int r){
    if(r < tl || tr < l)
        return node();
    if(l <= tl && tr <= r)
        return seg[v];
    else{
        int 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(int v, int tl, int tr, int l, int r, int 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{
        int 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);
        mergeref(seg[2*v], seg[2*v+1], seg[v]);
    }
}
int gettree(int 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(int idx, int val){
    while(idx != 0){
        upd(1, 0, n-1, eul[chain[idx]], eul[idx], val);
        idx = prt[chain[idx]];
    }
}
int main() {
    
    //freopen("in.txt", "r", stdin);
    //freopen("out.txt", "w", stdout);
    
    scanf("%d", &n);
    for(int i = 1; i <= n; ++i)
        cin >> val[i];
    for(int i = 1; i < n; ++i){
        int x, y;
        scanf("%d%d", &x, &y);
        g[x].pb(y);
        querry.pb(y);
    }
    dfs1(1);
    dfs2(1);
    for(auto u : querry){
        printf("%d\n", gettree(u));
        updtree(u, val[u]);
    }
}

Compilation message

construction.cpp: In function 'int main()':
construction.cpp:151:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &n);
     ~~~~~^~~~~~~~~~
construction.cpp:156:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d", &x, &y);
         ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 19 ms 24696 KB Output is correct
2 Correct 19 ms 24568 KB Output is correct
3 Correct 21 ms 24696 KB Output is correct
4 Correct 38 ms 24696 KB Output is correct
5 Correct 80 ms 24872 KB Output is correct
6 Correct 71 ms 24824 KB Output is correct
7 Correct 74 ms 24824 KB Output is correct
8 Correct 21 ms 24696 KB Output is correct
9 Correct 20 ms 24696 KB Output is correct
10 Correct 23 ms 24696 KB Output is correct
11 Correct 47 ms 24824 KB Output is correct
12 Correct 48 ms 24824 KB Output is correct
13 Correct 47 ms 24872 KB Output is correct
14 Correct 39 ms 24824 KB Output is correct
15 Correct 78 ms 24824 KB Output is correct
16 Correct 91 ms 24824 KB Output is correct
17 Correct 92 ms 24824 KB Output is correct
18 Correct 90 ms 24824 KB Output is correct
19 Correct 38 ms 24824 KB Output is correct
20 Correct 38 ms 24824 KB Output is correct
21 Correct 39 ms 24824 KB Output is correct
22 Correct 24 ms 24696 KB Output is correct
23 Correct 31 ms 24696 KB Output is correct
24 Correct 48 ms 24824 KB Output is correct
25 Correct 63 ms 24824 KB Output is correct
26 Correct 21 ms 24696 KB Output is correct
27 Correct 43 ms 24880 KB Output is correct
28 Correct 26 ms 24800 KB Output is correct
29 Correct 24 ms 24696 KB Output is correct
30 Correct 78 ms 24824 KB Output is correct
31 Correct 46 ms 24696 KB Output is correct
32 Correct 25 ms 24696 KB Output is correct
33 Correct 42 ms 24824 KB Output is correct
34 Correct 48 ms 24824 KB Output is correct
35 Correct 48 ms 24824 KB Output is correct
36 Correct 26 ms 24696 KB Output is correct
37 Correct 27 ms 24696 KB Output is correct
38 Correct 29 ms 24824 KB Output is correct
39 Correct 43 ms 24824 KB Output is correct
40 Correct 44 ms 24824 KB Output is correct
41 Correct 47 ms 24824 KB Output is correct
42 Correct 26 ms 24696 KB Output is correct
43 Correct 28 ms 24696 KB Output is correct
44 Correct 31 ms 24696 KB Output is correct

