oj.uz

Submission #95293

# Submission time Handle Problem Language Result Execution time Memory
95293 2019-01-29T18:52:03 Z dalgerok Port Facility (JOI17_port_facility) C++14
100 / 100
 2912 ms 131204 KB 
#include<bits/stdc++.h>
using namespace std;



const int N = 2e6 + 5, MOD = 1e9 + 7, INF = 1e9;



int n, cl[N], b[N], pos[N], t1[4 * N], t2[4 * N];
pair < int, int > a[N];


void build(int v, int l, int r){
    if(l == r){
        t1[v] = t2[v] = b[l];
        return;
    }
    int mid = (r + l) >> 1;
    build(v + v, l, mid);
    build(v + v + 1, mid + 1, r);
    t1[v] = max(t1[v + v], t1[v + v + 1]);
    t2[v] = min(t2[v + v], t2[v + v + 1]);
}
void del(int v, int l, int r, int pos){
    if(l == r){
        t1[v] = -INF;
        t2[v] = +INF;
        return;
    }
    int mid = (r + l) >> 1;
    if(pos <= mid){
        del(v + v, l, mid, pos);
    }
    else{
        del(v + v + 1, mid + 1, r, pos);
    }
    t1[v] = max(t1[v + v], t1[v + v + 1]);
    t2[v] = min(t2[v + v], t2[v + v + 1]);
}
int get_min(int v, int l, int r, int tl, int tr){
    if(l > r || l > tr || tl > r){
        return +INF;
    }
    if(tl <= l && r <= tr){
        return t2[v];
    }
    int mid = (r + l) >> 1;
    return min(get_min(v + v, l, mid, tl, tr), get_min(v + v + 1, mid + 1, r, tl, tr));
}
int get_max(int v, int l, int r, int tl, int tr){
    if(l > r || l > tr || tl > r){
        return -INF;
    }
    if(tl <= l && r <= tr){
        return t1[v];
    }
    int mid = (r + l) >> 1;
    return max(get_max(v + v, l, mid, tl, tr), get_max(v + v + 1, mid + 1, r, tl, tr));
}

void dfs(int v, int color = 0){
    cl[v] = color;
    del(1, 1, 2 * n, a[v].first);
    del(1, 1, 2 * n, a[v].second);
    while(true){
        int l = get_min(1, 1, 2 * n, a[v].first, a[v].second);
        if(l >= a[v].first){
            break;
        }
        int to = pos[l];
        if(cl[to] != -1){
            if(cl[to] != cl[v]){
                cout << 0;
                exit(0);
            }
        }
        dfs(to, (color ^ 1));
    }
    while(true){
        int r = get_max(1, 1, 2 * n, a[v].first, a[v].second);
        if(r <= a[v].second){
            break;
        }
        int to = pos[r];
        if(cl[to] != -1){
            if(cl[to] != cl[v]){
                cout << 0;
                exit(0);
            }
        }
        dfs(to, (color ^ 1));
    }
}

void check(){
    vector < int > q[2];
    for(int i = 1; i <= 2 * n; i++){
        int x = pos[i];
        if(i == a[x].first){
            q[cl[x]].push_back(x);
        }
        else{
            if(q[cl[x]].back() != x){
                cout << 0;
                exit(0);
            }
            q[cl[x]].pop_back();
        }
    }
}

