oj.uz

Submission #253909

# Submission time Handle Problem Language Result Execution time Memory
253909 2020-07-29T05:42:29 Z IgorI Cats or Dogs (JOI18_catdog) C++17
100 / 100
 330 ms 64680 KB 
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

const int INF = 1e8;
const int N = 100002;

struct Table{
    int a00, a01, a10, a11;
};

Table Merge(Table &A, Table &B)
{
    Table S;
    S.a00 = min(min(A.a00 + B.a00, A.a01 + B.a10), min(A.a00 + B.a10, A.a01 + B.a00) + 1);
    S.a01 = min(min(A.a00 + B.a01, A.a01 + B.a11), min(A.a00 + B.a11, A.a01 + B.a01) + 1);
    S.a11 = min(min(A.a10 + B.a01, A.a11 + B.a11), min(A.a10 + B.a11, A.a11 + B.a01) + 1);
    S.a10 = min(min(A.a10 + B.a00, A.a11 + B.a10), min(A.a10 + B.a10, A.a11 + B.a00) + 1);
    return S;
}

struct Sollution{
    vector<Table> tree;
    void build(int L, int R, int V)
    {
        if (L + 1 == R)
        {
            tree[V].a01 = INF;
            tree[V].a10 = INF;
            return;
        }
        tree[V].a01 = 1;
        tree[V].a10 = 1;
        int M = (L + R) / 2;
        build(L, M, 2 * V + 1);
        build(M, R, 2 * V + 2);
    }
    Sollution(int _n)
    {
        tree.resize(4 * _n);
        build(0, _n, 0);
    }
    void __Change(int pos, int cost0, int cost1, int L, int R, int V)
    {
        if (L + 1 == R)
        {
            tree[V].a00 += cost0;
            tree[V].a11 += cost1;
            return;
        }
        int M = (L + R) / 2;
        if (pos < M) __Change(pos, cost0, cost1, L, M, 2 * V + 1);
        else __Change(pos, cost0, cost1, M, R, 2 * V + 2);
        tree[V] = Merge(tree[2 * V + 1], tree[2 * V + 2]);
    }
    void Change(int pos, int cost0, int cost1)
    {
        __Change(pos, cost0, cost1, 0, tree.size() / 4, 0);
    }
    void Cost(int &d0, int &d1)
    {
        int minc0 = min(tree[0].a00, tree[0].a01), minc1 = min(tree[0].a10, tree[0].a11);
        d0 = min(minc0, minc1 + 1);
        d1 = min(minc0 + 1, minc1);
    }
};

ll n;
vector<int> graph[N];
ll x[N];
ll papa[N];
ll sz[N];

int main_child[N];
vector<int> other_child[N];
vector<vector<int> > route;
vector<Sollution> hld;
int route_pos[N];
int route_id[N];

void dfs1(int v, int p)
{
    papa[v] = p;
    sz[v] = 1;
    for (auto u : graph[v]) if (u != p)
    {
        dfs1(u, v);
        sz[v] += sz[u];
    }
}

void dfs2(int v, int p)
{
    int mxsz = 0, id = -1;
    for (auto u : graph[v]) if (u != p)
    {
        if (sz[u] > mxsz)
        {
            mxsz = sz[u];
            id = u;
        }
    }
    main_child[v] = id;
    for (auto u : graph[v]) if (u != p)
    {
        dfs2(u, v);
        if (u != id) other_child[v].push_back(u);
    }
}

int answer()
{
    Table T = hld[0].tree[0];
    return min(min(T.a00, T.a01), min(T.a10, T.a11));
}

void initialize(int n0, vector<int> a, vector<int> b)
{
    n = n0;
    for (int i = 0; i < n - 1; i++)
    {
        a[i]--, b[i]--;
        graph[a[i]].push_back(b[i]);
        graph[b[i]].push_back(a[i]);
    }
    for (int i = 0; i < n; i++)
    {
        x[i] = -1;
    }
    dfs1(0, 0);
    dfs2(0, 0);
    for (int i = 0; i < n; i++)
    {
        route_id[i] = -1;
        route_pos[i] = -1;
    }
    for (int i = 0; i < n; i++)
    {
        if (route_id[i] == -1)
        {
            vector<int> r;
            int x = i;
            while (x != -1)
            {
                r.push_back(x);
                x = main_child[x];
            }
            for (int j = 0; j < r.size(); j++)
            {
                route_id[r[j]] = route.size();
                route_pos[r[j]] = j;
            }
            route.push_back(r);
            hld.push_back(Sollution(r.size()));
        }
    }
}

