oj.uz

Submission #45580

# Submission time Handle Problem Language Result Execution time Memory
45580 2018-04-15T13:45:05 Z qoo2p5 Port Facility (JOI17_port_facility) C++17
100 / 100
 3103 ms 379652 KB 
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

const int INF = (int) 1e9 + 1e6 + 123;
const ll LINF = (ll) 1e18 + 1e9 + 123;

#define rep(i, s, t) for (auto i = (s); i < (t); ++(i))
#define per(i, s, t) for (auto i = (s); i >= (t); --(i))
#define sz(x) ((int)(x).size())
#define mp make_pair
#define pb push_back
#define all(x) (x).begin(), (x).end()

bool mini(auto &x, const auto &y) {
    if (y < x) {
        x = y;
        return 1;
    }
    return 0;
}

bool maxi(auto &x, const auto &y) {
    if (y > x) {
        x = y;
        return 1;
    }
    return 0;
}

void run();

int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    run();
    return 0;
}

const int N = (int) 1e6 + 123;
const ll MOD = (ll) 1e9 + 7;

int n;
int a[N], b[N];
vector<int> adj[N], g[N];
int col[N];
int p[N];
int cnt[N];

void dfs(int v, int cc = 1) {
    col[v] = cc;
    for (int u : g[v]) {
        if (!col[u]) {
            dfs(u, 3 - cc);
        }
        if (col[u] != 3 - cc) {
            cout << "0\n";
            exit(0);
        }
    }
}

int get(int v) {
    return (p[v] == v ? v : (p[v] = get(p[v])));
}

void unite(int u, int v) {
    u = get(u);
    v = get(v);
    if (u != v) {
        p[u] = v;
        cnt[v] += cnt[u];
    }
}

bool closed[N];
pair<int, bool> what[2 * N];

int L[N], R[N];

void run() {
    rep(i, 0, N) p[i] = i, cnt[i] = 1;
    
    cin >> n;
    rep(i, 0, n) {
        cin >> a[i] >> b[i];
        a[i]--;
        b[i]--;
        what[a[i]] = {i, 0};
        what[b[i]] = {i, 1};
    }
    
    {
        set<int> q;
        rep(i, 0, 2 * n) {
            if (what[i].second) {
                continue;
            }
            int v = what[i].first;
            auto it = q.insert(b[v]).first;
            if (it != q.begin()) {
                --it;
                R[v] = *it;
            } else {
                R[v] = -1;
            }
        }
    }
    
    {
        set<int> q;
        per(i, 2 * n - 1, 0) {
            if (!what[i].second) {
                continue;
            }
            int v = what[i].first;
            auto it = q.insert(a[v]).first;
            ++it;
            if (it != q.end()) {
                L[v] = *it;
            } else {
                L[v] = INF;
            }
        }
    }
    
    rep(i, 0, n) {
        if (L[i] < R[i]) {
            cout << "0\n";
            return;
        }
    }
    
    vector<int> st, tmp;
    rep(i, 0, 2 * n) {
        int v = what[i].first;
        
        if (what[i].second) {
            while (1) {
                while (cnt[st.back()] == 0) {
                    st.pop_back();
                }
                int t = st.back();
                if (t == get(v)) {
                    break;
                }
                st.pop_back();
                if (cnt[t]) {
                    tmp.pb(t);
                }
            }
            
            if (sz(tmp)) {
                rep(i, 1, sz(tmp)) {
                    unite(tmp[0], tmp[i]);
                }
                int u = get(tmp[0]);
                adj[v].pb(u);
                adj[u].pb(v);
                st.pb(u);
                tmp.clear();
            }
            
            cnt[get(v)]--;
        } else {
            st.pb(v);
        }
    }
    
    rep(v, 0, n) {
        for (int u : adj[v]) {
            g[get(v)].pb(get(u));
        }
    }
    
    ll ans = 1;
    
    rep(i, 0, n) {
        if (get(i) == i && !col[i]) {
            dfs(i);
            ans = (ans * 2) % MOD;
        }
    }
    
