oj.uz

답안 #251823

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
251823 2020-07-22T10:44:34 Z Vimmer Uzastopni (COCI15_uzastopni) C++14
40 / 160
 500 ms 2040 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;

bool mk[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)
    {
        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++;}
    }
    else
    {
        for (auto it : val[v])
        {
            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;

            found = 0;

            rec(l, r);
        }


    cout << ans << endl;
}

Subtask #1
40.0 / 160.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1084 ms 1024 KB Time limit exceeded
2 Execution timed out 1088 ms 1024 KB Time limit exceeded
3 Execution timed out 1092 ms 1024 KB Time limit exceeded
4 Incorrect 63 ms 1024 KB Output isn't correct
5 Execution timed out 1094 ms 1024 KB Time limit exceeded
6 Correct 8 ms 1024 KB Output is correct
7 Correct 10 ms 1024 KB Output is correct
8 Correct 3 ms 1024 KB Output is correct
9 Correct 1 ms 1024 KB Output is correct
10 Correct 2 ms 1024 KB Output is correct
11 Execution timed out 1093 ms 1528 KB Time limit exceeded
12 Execution timed out 1088 ms 1536 KB Time limit exceeded
13 Execution timed out 1088 ms 1932 KB Time limit exceeded
14 Execution timed out 1095 ms 1920 KB Time limit exceeded
15 Execution timed out 1090 ms 2040 KB Time limit exceeded
16 Execution timed out 1086 ms 2040 KB Time limit exceeded
17 Execution timed out 1077 ms 1784 KB Time limit exceeded
18 Execution timed out 1086 ms 1896 KB Time limit exceeded
19 Execution timed out 1092 ms 1408 KB Time limit exceeded
20 Execution timed out 1082 ms 1404 KB Time limit exceeded