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Submission #799298

# Submission time Handle Problem Language Result Execution time Memory
799298 2023-07-31T12:11:32 Z vjudge1 Port Facility (JOI17_port_facility) C++17
100 / 100
 2083 ms 142036 KB 
#include<bits/stdc++.h>

using namespace std;
using ll = long long;

const int MOD = 1e9 + 7;
const int INF = 1e9;
const int M = (1 << 21);

int n;
vector<int>  mn_ver;
vector<int>  mx_ver;
vector<pair<int, int>> segs;

int mn(int x, int y) {
    return (segs[x].first < segs[y].first ? x : y);
}
int mx(int x, int y) {
    return (segs[x].second > segs[y].second ? x : y);
}

void add(int ver) {
    int pos = segs[ver].second;
    for(pos += M, mn_ver[pos] = ver; pos > 1; pos >>= 1) 
        mn_ver[pos >> 1] = mn(mn_ver[pos], mn_ver[pos ^ 1]); 
    pos = segs[ver].first;
    for(pos += M, mx_ver[pos] = ver; pos > 1; pos >>= 1) 
        mx_ver[pos >> 1] = mx(mx_ver[pos], mx_ver[pos ^ 1]); 
}
void del(int ver) {
    int pos = segs[ver].second;
    for(pos += M, mn_ver[pos] = n; pos > 1; pos >>= 1) 
        mn_ver[pos >> 1] = mn(mn_ver[pos], mn_ver[pos ^ 1]); 
    pos = segs[ver].first;
    for(pos += M, mx_ver[pos] = n; pos > 1; pos >>= 1) 
        mx_ver[pos >> 1] = mx(mx_ver[pos], mx_ver[pos ^ 1]); 
}

int get1(int i) {
    int ql = segs[i].first + 1, qr = segs[i].second - 1;
    int res_ver = n;
    for(ql += M, qr += M + 1; ql < qr; ql >>= 1, qr >>= 1) {
        if(ql & 1) {
            res_ver = mn(res_ver, mn_ver[ql++]);
        }
        if(qr & 1) {
            res_ver = mn(res_ver, mn_ver[--qr]);
        }
    }
    return res_ver;
}
int get2(int i) {
    int ql = segs[i].first + 1, qr = segs[i].second - 1;
    int res_ver = n;
    for(ql += M, qr += M + 1; ql < qr; ql >>= 1, qr >>= 1) {
        if(ql & 1) {
            res_ver = mx(res_ver, mx_ver[ql++]);
        }
        if(qr & 1) {
            res_ver = mx(res_ver, mx_ver[--qr]);
        }
    }
    return res_ver;
}

int cl[M];

void dfs(int cur, int color) {
    cl[cur] = color;
    del(cur);
    int next = get1(cur);
    while(segs[next].first < segs[cur].first) {
        dfs(next, 3 - color);
        next = get1(cur);
    }
    
    next = get2(cur);
    while(segs[next].second > segs[cur].second) {
        dfs(next, 3 - color);
        next = get2(cur);
    }
}

int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);cout.tie(0);
    cin >> n;
    mn_ver.assign(2 * M, n);
    mx_ver.assign(2 * M, n);
    segs.resize(n + 1);
    segs[n] = {INF, -INF};

    for(int i = 0; i < n; i++) {
        cin >> segs[i].first >> segs[i].second;
        add(i);
    }

    int ans = 1;
    for(int i = 0; i < n; i++) {
        if(cl[i]) continue;
        dfs(i, 1);
        ans = (ans * 2) % MOD;
    }
    vector<int> t[2];
    for(int i = 0; i < n; i++) {
        t[cl[i] - 1].push_back(i);
    }
    sort(t[0].begin(), t[0].end(), [&](int x, int y) {
        if(segs[x].second != segs[y].second) return segs[x].second < segs[y].second;
        return segs[x].first > segs[y].first;
    });
    sort(t[1].begin(), t[1].end(), [&](int x, int y) {
        if(segs[x].second != segs[y].second) return segs[x].second < segs[y].second;
        return segs[x].first > segs[y].first;
    });
    