    cout << ans << "\n";
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 46 ms 55160 KB Output is correct
2 Correct 45 ms 55268 KB Output is correct
3 Correct 44 ms 55268 KB Output is correct
4 Correct 47 ms 55268 KB Output is correct
5 Correct 46 ms 55392 KB Output is correct
6 Correct 47 ms 55392 KB Output is correct
7 Correct 44 ms 55392 KB Output is correct
8 Correct 44 ms 55420 KB Output is correct
9 Correct 46 ms 55420 KB Output is correct
10 Correct 45 ms 55420 KB Output is correct
11 Correct 44 ms 55420 KB Output is correct
12 Correct 44 ms 55420 KB Output is correct
13 Correct 58 ms 55420 KB Output is correct
14 Correct 46 ms 55548 KB Output is correct
15 Correct 54 ms 55548 KB Output is correct
16 Correct 46 ms 55548 KB Output is correct
17 Correct 45 ms 55548 KB Output is correct
18 Correct 55 ms 55548 KB Output is correct
19 Correct 46 ms 55548 KB Output is correct
20 Correct 55 ms 55548 KB Output is correct
21 Correct 46 ms 55548 KB Output is correct
22 Correct 53 ms 55548 KB Output is correct
23 Correct 46 ms 55548 KB Output is correct
24 Correct 49 ms 55548 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 46 ms 55160 KB Output is correct
2 Correct 45 ms 55268 KB Output is correct
3 Correct 44 ms 55268 KB Output is correct
4 Correct 47 ms 55268 KB Output is correct
5 Correct 46 ms 55392 KB Output is correct
6 Correct 47 ms 55392 KB Output is correct
7 Correct 44 ms 55392 KB Output is correct
8 Correct 44 ms 55420 KB Output is correct
9 Correct 46 ms 55420 KB Output is correct
10 Correct 45 ms 55420 KB Output is correct
11 Correct 44 ms 55420 KB Output is correct
12 Correct 44 ms 55420 KB Output is correct
13 Correct 58 ms 55420 KB Output is correct
14 Correct 46 ms 55548 KB Output is correct
15 Correct 54 ms 55548 KB Output is correct
16 Correct 46 ms 55548 KB Output is correct
17 Correct 45 ms 55548 KB Output is correct
18 Correct 55 ms 55548 KB Output is correct
19 Correct 46 ms 55548 KB Output is correct
20 Correct 55 ms 55548 KB Output is correct
21 Correct 46 ms 55548 KB Output is correct
22 Correct 53 ms 55548 KB Output is correct
23 Correct 46 ms 55548 KB Output is correct
24 Correct 49 ms 55548 KB Output is correct
25 Correct 47 ms 55548 KB Output is correct
26 Correct 50 ms 55548 KB Output is correct
27 Correct 56 ms 55584 KB Output is correct
28 Correct 48 ms 55584 KB Output is correct
29 Correct 53 ms 55584 KB Output is correct
30 Correct 47 ms 55584 KB Output is correct
31 Correct 48 ms 55652 KB Output is correct
32 Correct 46 ms 55652 KB Output is correct
33 Correct 48 ms 55652 KB Output is correct
34 Correct 49 ms 55676 KB Output is correct
35 Correct 47 ms 55676 KB Output is correct
36 Correct 46 ms 55676 KB Output is correct
37 Correct 53 ms 55676 KB Output is correct
38 Correct 45 ms 55676 KB Output is correct
39 Correct 50 ms 55676 KB Output is correct
40 Correct 47 ms 55676 KB Output is correct
41 Correct 47 ms 55676 KB Output is correct
42 Correct 48 ms 55676 KB Output is correct
43 Correct 47 ms 55804 KB Output is correct
44 Correct 47 ms 55804 KB Output is correct

