oj.uz

Submission #999562

# Submission time Handle Problem Language Result Execution time Memory
999562 2024-06-15T19:48:22 Z Tob Port Facility (JOI17_port_facility) C++14
100 / 100
 1518 ms 243472 KB 
#include <bits/stdc++.h>

#pragma gcc("O3, unroll-loops")

#define F first
#define S second
#define all(x) x.begin(), x.end()
#define pb push_back
#define FIO ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0)

using namespace std;

typedef long long ll;
typedef pair <int, int> pii;

const int N = 1e6 + 7, ofs = (1 << 21), mod = 1e9 + 7;

int n, E;
int l[N], r[N], par[N], siz[N], bio[N], col[N];
pii t[2*ofs];
vector <int> no[N], adj[N];

void add(int x, int y) {
	x += ofs;
	t[x] = {y, y};
	while (x /= 2) t[x] = {max(t[2*x].F, t[2*x+1].F), min(t[2*x].S, t[2*x+1].S)};
}
pii get(int x, int a, int b, int lo = 0, int hi = ofs-1) {
	if (b < lo || hi < a) return {-1, n};
	if (a <= lo && hi <= b) return t[x];
	int mid = (lo + hi) / 2;
	pii p1 = get(2*x, a, b, lo, mid), p2 = get(2*x+1, a, b, mid+1, hi);
	return {max(p1.F, p2.F), min(p1.S, p2.S)};
}

int find(int x) {return (x == par[x]) ? x : (par[x] = find(par[x]));}
void unite(int x, int y) {
	x = find(x); y = find(y);
	if (x == y) return;
	if (siz[x] < siz[y]) swap(x, y);
	siz[x] += siz[y];
	par[y] = x;
	for (auto z : no[y]) {
		add(r[z], x);
		no[x].pb(z);
	}
}

void dfs(int x) {
	bio[x] = 1;
	for (auto y : adj[x]) {
		if (bio[y]) {
			if (col[x] == col[y]) E = 1;
			continue;
		}
		col[y] = col[x] ^ 1;
		dfs(y);
	}
}

int madd(int x, int y) {return (x+y < mod) ? (x+y) : (x+y-mod);}
int mul(int x, int y) {return (ll)x*y%mod;}

int main () {
	FIO;
	cin >> n;
	for (int i = 0; i < 2*ofs; i++) t[i] = {-1, n};
	
	vector <pii> v;
	
	for (int i = 0; i < n; i++) {
		cin >> l[i] >> r[i]; l[i]--; r[i]--;
		par[i] = i;
		siz[i] = 1;
		v.pb({l[i], i});
		no[i] = {i};
	}
	sort(all(v));
	
	vector <pii> ed;
	
	for (int i = 0; i < n; i++) {
		int x = v[i].S;
		pii o = get(1, l[x], r[x]);
		if (o.F != -1 && o.F != o.S) {
			while (o.F != o.S) {
				unite(o.F, o.S);
				o = get(1, l[x], r[x]);
			}
		}
		if (o.F != -1) {
			ed.pb({o.F, x});
		}
		add(r[x], x);
	}
	
	for (int i = 0; i < ed.size(); i++) {
		int x = find(ed[i].F), y = find(ed[i].S);
		adj[x].pb(y);
		adj[y].pb(x);
	}
	
	int res = 1;
	for (int i = 0; i < n; i++) {
		int x = find(i);
		if (bio[x]) continue;
		res = mul(res, 2);
		dfs(x);
	}
	
	cout << ((E) ? 0 : res);

