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Submission #261098

# Submission time Handle Problem Language Result Execution time Memory
261098 2020-08-11T11:32:29 Z srvlt Boat (APIO16_boat) C++17
100 / 100
 138 ms 4480 KB 
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define ld long double
#define pb push_back
#define all(x) begin(x), end(x)
#define SZ(x) (int)(x).size()
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

const int n0 = 503, mod = 1e9 + 7;
int n, l[n0], r[n0], k, inv[n0];

void add(unsigned int & x, int y) {
	x += y;
	x -= (x >= mod) ? mod : 0;
}

int bp(int x, int y) {
	int res = 1;
	while (y) {
		if (y & 1)
			res = (ll)res * x % mod;
		x = (ll)x * x % mod;
		y /= 2;
	}
	return res;
}

struct Block {
	int l = 0, r = 0, t = 0;
	unsigned int val[n0], c[n0], cur = 0, last = 0;
	Block() {
		c[0] = 1;
	}
	void upd(int x) {
		val[t++] = x;
		last = cur;
		add(last, x);
		c[t] = ((ll)c[t - 1] * (r - l + t) % mod) * inv[t] % mod;
		cur = 0;
		for (int i = 0; i < t; i++)
			add(cur, (ll)c[t - i] * val[i] % mod);
	}
};
Block b[1003];

int main() {
	ios_base::sync_with_stdio(false), cin.tie(NULL);
	for (int i = 1; i < n0; i++)
		inv[i] = bp(i, mod - 2);
	cin >> n;
	vector <int> crd;
	for (int i = 0; i < n; i++) {
		cin >> l[i] >> r[i];
		r[i]++;
		crd.pb(l[i]), crd.pb(r[i]);
	}
	crd.pb(0), crd.pb(1);
	sort(all(crd));
	for (int i = 1; i < SZ(crd); i++) {
		if (crd[i - 1] < crd[i]) {
			b[k].l = crd[i - 1];
			b[k++].r = crd[i] - 1;
		}
	}
	b[0].upd(1);
	for (int i = 0; i < n; i++) {
		unsigned int cur = 0;
		int j = 0;
		for (; j < k && b[j].r < l[i]; j++)
			add(cur, b[j].cur);
		for (; j < k && b[j].r < r[i]; j++) {
			b[j].upd(cur);
			cur = b[j].last;
		}
	}
	unsigned int res = 0;
	for (int i = 0; i < k; i++)
		add(res, b[i].cur);
	add(res, mod - 1);
	cout << res;
}

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4352 KB Output is correct
2 Correct 5 ms 4480 KB Output is correct
3 Correct 3 ms 4352 KB Output is correct
4 Correct 3 ms 4352 KB Output is correct
5 Correct 3 ms 4352 KB Output is correct
6 Correct 3 ms 4352 KB Output is correct
7 Correct 3 ms 4352 KB Output is correct
8 Correct 3 ms 4352 KB Output is correct
9 Correct 3 ms 4352 KB Output is correct
10 Correct 3 ms 4352 KB Output is correct
11 Correct 4 ms 4352 KB Output is correct
12 Correct 3 ms 4352 KB Output is correct
13 Correct 3 ms 4352 KB Output is correct
14 Correct 3 ms 4352 KB Output is correct
15 Correct 3 ms 4352 KB Output is correct
16 Correct 3 ms 4352 KB Output is correct
17 Correct 3 ms 4352 KB Output is correct
18 Correct 3 ms 4352 KB Output is correct
19 Correct 3 ms 4352 KB Output is correct
20 Correct 3 ms 4352 KB Output is correct

Subtask #2
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4352 KB Output is correct
2 Correct 5 ms 4480 KB Output is correct
3 Correct 3 ms 4352 KB Output is correct
4 Correct 3 ms 4352 KB Output is correct
5 Correct 3 ms 4352 KB Output is correct
6 Correct 3 ms 4352 KB Output is correct
7 Correct 3 ms 4352 KB Output is correct
8 Correct 3 ms 4352 KB Output is correct
9 Correct 3 ms 4352 KB Output is correct
10 Correct 3 ms 4352 KB Output is correct
11 Correct 4 ms 4352 KB Output is correct
12 Correct 3 ms 4352 KB Output is correct
13 Correct 3 ms 4352 KB Output is correct
14 Correct 3 ms 4352 KB Output is correct
15 Correct 3 ms 4352 KB Output is correct
16 Correct 3 ms 4352 KB Output is correct
17 Correct 3 ms 4352 KB Output is correct
18 Correct 3 ms 4352 KB Output is correct
19 Correct 3 ms 4352 KB Output is correct
20 Correct 3 ms 4352 KB Output is correct
21 Correct 50 ms 4352 KB Output is correct
22 Correct 49 ms 4352 KB Output is correct
23 Correct 43 ms 4352 KB Output is correct
24 Correct 48 ms 4352 KB Output is correct
25 Correct 49 ms 4352 KB Output is correct
26 Correct 104 ms 4352 KB Output is correct
27 Correct 106 ms 4352 KB Output is correct
28 Correct 103 ms 4368 KB Output is correct
29 Correct 103 ms 4352 KB Output is correct
30 Correct 3 ms 4352 KB Output is correct
31 Correct 3 ms 4352 KB Output is correct
32 Correct 3 ms 4352 KB Output is correct
33 Correct 3 ms 4480 KB Output is correct
34 Correct 3 ms 4352 KB Output is correct
35 Correct 3 ms 4352 KB Output is correct
36 Correct 3 ms 4352 KB Output is correct
37 Correct 3 ms 4352 KB Output is correct
38 Correct 3 ms 4352 KB Output is correct