Subtask #3
56.0 / 56.0

# Verdict Execution time Memory Grader output
1 Correct 46 ms 55160 KB Output is correct
2 Correct 45 ms 55268 KB Output is correct
3 Correct 44 ms 55268 KB Output is correct
4 Correct 47 ms 55268 KB Output is correct
5 Correct 46 ms 55392 KB Output is correct
6 Correct 47 ms 55392 KB Output is correct
7 Correct 44 ms 55392 KB Output is correct
8 Correct 44 ms 55420 KB Output is correct
9 Correct 46 ms 55420 KB Output is correct
10 Correct 45 ms 55420 KB Output is correct
11 Correct 44 ms 55420 KB Output is correct
12 Correct 44 ms 55420 KB Output is correct
13 Correct 58 ms 55420 KB Output is correct
14 Correct 46 ms 55548 KB Output is correct
15 Correct 54 ms 55548 KB Output is correct
16 Correct 46 ms 55548 KB Output is correct
17 Correct 45 ms 55548 KB Output is correct
18 Correct 55 ms 55548 KB Output is correct
19 Correct 46 ms 55548 KB Output is correct
20 Correct 55 ms 55548 KB Output is correct
21 Correct 46 ms 55548 KB Output is correct
22 Correct 53 ms 55548 KB Output is correct
23 Correct 46 ms 55548 KB Output is correct
24 Correct 49 ms 55548 KB Output is correct
25 Correct 47 ms 55548 KB Output is correct
26 Correct 50 ms 55548 KB Output is correct
27 Correct 56 ms 55584 KB Output is correct
28 Correct 48 ms 55584 KB Output is correct
29 Correct 53 ms 55584 KB Output is correct
30 Correct 47 ms 55584 KB Output is correct
31 Correct 48 ms 55652 KB Output is correct
32 Correct 46 ms 55652 KB Output is correct
33 Correct 48 ms 55652 KB Output is correct
34 Correct 49 ms 55676 KB Output is correct
35 Correct 47 ms 55676 KB Output is correct
36 Correct 46 ms 55676 KB Output is correct
37 Correct 53 ms 55676 KB Output is correct
38 Correct 45 ms 55676 KB Output is correct
39 Correct 50 ms 55676 KB Output is correct
40 Correct 47 ms 55676 KB Output is correct
41 Correct 47 ms 55676 KB Output is correct
42 Correct 48 ms 55676 KB Output is correct
43 Correct 47 ms 55804 KB Output is correct
44 Correct 47 ms 55804 KB Output is correct
45 Correct 164 ms 63228 KB Output is correct
46 Correct 161 ms 63288 KB Output is correct
47 Correct 180 ms 63288 KB Output is correct
48 Correct 174 ms 63288 KB Output is correct
49 Correct 174 ms 63288 KB Output is correct
50 Correct 142 ms 63288 KB Output is correct
51 Correct 127 ms 63372 KB Output is correct
52 Correct 131 ms 63372 KB Output is correct
53 Correct 134 ms 63372 KB Output is correct
54 Correct 130 ms 63372 KB Output is correct
55 Correct 131 ms 63372 KB Output is correct
56 Correct 134 ms 63372 KB Output is correct
57 Correct 170 ms 65884 KB Output is correct
58 Correct 130 ms 65884 KB Output is correct
59 Correct 144 ms 65884 KB Output is correct
60 Correct 219 ms 65884 KB Output is correct
61 Correct 170 ms 65884 KB Output is correct
62 Correct 129 ms 65884 KB Output is correct
63 Correct 131 ms 65884 KB Output is correct
64 Correct 130 ms 65884 KB Output is correct
65 Correct 169 ms 65884 KB Output is correct
66 Correct 186 ms 65884 KB Output is correct
67 Correct 186 ms 65884 KB Output is correct
68 Correct 169 ms 65884 KB Output is correct
69 Correct 153 ms 65884 KB Output is correct
70 Correct 186 ms 65884 KB Output is correct
71 Correct 183 ms 65884 KB Output is correct
72 Correct 148 ms 65884 KB Output is correct
73 Correct 142 ms 65884 KB Output is correct
74 Correct 164 ms 65884 KB Output is correct
75 Correct 226 ms 68604 KB Output is correct
76 Correct 215 ms 70396 KB Output is correct
77 Correct 205 ms 70524 KB Output is correct
78 Correct 178 ms 70524 KB Output is correct
79 Correct 167 ms 70524 KB Output is correct