	return 0;
}

Compilation message

port_facility.cpp:3: warning: ignoring '#pragma gcc ' [-Wunknown-pragmas]
    3 | #pragma gcc("O3, unroll-loops")
      | 
port_facility.cpp: In function 'int main()':
port_facility.cpp:97:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   97 |  for (int i = 0; i < ed.size(); i++) {
      |                  ~~^~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 19 ms 80220 KB Output is correct
2 Correct 20 ms 80208 KB Output is correct
3 Correct 20 ms 80220 KB Output is correct
4 Correct 19 ms 80096 KB Output is correct
5 Correct 19 ms 80220 KB Output is correct
6 Correct 20 ms 80220 KB Output is correct
7 Correct 18 ms 80220 KB Output is correct
8 Correct 19 ms 80100 KB Output is correct
9 Correct 18 ms 80216 KB Output is correct
10 Correct 20 ms 80216 KB Output is correct
11 Correct 19 ms 80288 KB Output is correct
12 Correct 19 ms 80216 KB Output is correct
13 Correct 19 ms 80220 KB Output is correct
14 Correct 20 ms 80208 KB Output is correct
15 Correct 19 ms 80216 KB Output is correct
16 Correct 23 ms 80220 KB Output is correct
17 Correct 22 ms 80296 KB Output is correct
18 Correct 19 ms 80220 KB Output is correct
19 Correct 19 ms 80216 KB Output is correct
20 Correct 17 ms 80220 KB Output is correct
21 Correct 20 ms 80216 KB Output is correct
22 Correct 20 ms 80216 KB Output is correct
23 Correct 19 ms 80220 KB Output is correct
24 Correct 18 ms 80120 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 19 ms 80220 KB Output is correct
2 Correct 20 ms 80208 KB Output is correct
3 Correct 20 ms 80220 KB Output is correct
4 Correct 19 ms 80096 KB Output is correct
5 Correct 19 ms 80220 KB Output is correct
6 Correct 20 ms 80220 KB Output is correct
7 Correct 18 ms 80220 KB Output is correct
8 Correct 19 ms 80100 KB Output is correct
9 Correct 18 ms 80216 KB Output is correct
10 Correct 20 ms 80216 KB Output is correct
11 Correct 19 ms 80288 KB Output is correct
12 Correct 19 ms 80216 KB Output is correct
13 Correct 19 ms 80220 KB Output is correct
14 Correct 20 ms 80208 KB Output is correct
15 Correct 19 ms 80216 KB Output is correct
16 Correct 23 ms 80220 KB Output is correct
17 Correct 22 ms 80296 KB Output is correct
18 Correct 19 ms 80220 KB Output is correct
19 Correct 19 ms 80216 KB Output is correct
20 Correct 17 ms 80220 KB Output is correct
21 Correct 20 ms 80216 KB Output is correct
22 Correct 20 ms 80216 KB Output is correct
23 Correct 19 ms 80220 KB Output is correct
24 Correct 18 ms 80120 KB Output is correct
25 Correct 20 ms 80476 KB Output is correct
26 Correct 23 ms 80248 KB Output is correct
27 Correct 22 ms 80472 KB Output is correct
28 Correct 22 ms 80476 KB Output is correct
29 Correct 21 ms 80484 KB Output is correct
30 Correct 21 ms 80476 KB Output is correct
31 Correct 21 ms 80492 KB Output is correct
32 Correct 21 ms 80472 KB Output is correct
33 Correct 18 ms 80476 KB Output is correct
34 Correct 21 ms 80472 KB Output is correct
35 Correct 19 ms 80220 KB Output is correct
36 Correct 20 ms 80216 KB Output is correct
37 Correct 27 ms 80468 KB Output is correct
38 Correct 21 ms 80720 KB Output is correct
39 Correct 19 ms 80472 KB Output is correct
40 Correct 22 ms 80236 KB Output is correct
41 Correct 20 ms 80476 KB Output is correct
42 Correct 20 ms 80476 KB Output is correct
43 Correct 20 ms 80476 KB Output is correct
44 Correct 19 ms 80476 KB Output is correct