void Change(int v, int cost0, int cost1)
{
    int x = route_id[v];
    int y = route_pos[v];
    int oldd0, oldd1, d0, d1;
    hld[x].Cost(oldd0, oldd1);
    hld[x].Change(y, cost0, cost1);
    hld[x].Cost(d0, d1);
    v = route[x][0];
    if (v == 0) return;
    v = papa[v];
    Change(v, d0 - oldd0, d1 - oldd1);
}

int cat(int v)
{
    v--;
    x[v] = 0;
    Change(v, 0, INF);
    return answer();
}

int dog(int v)
{
    v--;
    x[v] = 1;
    Change(v, INF, 0);
    return answer();
}

int neighbor(int v)
{
    v--;
    if (x[v] == 0) Change(v, 0, -INF);
    if (x[v] == 1) Change(v, -INF, 0);
    x[v] = -1;
    return answer();
}

Compilation message

catdog.cpp: In function 'void initialize(int, std::vector<int>, std::vector<int>)':
catdog.cpp:150:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for (int j = 0; j < r.size(); j++)
                             ~~^~~~~~~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4992 KB Output is correct
2 Correct 3 ms 4992 KB Output is correct
3 Correct 3 ms 4992 KB Output is correct
4 Correct 3 ms 4992 KB Output is correct
5 Correct 3 ms 4992 KB Output is correct
6 Correct 4 ms 4992 KB Output is correct
7 Correct 3 ms 4992 KB Output is correct
8 Correct 3 ms 4992 KB Output is correct
9 Correct 3 ms 4992 KB Output is correct
10 Correct 3 ms 4992 KB Output is correct
11 Correct 3 ms 4992 KB Output is correct
12 Correct 3 ms 4992 KB Output is correct
13 Correct 3 ms 4992 KB Output is correct
14 Correct 3 ms 4992 KB Output is correct
15 Correct 3 ms 4992 KB Output is correct
16 Correct 3 ms 4992 KB Output is correct

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4992 KB Output is correct
2 Correct 3 ms 4992 KB Output is correct
3 Correct 3 ms 4992 KB Output is correct
4 Correct 3 ms 4992 KB Output is correct
5 Correct 3 ms 4992 KB Output is correct
6 Correct 4 ms 4992 KB Output is correct
7 Correct 3 ms 4992 KB Output is correct
8 Correct 3 ms 4992 KB Output is correct
9 Correct 3 ms 4992 KB Output is correct
10 Correct 3 ms 4992 KB Output is correct
11 Correct 3 ms 4992 KB Output is correct
12 Correct 3 ms 4992 KB Output is correct
13 Correct 3 ms 4992 KB Output is correct
14 Correct 3 ms 4992 KB Output is correct
15 Correct 3 ms 4992 KB Output is correct
16 Correct 3 ms 4992 KB Output is correct
17 Correct 6 ms 5248 KB Output is correct
18 Correct 4 ms 5248 KB Output is correct
19 Correct 4 ms 5248 KB Output is correct
20 Correct 5 ms 5120 KB Output is correct
21 Correct 4 ms 5120 KB Output is correct
22 Correct 4 ms 5120 KB Output is correct
23 Correct 4 ms 5248 KB Output is correct
24 Correct 6 ms 5248 KB Output is correct
25 Correct 4 ms 5120 KB Output is correct
26 Correct 4 ms 5120 KB Output is correct
27 Correct 4 ms 5120 KB Output is correct
28 Correct 4 ms 5248 KB Output is correct
29 Correct 6 ms 5248 KB Output is correct
30 Correct 4 ms 5120 KB Output is correct
31 Correct 4 ms 5248 KB Output is correct
32 Correct 3 ms 5120 KB Output is correct

