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Submission #261096

# Submission time Handle Problem Language Result Execution time Memory
261096 2020-08-11T11:31:49 Z srvlt Boat (APIO16_boat) C++14
100 / 100
 143 ms 8320 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 = 1003, 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[n0];

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 5 ms 8192 KB Output is correct
2 Correct 5 ms 8192 KB Output is correct
3 Correct 7 ms 8192 KB Output is correct
4 Correct 5 ms 8192 KB Output is correct
5 Correct 6 ms 8192 KB Output is correct
6 Correct 5 ms 8192 KB Output is correct
7 Correct 6 ms 8192 KB Output is correct
8 Correct 6 ms 8192 KB Output is correct
9 Correct 5 ms 8192 KB Output is correct
10 Correct 6 ms 8192 KB Output is correct
11 Correct 6 ms 8192 KB Output is correct
12 Correct 6 ms 8192 KB Output is correct
13 Correct 5 ms 8224 KB Output is correct
14 Correct 6 ms 8192 KB Output is correct
15 Correct 5 ms 8192 KB Output is correct
16 Correct 5 ms 8192 KB Output is correct
17 Correct 5 ms 8192 KB Output is correct
18 Correct 5 ms 8192 KB Output is correct
19 Correct 5 ms 8192 KB Output is correct
20 Correct 6 ms 8192 KB Output is correct

Subtask #2
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 8192 KB Output is correct
2 Correct 5 ms 8192 KB Output is correct
3 Correct 7 ms 8192 KB Output is correct
4 Correct 5 ms 8192 KB Output is correct
5 Correct 6 ms 8192 KB Output is correct
6 Correct 5 ms 8192 KB Output is correct
7 Correct 6 ms 8192 KB Output is correct
8 Correct 6 ms 8192 KB Output is correct
9 Correct 5 ms 8192 KB Output is correct
10 Correct 6 ms 8192 KB Output is correct
11 Correct 6 ms 8192 KB Output is correct
12 Correct 6 ms 8192 KB Output is correct
13 Correct 5 ms 8224 KB Output is correct
14 Correct 6 ms 8192 KB Output is correct
15 Correct 5 ms 8192 KB Output is correct
16 Correct 5 ms 8192 KB Output is correct
17 Correct 5 ms 8192 KB Output is correct
18 Correct 5 ms 8192 KB Output is correct
19 Correct 5 ms 8192 KB Output is correct
20 Correct 6 ms 8192 KB Output is correct
21 Correct 69 ms 8300 KB Output is correct
22 Correct 53 ms 8312 KB Output is correct
23 Correct 47 ms 8192 KB Output is correct
24 Correct 52 ms 8192 KB Output is correct
25 Correct 54 ms 8192 KB Output is correct
26 Correct 106 ms 8304 KB Output is correct
27 Correct 110 ms 8192 KB Output is correct
28 Correct 110 ms 8192 KB Output is correct
29 Correct 107 ms 8192 KB Output is correct
30 Correct 6 ms 8192 KB Output is correct
31 Correct 5 ms 8192 KB Output is correct
32 Correct 6 ms 8320 KB Output is correct
33 Correct 6 ms 8192 KB Output is correct
34 Correct 7 ms 8192 KB Output is correct
35 Correct 6 ms 8192 KB Output is correct
36 Correct 7 ms 8192 KB Output is correct
37 Correct 6 ms 8192 KB Output is correct
38 Correct 6 ms 8192 KB Output is correct

Subtask #3
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 8192 KB Output is correct
2 Correct 7 ms 8192 KB Output is correct
3 Correct 5 ms 8192 KB Output is correct
4 Correct 7 ms 8192 KB Output is correct
5 Correct 5 ms 8192 KB Output is correct
6 Correct 6 ms 8192 KB Output is correct
7 Correct 6 ms 8192 KB Output is correct
8 Correct 7 ms 8192 KB Output is correct
9 Correct 7 ms 8192 KB Output is correct
10 Correct 6 ms 8192 KB Output is correct
11 Correct 6 ms 8192 KB Output is correct
12 Correct 5 ms 8192 KB Output is correct
13 Correct 5 ms 8192 KB Output is correct
14 Correct 6 ms 8320 KB Output is correct
15 Correct 5 ms 8192 KB Output is correct
16 Correct 6 ms 8192 KB Output is correct
17 Correct 5 ms 8192 KB Output is correct
18 Correct 6 ms 8224 KB Output is correct
19 Correct 5 ms 8192 KB Output is correct
20 Correct 5 ms 8192 KB Output is correct