Subtask #3
56.0 / 56.0

# Verdict Execution time Memory Grader output
1 Correct 19 ms 80220 KB Output is correct
2 Correct 20 ms 80208 KB Output is correct
3 Correct 20 ms 80220 KB Output is correct
4 Correct 19 ms 80096 KB Output is correct
5 Correct 19 ms 80220 KB Output is correct
6 Correct 20 ms 80220 KB Output is correct
7 Correct 18 ms 80220 KB Output is correct
8 Correct 19 ms 80100 KB Output is correct
9 Correct 18 ms 80216 KB Output is correct
10 Correct 20 ms 80216 KB Output is correct
11 Correct 19 ms 80288 KB Output is correct
12 Correct 19 ms 80216 KB Output is correct
13 Correct 19 ms 80220 KB Output is correct
14 Correct 20 ms 80208 KB Output is correct
15 Correct 19 ms 80216 KB Output is correct
16 Correct 23 ms 80220 KB Output is correct
17 Correct 22 ms 80296 KB Output is correct
18 Correct 19 ms 80220 KB Output is correct
19 Correct 19 ms 80216 KB Output is correct
20 Correct 17 ms 80220 KB Output is correct
21 Correct 20 ms 80216 KB Output is correct
22 Correct 20 ms 80216 KB Output is correct
23 Correct 19 ms 80220 KB Output is correct
24 Correct 18 ms 80120 KB Output is correct
25 Correct 20 ms 80476 KB Output is correct
26 Correct 23 ms 80248 KB Output is correct
27 Correct 22 ms 80472 KB Output is correct
28 Correct 22 ms 80476 KB Output is correct
29 Correct 21 ms 80484 KB Output is correct
30 Correct 21 ms 80476 KB Output is correct
31 Correct 21 ms 80492 KB Output is correct
32 Correct 21 ms 80472 KB Output is correct
33 Correct 18 ms 80476 KB Output is correct
34 Correct 21 ms 80472 KB Output is correct
35 Correct 19 ms 80220 KB Output is correct
36 Correct 20 ms 80216 KB Output is correct
37 Correct 27 ms 80468 KB Output is correct
38 Correct 21 ms 80720 KB Output is correct
39 Correct 19 ms 80472 KB Output is correct
40 Correct 22 ms 80236 KB Output is correct
41 Correct 20 ms 80476 KB Output is correct
42 Correct 20 ms 80476 KB Output is correct
43 Correct 20 ms 80476 KB Output is correct
44 Correct 19 ms 80476 KB Output is correct
45 Correct 97 ms 89796 KB Output is correct
46 Correct 90 ms 89796 KB Output is correct
47 Correct 100 ms 89776 KB Output is correct
48 Correct 96 ms 89800 KB Output is correct
49 Correct 106 ms 89772 KB Output is correct
50 Correct 92 ms 89764 KB Output is correct
51 Correct 90 ms 89792 KB Output is correct
52 Correct 63 ms 87288 KB Output is correct
53 Correct 68 ms 87240 KB Output is correct
54 Correct 106 ms 89788 KB Output is correct
55 Correct 109 ms 89540 KB Output is correct
56 Correct 104 ms 89540 KB Output is correct
57 Correct 70 ms 91328 KB Output is correct
58 Correct 62 ms 87296 KB Output is correct
59 Correct 71 ms 88264 KB Output is correct
60 Correct 100 ms 89548 KB Output is correct
61 Correct 85 ms 89796 KB Output is correct
62 Correct 77 ms 88772 KB Output is correct
63 Correct 81 ms 89500 KB Output is correct
64 Correct 91 ms 90052 KB Output is correct
65 Correct 111 ms 90312 KB Output is correct
66 Correct 111 ms 90568 KB Output is correct
67 Correct 93 ms 90052 KB Output is correct
68 Correct 105 ms 90084 KB Output is correct
69 Correct 92 ms 91052 KB Output is correct
70 Correct 109 ms 91036 KB Output is correct
71 Correct 90 ms 90052 KB Output is correct
72 Correct 94 ms 90108 KB Output is correct
73 Correct 88 ms 90816 KB Output is correct
74 Correct 91 ms 90820 KB Output is correct
75 Correct 77 ms 94284 KB Output is correct
76 Correct 74 ms 96324 KB Output is correct
77 Correct 74 ms 96332 KB Output is correct
78 Correct 92 ms 89796 KB Output is correct
79 Correct 88 ms 89796 KB Output is correct