int main(){
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    cin >> n;
    for(int i = 1; i <= n; i++){
        cin >> a[i].first >> a[i].second;
    }
    sort(a + 1, a + n + 1);
    for(int i = 1; i <= n; i++){
        int x = a[i].first, y = a[i].second;
        b[x] = y;
        b[y] = x;
        pos[x] = pos[y] = i;
    }
    build(1, 1, 2 * n);
    memset(cl, -1, sizeof(cl));
    int ans = 1;
    for(int i = 1; i <= n; i++){
        if(cl[i] == -1){
            dfs(i);
            ans += ans;
            if(ans >= MOD){
                ans -= MOD;
            }
        }
    }
    check();
    cout << ans;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 8212 KB Output is correct
2 Correct 7 ms 8184 KB Output is correct
3 Correct 7 ms 8184 KB Output is correct
4 Correct 2 ms 8184 KB Output is correct
5 Correct 7 ms 8184 KB Output is correct
6 Correct 7 ms 8232 KB Output is correct
7 Correct 7 ms 8184 KB Output is correct
8 Correct 7 ms 8184 KB Output is correct
9 Correct 7 ms 8184 KB Output is correct
10 Correct 7 ms 8188 KB Output is correct
11 Correct 8 ms 8184 KB Output is correct
12 Correct 7 ms 8184 KB Output is correct
13 Correct 8 ms 8184 KB Output is correct
14 Correct 8 ms 8312 KB Output is correct
15 Correct 9 ms 8184 KB Output is correct
16 Correct 8 ms 8184 KB Output is correct
17 Correct 8 ms 8184 KB Output is correct
18 Correct 8 ms 8184 KB Output is correct
19 Correct 8 ms 8184 KB Output is correct
20 Correct 8 ms 8184 KB Output is correct
21 Correct 8 ms 8184 KB Output is correct
22 Correct 8 ms 8184 KB Output is correct
23 Correct 8 ms 8184 KB Output is correct
24 Correct 9 ms 8184 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 8212 KB Output is correct
2 Correct 7 ms 8184 KB Output is correct
3 Correct 7 ms 8184 KB Output is correct
4 Correct 2 ms 8184 KB Output is correct
5 Correct 7 ms 8184 KB Output is correct
6 Correct 7 ms 8232 KB Output is correct
7 Correct 7 ms 8184 KB Output is correct
8 Correct 7 ms 8184 KB Output is correct
9 Correct 7 ms 8184 KB Output is correct
10 Correct 7 ms 8188 KB Output is correct
11 Correct 8 ms 8184 KB Output is correct
12 Correct 7 ms 8184 KB Output is correct
13 Correct 8 ms 8184 KB Output is correct
14 Correct 8 ms 8312 KB Output is correct
15 Correct 9 ms 8184 KB Output is correct
16 Correct 8 ms 8184 KB Output is correct
17 Correct 8 ms 8184 KB Output is correct
18 Correct 8 ms 8184 KB Output is correct
19 Correct 8 ms 8184 KB Output is correct
20 Correct 8 ms 8184 KB Output is correct
21 Correct 8 ms 8184 KB Output is correct
22 Correct 8 ms 8184 KB Output is correct
23 Correct 8 ms 8184 KB Output is correct
24 Correct 9 ms 8184 KB Output is correct
25 Correct 9 ms 8312 KB Output is correct
26 Correct 10 ms 8424 KB Output is correct
27 Correct 10 ms 8440 KB Output is correct
28 Correct 10 ms 8312 KB Output is correct
29 Correct 10 ms 8312 KB Output is correct
30 Correct 10 ms 8368 KB Output is correct
31 Correct 10 ms 8440 KB Output is correct
32 Correct 10 ms 8440 KB Output is correct
33 Correct 10 ms 8312 KB Output is correct
34 Correct 10 ms 8440 KB Output is correct
35 Correct 9 ms 8312 KB Output is correct
36 Correct 9 ms 8316 KB Output is correct
37 Correct 10 ms 8440 KB Output is correct
38 Correct 10 ms 8440 KB Output is correct
39 Correct 9 ms 8312 KB Output is correct
40 Correct 9 ms 8312 KB Output is correct
41 Correct 10 ms 8440 KB Output is correct
42 Correct 10 ms 8440 KB Output is correct
43 Correct 10 ms 8444 KB Output is correct
44 Correct 9 ms 8440 KB Output is correct