Subtask #4
42.0 / 42.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 8192 KB Output is correct
2 Correct 5 ms 8192 KB Output is correct
3 Correct 7 ms 8192 KB Output is correct
4 Correct 5 ms 8192 KB Output is correct
5 Correct 6 ms 8192 KB Output is correct
6 Correct 5 ms 8192 KB Output is correct
7 Correct 6 ms 8192 KB Output is correct
8 Correct 6 ms 8192 KB Output is correct
9 Correct 5 ms 8192 KB Output is correct
10 Correct 6 ms 8192 KB Output is correct
11 Correct 6 ms 8192 KB Output is correct
12 Correct 6 ms 8192 KB Output is correct
13 Correct 5 ms 8224 KB Output is correct
14 Correct 6 ms 8192 KB Output is correct
15 Correct 5 ms 8192 KB Output is correct
16 Correct 5 ms 8192 KB Output is correct
17 Correct 5 ms 8192 KB Output is correct
18 Correct 5 ms 8192 KB Output is correct
19 Correct 5 ms 8192 KB Output is correct
20 Correct 6 ms 8192 KB Output is correct
21 Correct 69 ms 8300 KB Output is correct
22 Correct 53 ms 8312 KB Output is correct
23 Correct 47 ms 8192 KB Output is correct
24 Correct 52 ms 8192 KB Output is correct
25 Correct 54 ms 8192 KB Output is correct
26 Correct 106 ms 8304 KB Output is correct
27 Correct 110 ms 8192 KB Output is correct
28 Correct 110 ms 8192 KB Output is correct
29 Correct 107 ms 8192 KB Output is correct
30 Correct 6 ms 8192 KB Output is correct
31 Correct 5 ms 8192 KB Output is correct
32 Correct 6 ms 8320 KB Output is correct
33 Correct 6 ms 8192 KB Output is correct
34 Correct 7 ms 8192 KB Output is correct
35 Correct 6 ms 8192 KB Output is correct
36 Correct 7 ms 8192 KB Output is correct
37 Correct 6 ms 8192 KB Output is correct
38 Correct 6 ms 8192 KB Output is correct
39 Correct 6 ms 8192 KB Output is correct
40 Correct 7 ms 8192 KB Output is correct
41 Correct 5 ms 8192 KB Output is correct
42 Correct 7 ms 8192 KB Output is correct
43 Correct 5 ms 8192 KB Output is correct
44 Correct 6 ms 8192 KB Output is correct
45 Correct 6 ms 8192 KB Output is correct
46 Correct 7 ms 8192 KB Output is correct
47 Correct 7 ms 8192 KB Output is correct
48 Correct 6 ms 8192 KB Output is correct
49 Correct 6 ms 8192 KB Output is correct
50 Correct 5 ms 8192 KB Output is correct
51 Correct 5 ms 8192 KB Output is correct
52 Correct 6 ms 8320 KB Output is correct
53 Correct 5 ms 8192 KB Output is correct
54 Correct 6 ms 8192 KB Output is correct
55 Correct 5 ms 8192 KB Output is correct
56 Correct 6 ms 8224 KB Output is correct
57 Correct 5 ms 8192 KB Output is correct
58 Correct 5 ms 8192 KB Output is correct
59 Correct 59 ms 8192 KB Output is correct
60 Correct 55 ms 8320 KB Output is correct
61 Correct 53 ms 8192 KB Output is correct
62 Correct 61 ms 8192 KB Output is correct
63 Correct 57 ms 8192 KB Output is correct
64 Correct 121 ms 8192 KB Output is correct
65 Correct 143 ms 8192 KB Output is correct
66 Correct 124 ms 8312 KB Output is correct
67 Correct 122 ms 8192 KB Output is correct
68 Correct 123 ms 8312 KB Output is correct
69 Correct 51 ms 8192 KB Output is correct
70 Correct 51 ms 8312 KB Output is correct
71 Correct 51 ms 8312 KB Output is correct
72 Correct 53 ms 8192 KB Output is correct
73 Correct 54 ms 8192 KB Output is correct
74 Correct 15 ms 8192 KB Output is correct
75 Correct 14 ms 8192 KB Output is correct
76 Correct 22 ms 8192 KB Output is correct
77 Correct 22 ms 8192 KB Output is correct
78 Correct 15 ms 8192 KB Output is correct