    for(int c : t[0]) {
        add(c);
        int v = get1(c);
        if(segs[v].first < segs[c].first) {
            cout << 0;
            return 0;
        }
    }
    for(int c : t[0]) del(c);
    for(int c : t[1]) {
        add(c);
        int v = get1(c);
        if(segs[v].first < segs[c].first) {
            cout << 0;
            return 0;
        }
    }
    cout << ans;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 33108 KB Output is correct
2 Correct 14 ms 33080 KB Output is correct
3 Correct 14 ms 33140 KB Output is correct
4 Correct 14 ms 33100 KB Output is correct
5 Correct 14 ms 33160 KB Output is correct
6 Correct 15 ms 33096 KB Output is correct
7 Correct 16 ms 33060 KB Output is correct
8 Correct 15 ms 33108 KB Output is correct
9 Correct 15 ms 33096 KB Output is correct
10 Correct 14 ms 33112 KB Output is correct
11 Correct 14 ms 33128 KB Output is correct
12 Correct 14 ms 33148 KB Output is correct
13 Correct 14 ms 33084 KB Output is correct
14 Correct 14 ms 33108 KB Output is correct
15 Correct 14 ms 33108 KB Output is correct
16 Correct 15 ms 33132 KB Output is correct
17 Correct 15 ms 33108 KB Output is correct
18 Correct 14 ms 33064 KB Output is correct
19 Correct 14 ms 33148 KB Output is correct
20 Correct 14 ms 33092 KB Output is correct
21 Correct 15 ms 33108 KB Output is correct
22 Correct 14 ms 33096 KB Output is correct
23 Correct 14 ms 33148 KB Output is correct
24 Correct 14 ms 33116 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 33108 KB Output is correct
2 Correct 14 ms 33080 KB Output is correct
3 Correct 14 ms 33140 KB Output is correct
4 Correct 14 ms 33100 KB Output is correct
5 Correct 14 ms 33160 KB Output is correct
6 Correct 15 ms 33096 KB Output is correct
7 Correct 16 ms 33060 KB Output is correct
8 Correct 15 ms 33108 KB Output is correct
9 Correct 15 ms 33096 KB Output is correct
10 Correct 14 ms 33112 KB Output is correct
11 Correct 14 ms 33128 KB Output is correct
12 Correct 14 ms 33148 KB Output is correct
13 Correct 14 ms 33084 KB Output is correct
14 Correct 14 ms 33108 KB Output is correct
15 Correct 14 ms 33108 KB Output is correct
16 Correct 15 ms 33132 KB Output is correct
17 Correct 15 ms 33108 KB Output is correct
18 Correct 14 ms 33064 KB Output is correct
19 Correct 14 ms 33148 KB Output is correct
20 Correct 14 ms 33092 KB Output is correct
21 Correct 15 ms 33108 KB Output is correct
22 Correct 14 ms 33096 KB Output is correct
23 Correct 14 ms 33148 KB Output is correct
24 Correct 14 ms 33116 KB Output is correct
25 Correct 15 ms 33212 KB Output is correct
26 Correct 15 ms 33328 KB Output is correct
27 Correct 15 ms 33236 KB Output is correct
28 Correct 17 ms 33216 KB Output is correct
29 Correct 15 ms 33236 KB Output is correct
30 Correct 15 ms 33236 KB Output is correct
31 Correct 16 ms 33240 KB Output is correct
32 Correct 17 ms 33236 KB Output is correct
33 Correct 15 ms 33280 KB Output is correct
34 Correct 16 ms 33204 KB Output is correct
35 Correct 15 ms 33160 KB Output is correct
36 Correct 15 ms 33236 KB Output is correct
37 Correct 15 ms 33376 KB Output is correct
38 Correct 14 ms 33256 KB Output is correct
39 Correct 15 ms 33232 KB Output is correct
40 Correct 15 ms 33108 KB Output is correct
41 Correct 16 ms 33364 KB Output is correct
42 Correct 15 ms 33364 KB Output is correct
43 Correct 15 ms 33280 KB Output is correct
44 Correct 15 ms 33364 KB Output is correct