Subtask #3
56.0 / 56.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 8212 KB Output is correct
2 Correct 7 ms 8184 KB Output is correct
3 Correct 7 ms 8184 KB Output is correct
4 Correct 2 ms 8184 KB Output is correct
5 Correct 7 ms 8184 KB Output is correct
6 Correct 7 ms 8232 KB Output is correct
7 Correct 7 ms 8184 KB Output is correct
8 Correct 7 ms 8184 KB Output is correct
9 Correct 7 ms 8184 KB Output is correct
10 Correct 7 ms 8188 KB Output is correct
11 Correct 8 ms 8184 KB Output is correct
12 Correct 7 ms 8184 KB Output is correct
13 Correct 8 ms 8184 KB Output is correct
14 Correct 8 ms 8312 KB Output is correct
15 Correct 9 ms 8184 KB Output is correct
16 Correct 8 ms 8184 KB Output is correct
17 Correct 8 ms 8184 KB Output is correct
18 Correct 8 ms 8184 KB Output is correct
19 Correct 8 ms 8184 KB Output is correct
20 Correct 8 ms 8184 KB Output is correct
21 Correct 8 ms 8184 KB Output is correct
22 Correct 8 ms 8184 KB Output is correct
23 Correct 8 ms 8184 KB Output is correct
24 Correct 9 ms 8184 KB Output is correct
25 Correct 9 ms 8312 KB Output is correct
26 Correct 10 ms 8424 KB Output is correct
27 Correct 10 ms 8440 KB Output is correct
28 Correct 10 ms 8312 KB Output is correct
29 Correct 10 ms 8312 KB Output is correct
30 Correct 10 ms 8368 KB Output is correct
31 Correct 10 ms 8440 KB Output is correct
32 Correct 10 ms 8440 KB Output is correct
33 Correct 10 ms 8312 KB Output is correct
34 Correct 10 ms 8440 KB Output is correct
35 Correct 9 ms 8312 KB Output is correct
36 Correct 9 ms 8316 KB Output is correct
37 Correct 10 ms 8440 KB Output is correct
38 Correct 10 ms 8440 KB Output is correct
39 Correct 9 ms 8312 KB Output is correct
40 Correct 9 ms 8312 KB Output is correct
41 Correct 10 ms 8440 KB Output is correct
42 Correct 10 ms 8440 KB Output is correct
43 Correct 10 ms 8444 KB Output is correct
44 Correct 9 ms 8440 KB Output is correct
45 Correct 135 ms 17016 KB Output is correct
46 Correct 134 ms 17528 KB Output is correct
47 Correct 129 ms 16476 KB Output is correct
48 Correct 137 ms 17500 KB Output is correct
49 Correct 134 ms 16632 KB Output is correct
50 Correct 149 ms 17400 KB Output is correct
51 Correct 136 ms 17400 KB Output is correct
52 Correct 95 ms 16012 KB Output is correct
53 Correct 110 ms 16624 KB Output is correct
54 Correct 148 ms 21260 KB Output is correct
55 Correct 142 ms 18632 KB Output is correct
56 Correct 147 ms 18552 KB Output is correct
57 Correct 101 ms 15884 KB Output is correct
58 Correct 98 ms 15976 KB Output is correct
59 Correct 110 ms 16248 KB Output is correct
60 Correct 121 ms 16232 KB Output is correct
61 Correct 129 ms 16220 KB Output is correct
62 Correct 113 ms 16348 KB Output is correct
63 Correct 120 ms 15976 KB Output is correct
64 Correct 123 ms 15880 KB Output is correct
65 Correct 204 ms 20924 KB Output is correct
66 Correct 225 ms 20956 KB Output is correct
67 Correct 147 ms 18808 KB Output is correct
68 Correct 147 ms 18828 KB Output is correct
69 Correct 145 ms 18952 KB Output is correct
70 Correct 146 ms 18932 KB Output is correct
71 Correct 150 ms 21196 KB Output is correct
72 Correct 153 ms 21184 KB Output is correct
73 Correct 147 ms 19956 KB Output is correct
74 Correct 142 ms 19900 KB Output is correct
75 Correct 118 ms 20600 KB Output is correct
76 Correct 119 ms 20640 KB Output is correct
77 Correct 117 ms 20620 KB Output is correct
78 Correct 136 ms 17400 KB Output is correct
79 Correct 131 ms 17016 KB Output is correct