Subtask #4
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 19 ms 80220 KB Output is correct
2 Correct 20 ms 80208 KB Output is correct
3 Correct 20 ms 80220 KB Output is correct
4 Correct 19 ms 80096 KB Output is correct
5 Correct 19 ms 80220 KB Output is correct
6 Correct 20 ms 80220 KB Output is correct
7 Correct 18 ms 80220 KB Output is correct
8 Correct 19 ms 80100 KB Output is correct
9 Correct 18 ms 80216 KB Output is correct
10 Correct 20 ms 80216 KB Output is correct
11 Correct 19 ms 80288 KB Output is correct
12 Correct 19 ms 80216 KB Output is correct
13 Correct 19 ms 80220 KB Output is correct
14 Correct 20 ms 80208 KB Output is correct
15 Correct 19 ms 80216 KB Output is correct
16 Correct 23 ms 80220 KB Output is correct
17 Correct 22 ms 80296 KB Output is correct
18 Correct 19 ms 80220 KB Output is correct
19 Correct 19 ms 80216 KB Output is correct
20 Correct 17 ms 80220 KB Output is correct
21 Correct 20 ms 80216 KB Output is correct
22 Correct 20 ms 80216 KB Output is correct
23 Correct 19 ms 80220 KB Output is correct
24 Correct 18 ms 80120 KB Output is correct
25 Correct 20 ms 80476 KB Output is correct
26 Correct 23 ms 80248 KB Output is correct
27 Correct 22 ms 80472 KB Output is correct
28 Correct 22 ms 80476 KB Output is correct
29 Correct 21 ms 80484 KB Output is correct
30 Correct 21 ms 80476 KB Output is correct
31 Correct 21 ms 80492 KB Output is correct
32 Correct 21 ms 80472 KB Output is correct
33 Correct 18 ms 80476 KB Output is correct
34 Correct 21 ms 80472 KB Output is correct
35 Correct 19 ms 80220 KB Output is correct
36 Correct 20 ms 80216 KB Output is correct
37 Correct 27 ms 80468 KB Output is correct
38 Correct 21 ms 80720 KB Output is correct
39 Correct 19 ms 80472 KB Output is correct
40 Correct 22 ms 80236 KB Output is correct
41 Correct 20 ms 80476 KB Output is correct
42 Correct 20 ms 80476 KB Output is correct
43 Correct 20 ms 80476 KB Output is correct
44 Correct 19 ms 80476 KB Output is correct
45 Correct 97 ms 89796 KB Output is correct
46 Correct 90 ms 89796 KB Output is correct
47 Correct 100 ms 89776 KB Output is correct
48 Correct 96 ms 89800 KB Output is correct
49 Correct 106 ms 89772 KB Output is correct
50 Correct 92 ms 89764 KB Output is correct
51 Correct 90 ms 89792 KB Output is correct
52 Correct 63 ms 87288 KB Output is correct
53 Correct 68 ms 87240 KB Output is correct
54 Correct 106 ms 89788 KB Output is correct
55 Correct 109 ms 89540 KB Output is correct
56 Correct 104 ms 89540 KB Output is correct
57 Correct 70 ms 91328 KB Output is correct
58 Correct 62 ms 87296 KB Output is correct
59 Correct 71 ms 88264 KB Output is correct
60 Correct 100 ms 89548 KB Output is correct
61 Correct 85 ms 89796 KB Output is correct
62 Correct 77 ms 88772 KB Output is correct
63 Correct 81 ms 89500 KB Output is correct
64 Correct 91 ms 90052 KB Output is correct
65 Correct 111 ms 90312 KB Output is correct
66 Correct 111 ms 90568 KB Output is correct
67 Correct 93 ms 90052 KB Output is correct
68 Correct 105 ms 90084 KB Output is correct
69 Correct 92 ms 91052 KB Output is correct
70 Correct 109 ms 91036 KB Output is correct
71 Correct 90 ms 90052 KB Output is correct
72 Correct 94 ms 90108 KB Output is correct
73 Correct 88 ms 90816 KB Output is correct
74 Correct 91 ms 90820 KB Output is correct
75 Correct 77 ms 94284 KB Output is correct
76 Correct 74 ms 96324 KB Output is correct
77 Correct 74 ms 96332 KB Output is correct
78 Correct 92 ms 89796 KB Output is correct
79 Correct 88 ms 89796 KB Output is correct
80 Correct 930 ms 178092 KB Output is correct
81 Correct 914 ms 178376 KB Output is correct
82 Correct 927 ms 178752 KB Output is correct
83 Correct 930 ms 178236 KB Output is correct
84 Correct 939 ms 178092 KB Output is correct
85 Correct 960 ms 178092 KB Output is correct
86 Correct 972 ms 178332 KB Output is correct
87 Correct 452 ms 153456 KB Output is correct
88 Correct 581 ms 153508 KB Output is correct
89 Correct 1233 ms 178676 KB Output is correct
90 Correct 1217 ms 173496 KB Output is correct
91 Correct 1229 ms 173484 KB Output is correct
92 Correct 654 ms 192452 KB Output is correct
93 Correct 469 ms 153512 KB Output is correct
94 Correct 664 ms 169896 KB Output is correct
95 Correct 899 ms 178080 KB Output is correct
96 Correct 927 ms 179116 KB Output is correct
97 Correct 726 ms 170704 KB Output is correct
98 Correct 898 ms 178124 KB Output is correct
99 Correct 969 ms 177372 KB Output is correct
100 Correct 1518 ms 177944 KB Output is correct
101 Correct 1439 ms 178856 KB Output is correct
102 Correct 872 ms 180908 KB Output is correct
103 Correct 887 ms 180892 KB Output is correct
104 Correct 857 ms 187308 KB Output is correct
105 Correct 846 ms 187560 KB Output is correct
106 Correct 866 ms 180828 KB Output is correct
107 Correct 841 ms 180908 KB Output is correct
108 Correct 864 ms 187300 KB Output is correct
109 Correct 835 ms 187288 KB Output is correct
110 Correct 794 ms 242460 KB Output is correct
111 Correct 731 ms 243468 KB Output is correct
112 Correct 728 ms 243472 KB Output is correct
113 Correct 977 ms 178536 KB Output is correct
114 Correct 965 ms 178508 KB Output is correct