Subtask #2
0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 19 ms 24696 KB Output is correct
2 Correct 19 ms 24568 KB Output is correct
3 Correct 21 ms 24696 KB Output is correct
4 Correct 38 ms 24696 KB Output is correct
5 Correct 80 ms 24872 KB Output is correct
6 Correct 71 ms 24824 KB Output is correct
7 Correct 74 ms 24824 KB Output is correct
8 Correct 21 ms 24696 KB Output is correct
9 Correct 20 ms 24696 KB Output is correct
10 Correct 23 ms 24696 KB Output is correct
11 Correct 47 ms 24824 KB Output is correct
12 Correct 48 ms 24824 KB Output is correct
13 Correct 47 ms 24872 KB Output is correct
14 Correct 39 ms 24824 KB Output is correct
15 Correct 78 ms 24824 KB Output is correct
16 Correct 91 ms 24824 KB Output is correct
17 Correct 92 ms 24824 KB Output is correct
18 Correct 90 ms 24824 KB Output is correct
19 Correct 38 ms 24824 KB Output is correct
20 Correct 38 ms 24824 KB Output is correct
21 Correct 39 ms 24824 KB Output is correct
22 Correct 24 ms 24696 KB Output is correct
23 Correct 31 ms 24696 KB Output is correct
24 Correct 48 ms 24824 KB Output is correct
25 Correct 63 ms 24824 KB Output is correct
26 Correct 21 ms 24696 KB Output is correct
27 Correct 43 ms 24880 KB Output is correct
28 Correct 26 ms 24800 KB Output is correct
29 Correct 24 ms 24696 KB Output is correct
30 Correct 78 ms 24824 KB Output is correct
31 Correct 46 ms 24696 KB Output is correct
32 Correct 25 ms 24696 KB Output is correct
33 Correct 42 ms 24824 KB Output is correct
34 Correct 48 ms 24824 KB Output is correct
35 Correct 48 ms 24824 KB Output is correct
36 Correct 26 ms 24696 KB Output is correct
37 Correct 27 ms 24696 KB Output is correct
38 Correct 29 ms 24824 KB Output is correct
39 Correct 43 ms 24824 KB Output is correct
40 Correct 44 ms 24824 KB Output is correct
41 Correct 47 ms 24824 KB Output is correct
42 Correct 26 ms 24696 KB Output is correct
43 Correct 28 ms 24696 KB Output is correct
44 Correct 31 ms 24696 KB Output is correct
45 Correct 261 ms 24948 KB Output is correct
46 Execution timed out 2081 ms 26104 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 24696 KB Output is correct
2 Correct 19 ms 24568 KB Output is correct
3 Correct 21 ms 24696 KB Output is correct
4 Correct 38 ms 24696 KB Output is correct
5 Correct 80 ms 24872 KB Output is correct
6 Correct 71 ms 24824 KB Output is correct
7 Correct 74 ms 24824 KB Output is correct
8 Correct 21 ms 24696 KB Output is correct
9 Correct 20 ms 24696 KB Output is correct
10 Correct 23 ms 24696 KB Output is correct
11 Correct 47 ms 24824 KB Output is correct
12 Correct 48 ms 24824 KB Output is correct
13 Correct 47 ms 24872 KB Output is correct
14 Correct 39 ms 24824 KB Output is correct
15 Correct 78 ms 24824 KB Output is correct
16 Correct 91 ms 24824 KB Output is correct
17 Correct 92 ms 24824 KB Output is correct
18 Correct 90 ms 24824 KB Output is correct
19 Correct 38 ms 24824 KB Output is correct
20 Correct 38 ms 24824 KB Output is correct
21 Correct 39 ms 24824 KB Output is correct
22 Correct 24 ms 24696 KB Output is correct
23 Correct 31 ms 24696 KB Output is correct
24 Correct 48 ms 24824 KB Output is correct
25 Correct 63 ms 24824 KB Output is correct
26 Correct 21 ms 24696 KB Output is correct
27 Correct 43 ms 24880 KB Output is correct
28 Correct 26 ms 24800 KB Output is correct
29 Correct 24 ms 24696 KB Output is correct
30 Correct 78 ms 24824 KB Output is correct
31 Correct 46 ms 24696 KB Output is correct
32 Correct 25 ms 24696 KB Output is correct
33 Correct 42 ms 24824 KB Output is correct
34 Correct 48 ms 24824 KB Output is correct
35 Correct 48 ms 24824 KB Output is correct
36 Correct 26 ms 24696 KB Output is correct
37 Correct 27 ms 24696 KB Output is correct
38 Correct 29 ms 24824 KB Output is correct
39 Correct 43 ms 24824 KB Output is correct
40 Correct 44 ms 24824 KB Output is correct
41 Correct 47 ms 24824 KB Output is correct
42 Correct 26 ms 24696 KB Output is correct
43 Correct 28 ms 24696 KB Output is correct
44 Correct 31 ms 24696 KB Output is correct
45 Correct 261 ms 24948 KB Output is correct
46 Execution timed out 2081 ms 26104 KB Time limit exceeded
47 Halted 0 ms 0 KB -