Subtask #4
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 8212 KB Output is correct
2 Correct 7 ms 8184 KB Output is correct
3 Correct 7 ms 8184 KB Output is correct
4 Correct 2 ms 8184 KB Output is correct
5 Correct 7 ms 8184 KB Output is correct
6 Correct 7 ms 8232 KB Output is correct
7 Correct 7 ms 8184 KB Output is correct
8 Correct 7 ms 8184 KB Output is correct
9 Correct 7 ms 8184 KB Output is correct
10 Correct 7 ms 8188 KB Output is correct
11 Correct 8 ms 8184 KB Output is correct
12 Correct 7 ms 8184 KB Output is correct
13 Correct 8 ms 8184 KB Output is correct
14 Correct 8 ms 8312 KB Output is correct
15 Correct 9 ms 8184 KB Output is correct
16 Correct 8 ms 8184 KB Output is correct
17 Correct 8 ms 8184 KB Output is correct
18 Correct 8 ms 8184 KB Output is correct
19 Correct 8 ms 8184 KB Output is correct
20 Correct 8 ms 8184 KB Output is correct
21 Correct 8 ms 8184 KB Output is correct
22 Correct 8 ms 8184 KB Output is correct
23 Correct 8 ms 8184 KB Output is correct
24 Correct 9 ms 8184 KB Output is correct
25 Correct 9 ms 8312 KB Output is correct
26 Correct 10 ms 8424 KB Output is correct
27 Correct 10 ms 8440 KB Output is correct
28 Correct 10 ms 8312 KB Output is correct
29 Correct 10 ms 8312 KB Output is correct
30 Correct 10 ms 8368 KB Output is correct
31 Correct 10 ms 8440 KB Output is correct
32 Correct 10 ms 8440 KB Output is correct
33 Correct 10 ms 8312 KB Output is correct
34 Correct 10 ms 8440 KB Output is correct
35 Correct 9 ms 8312 KB Output is correct
36 Correct 9 ms 8316 KB Output is correct
37 Correct 10 ms 8440 KB Output is correct
38 Correct 10 ms 8440 KB Output is correct
39 Correct 9 ms 8312 KB Output is correct
40 Correct 9 ms 8312 KB Output is correct
41 Correct 10 ms 8440 KB Output is correct
42 Correct 10 ms 8440 KB Output is correct
43 Correct 10 ms 8444 KB Output is correct
44 Correct 9 ms 8440 KB Output is correct
45 Correct 135 ms 17016 KB Output is correct
46 Correct 134 ms 17528 KB Output is correct
47 Correct 129 ms 16476 KB Output is correct
48 Correct 137 ms 17500 KB Output is correct
49 Correct 134 ms 16632 KB Output is correct
50 Correct 149 ms 17400 KB Output is correct
51 Correct 136 ms 17400 KB Output is correct
52 Correct 95 ms 16012 KB Output is correct
53 Correct 110 ms 16624 KB Output is correct
54 Correct 148 ms 21260 KB Output is correct
55 Correct 142 ms 18632 KB Output is correct
56 Correct 147 ms 18552 KB Output is correct
57 Correct 101 ms 15884 KB Output is correct
58 Correct 98 ms 15976 KB Output is correct
59 Correct 110 ms 16248 KB Output is correct
60 Correct 121 ms 16232 KB Output is correct
61 Correct 129 ms 16220 KB Output is correct
62 Correct 113 ms 16348 KB Output is correct
63 Correct 120 ms 15976 KB Output is correct
64 Correct 123 ms 15880 KB Output is correct
65 Correct 204 ms 20924 KB Output is correct
66 Correct 225 ms 20956 KB Output is correct
67 Correct 147 ms 18808 KB Output is correct
68 Correct 147 ms 18828 KB Output is correct
69 Correct 145 ms 18952 KB Output is correct
70 Correct 146 ms 18932 KB Output is correct
71 Correct 150 ms 21196 KB Output is correct
72 Correct 153 ms 21184 KB Output is correct
73 Correct 147 ms 19956 KB Output is correct
74 Correct 142 ms 19900 KB Output is correct
75 Correct 118 ms 20600 KB Output is correct
76 Correct 119 ms 20640 KB Output is correct
77 Correct 117 ms 20620 KB Output is correct
78 Correct 136 ms 17400 KB Output is correct
79 Correct 131 ms 17016 KB Output is correct
80 Correct 1433 ms 84068 KB Output is correct
81 Correct 1429 ms 83572 KB Output is correct
82 Correct 1399 ms 82076 KB Output is correct
83 Correct 1423 ms 83792 KB Output is correct
84 Correct 1439 ms 84196 KB Output is correct
85 Correct 1363 ms 82276 KB Output is correct
86 Correct 1404 ms 83156 KB Output is correct
87 Correct 939 ms 79140 KB Output is correct
88 Correct 1166 ms 83344 KB Output is correct
89 Correct 1550 ms 131036 KB Output is correct
90 Correct 1614 ms 105276 KB Output is correct
91 Correct 1531 ms 105156 KB Output is correct
92 Correct 1031 ms 79096 KB Output is correct
93 Correct 952 ms 79096 KB Output is correct
94 Correct 1127 ms 81028 KB Output is correct
95 Correct 1251 ms 80904 KB Output is correct
96 Correct 1325 ms 81040 KB Output is correct
97 Correct 1190 ms 81004 KB Output is correct
98 Correct 1281 ms 80220 KB Output is correct
99 Correct 1344 ms 81096 KB Output is correct
100 Correct 2912 ms 128216 KB Output is correct
101 Correct 2785 ms 128352 KB Output is correct
102 Correct 1650 ms 107752 KB Output is correct
103 Correct 1557 ms 107700 KB Output is correct
104 Correct 1557 ms 105520 KB Output is correct
105 Correct 1490 ms 105660 KB Output is correct
106 Correct 1573 ms 131168 KB Output is correct
107 Correct 1589 ms 131204 KB Output is correct
108 Correct 1463 ms 115928 KB Output is correct
109 Correct 1462 ms 116128 KB Output is correct
110 Correct 1130 ms 126300 KB Output is correct
111 Correct 1177 ms 126296 KB Output is correct
112 Correct 1152 ms 126196 KB Output is correct
113 Correct 1331 ms 81640 KB Output is correct
114 Correct 1365 ms 83532 KB Output is correct