Subtask #3
62.0 / 62.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4992 KB Output is correct
2 Correct 3 ms 4992 KB Output is correct
3 Correct 3 ms 4992 KB Output is correct
4 Correct 3 ms 4992 KB Output is correct
5 Correct 3 ms 4992 KB Output is correct
6 Correct 4 ms 4992 KB Output is correct
7 Correct 3 ms 4992 KB Output is correct
8 Correct 3 ms 4992 KB Output is correct
9 Correct 3 ms 4992 KB Output is correct
10 Correct 3 ms 4992 KB Output is correct
11 Correct 3 ms 4992 KB Output is correct
12 Correct 3 ms 4992 KB Output is correct
13 Correct 3 ms 4992 KB Output is correct
14 Correct 3 ms 4992 KB Output is correct
15 Correct 3 ms 4992 KB Output is correct
16 Correct 3 ms 4992 KB Output is correct
17 Correct 6 ms 5248 KB Output is correct
18 Correct 4 ms 5248 KB Output is correct
19 Correct 4 ms 5248 KB Output is correct
20 Correct 5 ms 5120 KB Output is correct
21 Correct 4 ms 5120 KB Output is correct
22 Correct 4 ms 5120 KB Output is correct
23 Correct 4 ms 5248 KB Output is correct
24 Correct 6 ms 5248 KB Output is correct
25 Correct 4 ms 5120 KB Output is correct
26 Correct 4 ms 5120 KB Output is correct
27 Correct 4 ms 5120 KB Output is correct
28 Correct 4 ms 5248 KB Output is correct
29 Correct 6 ms 5248 KB Output is correct
30 Correct 4 ms 5120 KB Output is correct
31 Correct 4 ms 5248 KB Output is correct
32 Correct 3 ms 5120 KB Output is correct
33 Correct 151 ms 18776 KB Output is correct
34 Correct 102 ms 21600 KB Output is correct
35 Correct 128 ms 14432 KB Output is correct
36 Correct 258 ms 28712 KB Output is correct
37 Correct 39 ms 12912 KB Output is correct
38 Correct 308 ms 31440 KB Output is correct
39 Correct 330 ms 31476 KB Output is correct
40 Correct 281 ms 31440 KB Output is correct
41 Correct 260 ms 31696 KB Output is correct
42 Correct 257 ms 31564 KB Output is correct
43 Correct 262 ms 31396 KB Output is correct
44 Correct 254 ms 31440 KB Output is correct
45 Correct 263 ms 31436 KB Output is correct
46 Correct 272 ms 31440 KB Output is correct
47 Correct 253 ms 31440 KB Output is correct
48 Correct 97 ms 23776 KB Output is correct
49 Correct 120 ms 28248 KB Output is correct
50 Correct 35 ms 9840 KB Output is correct
51 Correct 47 ms 14436 KB Output is correct
52 Correct 23 ms 9720 KB Output is correct
53 Correct 160 ms 30688 KB Output is correct
54 Correct 84 ms 15976 KB Output is correct
55 Correct 215 ms 23000 KB Output is correct
56 Correct 118 ms 17040 KB Output is correct
57 Correct 197 ms 28512 KB Output is correct
58 Correct 47 ms 15452 KB Output is correct
59 Correct 46 ms 13160 KB Output is correct
60 Correct 114 ms 25432 KB Output is correct
61 Correct 111 ms 26328 KB Output is correct
62 Correct 80 ms 23392 KB Output is correct
63 Correct 62 ms 26136 KB Output is correct
64 Correct 63 ms 28212 KB Output is correct
65 Correct 127 ms 46692 KB Output is correct
66 Correct 53 ms 11256 KB Output is correct
67 Correct 82 ms 32560 KB Output is correct
68 Correct 146 ms 46588 KB Output is correct
69 Correct 28 ms 6784 KB Output is correct
70 Correct 8 ms 5248 KB Output is correct
71 Correct 57 ms 15072 KB Output is correct
72 Correct 89 ms 25056 KB Output is correct
73 Correct 156 ms 30360 KB Output is correct
74 Correct 194 ms 64680 KB Output is correct
75 Correct 144 ms 31476 KB Output is correct
76 Correct 153 ms 35732 KB Output is correct
77 Correct 189 ms 54292 KB Output is correct