Subtask #3
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4352 KB Output is correct
2 Correct 3 ms 4352 KB Output is correct
3 Correct 3 ms 4352 KB Output is correct
4 Correct 3 ms 4352 KB Output is correct
5 Correct 4 ms 4352 KB Output is correct
6 Correct 3 ms 4352 KB Output is correct
7 Correct 4 ms 4352 KB Output is correct
8 Correct 5 ms 4352 KB Output is correct
9 Correct 4 ms 4352 KB Output is correct
10 Correct 4 ms 4352 KB Output is correct
11 Correct 4 ms 4352 KB Output is correct
12 Correct 3 ms 4352 KB Output is correct
13 Correct 3 ms 4352 KB Output is correct
14 Correct 3 ms 4352 KB Output is correct
15 Correct 3 ms 4352 KB Output is correct
16 Correct 3 ms 4352 KB Output is correct
17 Correct 3 ms 4352 KB Output is correct
18 Correct 3 ms 4352 KB Output is correct
19 Correct 3 ms 4352 KB Output is correct
20 Correct 3 ms 4352 KB Output is correct

Subtask #4
42.0 / 42.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4352 KB Output is correct
2 Correct 5 ms 4480 KB Output is correct
3 Correct 3 ms 4352 KB Output is correct
4 Correct 3 ms 4352 KB Output is correct
5 Correct 3 ms 4352 KB Output is correct
6 Correct 3 ms 4352 KB Output is correct
7 Correct 3 ms 4352 KB Output is correct
8 Correct 3 ms 4352 KB Output is correct
9 Correct 3 ms 4352 KB Output is correct
10 Correct 3 ms 4352 KB Output is correct
11 Correct 4 ms 4352 KB Output is correct
12 Correct 3 ms 4352 KB Output is correct
13 Correct 3 ms 4352 KB Output is correct
14 Correct 3 ms 4352 KB Output is correct
15 Correct 3 ms 4352 KB Output is correct
16 Correct 3 ms 4352 KB Output is correct
17 Correct 3 ms 4352 KB Output is correct
18 Correct 3 ms 4352 KB Output is correct
19 Correct 3 ms 4352 KB Output is correct
20 Correct 3 ms 4352 KB Output is correct
21 Correct 50 ms 4352 KB Output is correct
22 Correct 49 ms 4352 KB Output is correct
23 Correct 43 ms 4352 KB Output is correct
24 Correct 48 ms 4352 KB Output is correct
25 Correct 49 ms 4352 KB Output is correct
26 Correct 104 ms 4352 KB Output is correct
27 Correct 106 ms 4352 KB Output is correct
28 Correct 103 ms 4368 KB Output is correct
29 Correct 103 ms 4352 KB Output is correct
30 Correct 3 ms 4352 KB Output is correct
31 Correct 3 ms 4352 KB Output is correct
32 Correct 3 ms 4352 KB Output is correct
33 Correct 3 ms 4480 KB Output is correct
34 Correct 3 ms 4352 KB Output is correct
35 Correct 3 ms 4352 KB Output is correct
36 Correct 3 ms 4352 KB Output is correct
37 Correct 3 ms 4352 KB Output is correct
38 Correct 3 ms 4352 KB Output is correct
39 Correct 3 ms 4352 KB Output is correct
40 Correct 3 ms 4352 KB Output is correct
41 Correct 3 ms 4352 KB Output is correct
42 Correct 3 ms 4352 KB Output is correct
43 Correct 4 ms 4352 KB Output is correct
44 Correct 3 ms 4352 KB Output is correct
45 Correct 4 ms 4352 KB Output is correct
46 Correct 5 ms 4352 KB Output is correct
47 Correct 4 ms 4352 KB Output is correct
48 Correct 4 ms 4352 KB Output is correct
49 Correct 4 ms 4352 KB Output is correct
50 Correct 3 ms 4352 KB Output is correct
51 Correct 3 ms 4352 KB Output is correct
52 Correct 3 ms 4352 KB Output is correct
53 Correct 3 ms 4352 KB Output is correct
54 Correct 3 ms 4352 KB Output is correct
55 Correct 3 ms 4352 KB Output is correct
56 Correct 3 ms 4352 KB Output is correct
57 Correct 3 ms 4352 KB Output is correct
58 Correct 3 ms 4352 KB Output is correct
59 Correct 56 ms 4352 KB Output is correct
60 Correct 52 ms 4376 KB Output is correct
61 Correct 50 ms 4352 KB Output is correct
62 Correct 60 ms 4480 KB Output is correct
63 Correct 64 ms 4352 KB Output is correct
64 Correct 120 ms 4352 KB Output is correct
65 Correct 118 ms 4352 KB Output is correct
66 Correct 138 ms 4472 KB Output is correct
67 Correct 119 ms 4352 KB Output is correct
68 Correct 131 ms 4352 KB Output is correct
69 Correct 48 ms 4352 KB Output is correct
70 Correct 50 ms 4376 KB Output is correct
71 Correct 48 ms 4352 KB Output is correct
72 Correct 50 ms 4352 KB Output is correct
73 Correct 50 ms 4352 KB Output is correct
74 Correct 12 ms 4352 KB Output is correct
75 Correct 12 ms 4352 KB Output is correct
76 Correct 12 ms 4352 KB Output is correct
77 Correct 13 ms 4352 KB Output is correct
78 Correct 13 ms 4352 KB Output is correct