Subtask #3
56.0 / 56.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 33108 KB Output is correct
2 Correct 14 ms 33080 KB Output is correct
3 Correct 14 ms 33140 KB Output is correct
4 Correct 14 ms 33100 KB Output is correct
5 Correct 14 ms 33160 KB Output is correct
6 Correct 15 ms 33096 KB Output is correct
7 Correct 16 ms 33060 KB Output is correct
8 Correct 15 ms 33108 KB Output is correct
9 Correct 15 ms 33096 KB Output is correct
10 Correct 14 ms 33112 KB Output is correct
11 Correct 14 ms 33128 KB Output is correct
12 Correct 14 ms 33148 KB Output is correct
13 Correct 14 ms 33084 KB Output is correct
14 Correct 14 ms 33108 KB Output is correct
15 Correct 14 ms 33108 KB Output is correct
16 Correct 15 ms 33132 KB Output is correct
17 Correct 15 ms 33108 KB Output is correct
18 Correct 14 ms 33064 KB Output is correct
19 Correct 14 ms 33148 KB Output is correct
20 Correct 14 ms 33092 KB Output is correct
21 Correct 15 ms 33108 KB Output is correct
22 Correct 14 ms 33096 KB Output is correct
23 Correct 14 ms 33148 KB Output is correct
24 Correct 14 ms 33116 KB Output is correct
25 Correct 15 ms 33212 KB Output is correct
26 Correct 15 ms 33328 KB Output is correct
27 Correct 15 ms 33236 KB Output is correct
28 Correct 17 ms 33216 KB Output is correct
29 Correct 15 ms 33236 KB Output is correct
30 Correct 15 ms 33236 KB Output is correct
31 Correct 16 ms 33240 KB Output is correct
32 Correct 17 ms 33236 KB Output is correct
33 Correct 15 ms 33280 KB Output is correct
34 Correct 16 ms 33204 KB Output is correct
35 Correct 15 ms 33160 KB Output is correct
36 Correct 15 ms 33236 KB Output is correct
37 Correct 15 ms 33376 KB Output is correct
38 Correct 14 ms 33256 KB Output is correct
39 Correct 15 ms 33232 KB Output is correct
40 Correct 15 ms 33108 KB Output is correct
41 Correct 16 ms 33364 KB Output is correct
42 Correct 15 ms 33364 KB Output is correct
43 Correct 15 ms 33280 KB Output is correct
44 Correct 15 ms 33364 KB Output is correct
45 Correct 102 ms 37252 KB Output is correct
46 Correct 103 ms 38560 KB Output is correct
47 Correct 98 ms 36512 KB Output is correct
48 Correct 116 ms 38308 KB Output is correct
49 Correct 106 ms 36808 KB Output is correct
50 Correct 86 ms 38072 KB Output is correct
51 Correct 85 ms 37908 KB Output is correct
52 Correct 82 ms 36188 KB Output is correct
53 Correct 104 ms 36148 KB Output is correct
54 Correct 89 ms 43968 KB Output is correct
55 Correct 85 ms 40012 KB Output is correct
56 Correct 86 ms 39964 KB Output is correct
57 Correct 86 ms 36172 KB Output is correct
58 Correct 84 ms 36176 KB Output is correct
59 Correct 99 ms 36248 KB Output is correct
60 Correct 97 ms 36260 KB Output is correct
61 Correct 97 ms 36120 KB Output is correct
62 Correct 77 ms 36368 KB Output is correct
63 Correct 83 ms 36308 KB Output is correct
64 Correct 83 ms 36112 KB Output is correct
65 Correct 103 ms 43972 KB Output is correct
66 Correct 103 ms 43860 KB Output is correct
67 Correct 113 ms 40004 KB Output is correct
68 Correct 110 ms 39968 KB Output is correct
69 Correct 115 ms 39832 KB Output is correct
70 Correct 111 ms 39828 KB Output is correct
71 Correct 110 ms 43844 KB Output is correct
72 Correct 109 ms 43832 KB Output is correct
73 Correct 107 ms 41496 KB Output is correct
74 Correct 112 ms 41416 KB Output is correct
75 Correct 78 ms 40852 KB Output is correct
76 Correct 79 ms 43920 KB Output is correct
77 Correct 66 ms 43948 KB Output is correct
78 Correct 107 ms 38164 KB Output is correct
79 Correct 99 ms 37368 KB Output is correct

