oj.uz

답안 #251835

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
251835 2020-07-22T10:56:01 Z Vimmer Uzastopni (COCI15_uzastopni) C++14
96 / 160
 500 ms 2168 KB 
#include <bits/stdc++.h>
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>

#pragma GCC optimize("unroll-loops")
#pragma GCC optimize("-O3")
#pragma GCC optimize("Ofast")
//#pragma GCC optimize("fast-math")
//#pragma GCC optimize("no-stack-protector")

#define F first
#define S second
#define sz(x) int(x.size())
#define pb push_back
#define pf push_front
#define N 10010
#define M ll(10007)
#define inf 1e9 + 1e9

using namespace std;
//using namespace __gnu_pbds;

typedef long double ld;
typedef long long ll;
typedef unsigned long long ull;
typedef short int si;
typedef array <int, 3> a3;
typedef array <int, 4> a4;
typedef pair <int, int> pt;
//typedef tree <int, null_type, less_equal<int>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;


int n, ans, from[N], a[N], siz[N], h[N], l, r, kol;

bool mk[105], mkr[105][105];

vector <int> val[105], gr;

set <int> st[N];

vector <int> g[N];

bool bad, found;

void dfs_rev(int v)
{
    st[v].insert(a[v]);

    int lst = -1;

    for (auto it : st[v])
    {
        if (lst != -1 && it - lst != 1) {bad = 1; return;}

        lst = it;
    }

    if (v != 1)
    {
        int nxt = from[v];

        if (nxt == 0) {bad = 1; return;}

        //if (sz(st[nxt]) < sz(st[v])) swap(st[v], st[nxt]);

        for (auto it : st[v]) st[nxt].insert(it);
    }
    else if (r - l + 1 != sz(st[v])) bad = 1;

}

bool cmp(int x, int y) {return h[x] > h[y];}
bool cmpr(int x, int y) {return h[x] < h[y];}

void dfs(int v)
{
    siz[v] = 1;

    for (auto it : g[v])
    {
        h[it] = h[v] + 1;

        dfs(it);

        siz[v] += siz[it];
    }
}

void rec(int v, int r)
{
    if (r + 1 == v)
    {
        if (!found)
        {
            kol++;

            bad = 0;

            vector <int> pr = gr;

            sort(pr.begin(), pr.end(), cmp);

            for (auto it : pr) {dfs_rev(it); if (bad) break;}

            if (!bad) {found = 1; ans++;}

            if (kol == 10) found = 1;
        }
    }
    else
    {
        for (auto it : val[v])
        {
            if (found) break;

            gr.pb(it);

            st[it].clear();

            rec(v + 1, r);

            if (found) break;
        }
    }

    if (sz(gr) != 0) gr.pop_back();
}
int main()
{
    //freopen("mining.in", "r", stdin); freopen("mining.out", "w", stdout);

    ios_base::sync_with_stdio(0); istream::sync_with_stdio(0); cin.tie(0); cout.tie(0);

    cin >> n;

    for (int i = 1; i <= n; i++) {cin >> a[i]; val[a[i]].pb(i); mk[a[i]] = 1;}

    for (int i = 1; i < n; i++)
    {
        int x, y;

        cin >> x >> y;

        g[x].pb(y);

        from[y] = x;
    }

    dfs(1);

    for (l = 1; l <= 100; l++)
      if (mk[l])
        for (r = l; r <= 100; r++)
        {
            if (!mk[r]) break;

            if (!(l <= a[1] && a[1] <= r)) continue;

            bad = 0;

            vector <int> gr; gr.clear();

            for (int i = 1; i <= n; i++) st[i].clear();

            for (int i = l; i <= r; i++) gr.pb(val[i][0]);

            sort(gr.begin(), gr.end(), cmp);

            for (auto it : gr) {dfs_rev(it); if (bad) break;}

            if (!bad) {mkr[l][r] = 1; ans++;}
        }

    for (int i = 1; i <= 100; i++) sort(val[i].begin(), val[i].end(), cmpr);

    for (l = 1; l <= 100; l++)
      if (mk[l])
        for (r = l; r <= 100; r++)
        {
            if (!mk[r]) break;

            if (mkr[l][r]) continue;

            if (!(l <= a[1] && a[1] <= r)) continue;

            bad = 0;

            vector <int> gr; gr.clear();

            for (int i = 1; i <= n; i++) st[i].clear();

            for (int i = l; i <= r; i++) gr.pb(val[i][0]);

            sort(gr.begin(), gr.end(), cmp);

            for (auto it : gr) {dfs_rev(it); if (bad) break;}

            if (!bad) {mkr[l][r] = 1; ans++;}
        }

    for (int i = 1; i <= n; i++) st[i].clear();

    for (l = 1; l <= 100; l++)
      if (mk[l])
        for (r = l; r <= 100; r++)
        {
            if (!mk[r]) break;

            if (mkr[l][r]) continue;

            if (!(l <= a[1] && a[1] <= r)) continue;

            gr.clear();

            kol = 0;

            found = 0;

            rec(l, r);
        }


    cout << ans << endl;
}

Subtask #1
96.0 / 160.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 1024 KB Output isn't correct
2 Incorrect 1 ms 1024 KB Output isn't correct
3 Correct 1 ms 1024 KB Output is correct
4 Incorrect 1 ms 1024 KB Output isn't correct
5 Incorrect 1 ms 1024 KB Output isn't correct
6 Correct 27 ms 1152 KB Output is correct
7 Correct 43 ms 1152 KB Output is correct
8 Correct 9 ms 1024 KB Output is correct
9 Correct 2 ms 1024 KB Output is correct
10 Correct 2 ms 1024 KB Output is correct
11 Correct 5 ms 1408 KB Output is correct
12 Incorrect 6 ms 1408 KB Output isn't correct
13 Correct 5 ms 1408 KB Output is correct
14 Execution timed out 588 ms 2040 KB Time limit exceeded
15 Incorrect 382 ms 2168 KB Output isn't correct
16 Execution timed out 731 ms 2040 KB Time limit exceeded
17 Correct 6 ms 1408 KB Output is correct
18 Correct 5 ms 1408 KB Output is correct
19 Correct 72 ms 1376 KB Output is correct
20 Correct 74 ms 1280 KB Output is correct