oj.uz

Submission #251761

# Submission time Handle Problem Language Result Execution time Memory
251761 2020-07-22T09:34:29 Z Vimmer Uzastopni (COCI15_uzastopni) C++14
24 / 160
 14 ms 896 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, val[105], ans, from[N], a[N];

set <int> se;

vector <int> g[N];

bool mk[N], bad;

void dfs_rev(int v)
{
    while (1)
    {
        if (se.find(v) == se.end()) {bad = 1; return;}

        if (mk[v] || v == 1) return;

        int nxt = from[v];

        if (abs(a[nxt] - a[v]) != 1) {bad = 1; return;}

        mk[v] = 1;

        v = nxt;
    }
}

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]] = i;}

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

        cin >> x >> y;

        g[x].pb(y);

        from[y] = x;
    }

    for (int l = 1; l <= 100; l++)
        for (int r = l; r <= 100; r++)
            if (l <= a[1] && a[1] <= r)
            {
                bad = 0;

                se.clear();

                for (int i = l; i <= r; i++) if (val[i] == 0) {bad = 1; break;} else se.insert(val[i]);

                if (bad) continue;

                memset(mk, 0, sizeof(mk));

                for (int i = l; i <= r && !bad; i++) dfs_rev(val[i]);

                if (!bad) ans++;
            }

    cout << ans << endl;
}

Subtask #1
24.0 / 160.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 640 KB Output isn't correct
2 Incorrect 1 ms 640 KB Output isn't correct
3 Incorrect 1 ms 640 KB Output isn't correct
4 Incorrect 0 ms 640 KB Output isn't correct
5 Incorrect 1 ms 640 KB Output isn't correct
6 Correct 8 ms 640 KB Output is correct
7 Correct 11 ms 640 KB Output is correct
8 Correct 4 ms 640 KB Output is correct
9 Incorrect 1 ms 640 KB Output isn't correct
10 Incorrect 1 ms 640 KB Output isn't correct
11 Incorrect 4 ms 768 KB Output isn't correct
12 Incorrect 4 ms 768 KB Output isn't correct
13 Incorrect 4 ms 768 KB Output isn't correct
14 Incorrect 14 ms 896 KB Output isn't correct
15 Incorrect 10 ms 896 KB Output isn't correct
16 Incorrect 13 ms 896 KB Output isn't correct
17 Incorrect 4 ms 768 KB Output isn't correct
18 Incorrect 4 ms 768 KB Output isn't correct
19 Incorrect 13 ms 768 KB Output isn't correct
20 Incorrect 12 ms 768 KB Output isn't correct