Subtask #4
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 33108 KB Output is correct
2 Correct 14 ms 33080 KB Output is correct
3 Correct 14 ms 33140 KB Output is correct
4 Correct 14 ms 33100 KB Output is correct
5 Correct 14 ms 33160 KB Output is correct
6 Correct 15 ms 33096 KB Output is correct
7 Correct 16 ms 33060 KB Output is correct
8 Correct 15 ms 33108 KB Output is correct
9 Correct 15 ms 33096 KB Output is correct
10 Correct 14 ms 33112 KB Output is correct
11 Correct 14 ms 33128 KB Output is correct
12 Correct 14 ms 33148 KB Output is correct
13 Correct 14 ms 33084 KB Output is correct
14 Correct 14 ms 33108 KB Output is correct
15 Correct 14 ms 33108 KB Output is correct
16 Correct 15 ms 33132 KB Output is correct
17 Correct 15 ms 33108 KB Output is correct
18 Correct 14 ms 33064 KB Output is correct
19 Correct 14 ms 33148 KB Output is correct
20 Correct 14 ms 33092 KB Output is correct
21 Correct 15 ms 33108 KB Output is correct
22 Correct 14 ms 33096 KB Output is correct
23 Correct 14 ms 33148 KB Output is correct
24 Correct 14 ms 33116 KB Output is correct
25 Correct 15 ms 33212 KB Output is correct
26 Correct 15 ms 33328 KB Output is correct
27 Correct 15 ms 33236 KB Output is correct
28 Correct 17 ms 33216 KB Output is correct
29 Correct 15 ms 33236 KB Output is correct
30 Correct 15 ms 33236 KB Output is correct
31 Correct 16 ms 33240 KB Output is correct
32 Correct 17 ms 33236 KB Output is correct
33 Correct 15 ms 33280 KB Output is correct
34 Correct 16 ms 33204 KB Output is correct
35 Correct 15 ms 33160 KB Output is correct
36 Correct 15 ms 33236 KB Output is correct
37 Correct 15 ms 33376 KB Output is correct
38 Correct 14 ms 33256 KB Output is correct
39 Correct 15 ms 33232 KB Output is correct
40 Correct 15 ms 33108 KB Output is correct
41 Correct 16 ms 33364 KB Output is correct
42 Correct 15 ms 33364 KB Output is correct
43 Correct 15 ms 33280 KB Output is correct
44 Correct 15 ms 33364 KB Output is correct
45 Correct 102 ms 37252 KB Output is correct
46 Correct 103 ms 38560 KB Output is correct
47 Correct 98 ms 36512 KB Output is correct
48 Correct 116 ms 38308 KB Output is correct
49 Correct 106 ms 36808 KB Output is correct
50 Correct 86 ms 38072 KB Output is correct
51 Correct 85 ms 37908 KB Output is correct
52 Correct 82 ms 36188 KB Output is correct
53 Correct 104 ms 36148 KB Output is correct
54 Correct 89 ms 43968 KB Output is correct
55 Correct 85 ms 40012 KB Output is correct
56 Correct 86 ms 39964 KB Output is correct
57 Correct 86 ms 36172 KB Output is correct
58 Correct 84 ms 36176 KB Output is correct
59 Correct 99 ms 36248 KB Output is correct
60 Correct 97 ms 36260 KB Output is correct
61 Correct 97 ms 36120 KB Output is correct
62 Correct 77 ms 36368 KB Output is correct
63 Correct 83 ms 36308 KB Output is correct
64 Correct 83 ms 36112 KB Output is correct
65 Correct 103 ms 43972 KB Output is correct
66 Correct 103 ms 43860 KB Output is correct
67 Correct 113 ms 40004 KB Output is correct
68 Correct 110 ms 39968 KB Output is correct
69 Correct 115 ms 39832 KB Output is correct
70 Correct 111 ms 39828 KB Output is correct
71 Correct 110 ms 43844 KB Output is correct
72 Correct 109 ms 43832 KB Output is correct
73 Correct 107 ms 41496 KB Output is correct
74 Correct 112 ms 41416 KB Output is correct
75 Correct 78 ms 40852 KB Output is correct
76 Correct 79 ms 43920 KB Output is correct
77 Correct 66 ms 43948 KB Output is correct
78 Correct 107 ms 38164 KB Output is correct
79 Correct 99 ms 37368 KB Output is correct
80 Correct 1452 ms 69928 KB Output is correct
81 Correct 1399 ms 69016 KB Output is correct
82 Correct 1375 ms 65776 KB Output is correct
83 Correct 1391 ms 69124 KB Output is correct
84 Correct 1423 ms 69904 KB Output is correct
85 Correct 1145 ms 66316 KB Output is correct
86 Correct 1284 ms 69240 KB Output is correct
87 Correct 1321 ms 63748 KB Output is correct
88 Correct 1755 ms 63748 KB Output is correct
89 Correct 1124 ms 141740 KB Output is correct
90 Correct 1119 ms 102668 KB Output is correct
91 Correct 1083 ms 102752 KB Output is correct
92 Correct 1197 ms 64284 KB Output is correct
93 Correct 1311 ms 63796 KB Output is correct
94 Correct 1545 ms 64392 KB Output is correct
95 Correct 1431 ms 64756 KB Output is correct
96 Correct 1359 ms 65028 KB Output is correct
97 Correct 1264 ms 64440 KB Output is correct
98 Correct 1225 ms 66624 KB Output is correct
99 Correct 1229 ms 64984 KB Output is correct
100 Correct 1941 ms 141812 KB Output is correct
101 Correct 2083 ms 141900 KB Output is correct
102 Correct 1564 ms 102712 KB Output is correct
103 Correct 1503 ms 102536 KB Output is correct
104 Correct 1475 ms 99460 KB Output is correct
105 Correct 1471 ms 100288 KB Output is correct
106 Correct 1496 ms 142016 KB Output is correct
107 Correct 1427 ms 141772 KB Output is correct
108 Correct 1392 ms 116852 KB Output is correct
109 Correct 1382 ms 117012 KB Output is correct
110 Correct 1221 ms 140264 KB Output is correct
111 Correct 1166 ms 141820 KB Output is correct
112 Correct 1004 ms 142036 KB Output is correct
113 Correct 1510 ms 65804 KB Output is correct
114 Correct 1429 ms 68868 KB Output is correct