Subtask #4
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 46 ms 55160 KB Output is correct
2 Correct 45 ms 55268 KB Output is correct
3 Correct 44 ms 55268 KB Output is correct
4 Correct 47 ms 55268 KB Output is correct
5 Correct 46 ms 55392 KB Output is correct
6 Correct 47 ms 55392 KB Output is correct
7 Correct 44 ms 55392 KB Output is correct
8 Correct 44 ms 55420 KB Output is correct
9 Correct 46 ms 55420 KB Output is correct
10 Correct 45 ms 55420 KB Output is correct
11 Correct 44 ms 55420 KB Output is correct
12 Correct 44 ms 55420 KB Output is correct
13 Correct 58 ms 55420 KB Output is correct
14 Correct 46 ms 55548 KB Output is correct
15 Correct 54 ms 55548 KB Output is correct
16 Correct 46 ms 55548 KB Output is correct
17 Correct 45 ms 55548 KB Output is correct
18 Correct 55 ms 55548 KB Output is correct
19 Correct 46 ms 55548 KB Output is correct
20 Correct 55 ms 55548 KB Output is correct
21 Correct 46 ms 55548 KB Output is correct
22 Correct 53 ms 55548 KB Output is correct
23 Correct 46 ms 55548 KB Output is correct
24 Correct 49 ms 55548 KB Output is correct
25 Correct 47 ms 55548 KB Output is correct
26 Correct 50 ms 55548 KB Output is correct
27 Correct 56 ms 55584 KB Output is correct
28 Correct 48 ms 55584 KB Output is correct
29 Correct 53 ms 55584 KB Output is correct
30 Correct 47 ms 55584 KB Output is correct
31 Correct 48 ms 55652 KB Output is correct
32 Correct 46 ms 55652 KB Output is correct
33 Correct 48 ms 55652 KB Output is correct
34 Correct 49 ms 55676 KB Output is correct
35 Correct 47 ms 55676 KB Output is correct
36 Correct 46 ms 55676 KB Output is correct
37 Correct 53 ms 55676 KB Output is correct
38 Correct 45 ms 55676 KB Output is correct
39 Correct 50 ms 55676 KB Output is correct
40 Correct 47 ms 55676 KB Output is correct
41 Correct 47 ms 55676 KB Output is correct
42 Correct 48 ms 55676 KB Output is correct
43 Correct 47 ms 55804 KB Output is correct
44 Correct 47 ms 55804 KB Output is correct
45 Correct 164 ms 63228 KB Output is correct
46 Correct 161 ms 63288 KB Output is correct
47 Correct 180 ms 63288 KB Output is correct
48 Correct 174 ms 63288 KB Output is correct
49 Correct 174 ms 63288 KB Output is correct
50 Correct 142 ms 63288 KB Output is correct
51 Correct 127 ms 63372 KB Output is correct
52 Correct 131 ms 63372 KB Output is correct
53 Correct 134 ms 63372 KB Output is correct
54 Correct 130 ms 63372 KB Output is correct
55 Correct 131 ms 63372 KB Output is correct
56 Correct 134 ms 63372 KB Output is correct
57 Correct 170 ms 65884 KB Output is correct
58 Correct 130 ms 65884 KB Output is correct
59 Correct 144 ms 65884 KB Output is correct
60 Correct 219 ms 65884 KB Output is correct
61 Correct 170 ms 65884 KB Output is correct
62 Correct 129 ms 65884 KB Output is correct
63 Correct 131 ms 65884 KB Output is correct
64 Correct 130 ms 65884 KB Output is correct
65 Correct 169 ms 65884 KB Output is correct
66 Correct 186 ms 65884 KB Output is correct
67 Correct 186 ms 65884 KB Output is correct
68 Correct 169 ms 65884 KB Output is correct
69 Correct 153 ms 65884 KB Output is correct
70 Correct 186 ms 65884 KB Output is correct
71 Correct 183 ms 65884 KB Output is correct
72 Correct 148 ms 65884 KB Output is correct
73 Correct 142 ms 65884 KB Output is correct
74 Correct 164 ms 65884 KB Output is correct
75 Correct 226 ms 68604 KB Output is correct
76 Correct 215 ms 70396 KB Output is correct
77 Correct 205 ms 70524 KB Output is correct
78 Correct 178 ms 70524 KB Output is correct
79 Correct 167 ms 70524 KB Output is correct
80 Correct 1971 ms 133760 KB Output is correct
81 Correct 2053 ms 133820 KB Output is correct
82 Correct 1967 ms 133968 KB Output is correct
83 Correct 2052 ms 133968 KB Output is correct
84 Correct 2007 ms 133968 KB Output is correct
85 Correct 1246 ms 133968 KB Output is correct
86 Correct 1339 ms 134024 KB Output is correct
87 Correct 1368 ms 134024 KB Output is correct
88 Correct 1433 ms 134024 KB Output is correct
89 Correct 1415 ms 134024 KB Output is correct
90 Correct 1371 ms 134024 KB Output is correct
91 Correct 1417 ms 134072 KB Output is correct
92 Correct 2009 ms 157512 KB Output is correct
93 Correct 1406 ms 157512 KB Output is correct
94 Correct 1586 ms 157512 KB Output is correct
95 Correct 1862 ms 157512 KB Output is correct
96 Correct 2164 ms 157512 KB Output is correct
97 Correct 1224 ms 157512 KB Output is correct
98 Correct 1216 ms 157512 KB Output is correct
99 Correct 1208 ms 157512 KB Output is correct
100 Correct 3006 ms 157512 KB Output is correct
101 Correct 3103 ms 157512 KB Output is correct
102 Correct 2106 ms 163040 KB Output is correct
103 Correct 1929 ms 177672 KB Output is correct
104 Correct 1778 ms 192240 KB Output is correct
105 Correct 1686 ms 206904 KB Output is correct
106 Correct 1815 ms 227280 KB Output is correct
107 Correct 1908 ms 241936 KB Output is correct
108 Correct 1738 ms 250464 KB Output is correct
109 Correct 1768 ms 265008 KB Output is correct
110 Correct 2514 ms 349548 KB Output is correct
111 Correct 2573 ms 364944 KB Output is correct
112 Correct 2441 ms 379652 KB Output is correct
113 Correct 2052 ms 379652 KB Output is correct
114 Correct 2064 ms 379652 KB Output is correct