답안 #733011

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
733011	2023-04-30T02:28:05 Z	SanguineChameleon	Boat (APIO16_boat)	C++17	100 / 100	890 ms	468 KB

boat

#include <bits/stdc++.h>
using namespace std;

void just_do_it();

int main() {
	#ifdef KAMIRULEZ
		freopen("kamirulez.inp", "r", stdin);
		freopen("kamirulez.out", "w", stdout);
	#endif
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	just_do_it();
	return 0;
}

const int maxn = 5e2 + 20;
const long long mod = 1e9 + 7;
bool flag[maxn];
long long inv[maxn];
long long fact_inv[maxn];
long long cur[maxn];
long long nxt[maxn];
pair<int, int> events[maxn * 2];
int n;

void trans() {
	for (int i = 1; i <= n; i++) {
		if (flag[i]) {
			nxt[i] = cur[i] + 1;
			if (nxt[i] >= mod) {
				nxt[i] -= mod;
			}
		}
		else {
			nxt[i] = cur[i];
		}
	}
	for (int i = 1; i <= n; i++) {
		for (int j = i + 1; j <= n; j++) {
			if (flag[j]) {
				nxt[j] += cur[i];
				if (nxt[j] >= mod) {
					nxt[j] -= mod;
				}
			}
		}
	}
	swap(cur, nxt);
}

void shift(int len) {
	for (int i = 1; i <= n; i++) {
		if (flag[i]) {
			nxt[i] = (cur[i] + len) % mod;
		}
		else {
			nxt[i] = cur[i];
		}
	}
	for (int i = 1; i <= n; i++) {
		int cnt = 0;
		long long num = 1;
		for (int j = i + 1; j <= n; j++) {
			if (flag[j]) {
				cnt++;
				num = num * (len + cnt - 1) % mod;
				if (flag[i]) {
					nxt[j] = (nxt[j] + cur[i] * num % mod * fact_inv[cnt] % mod + num * (len - 1) % mod * fact_inv[cnt + 1] % mod) % mod;
				}
				else {
					nxt[j] = (nxt[j] + cur[i] * num % mod * fact_inv[cnt] % mod) % mod;
				}
			}
		}
	}
	swap(cur, nxt);
}

void just_do_it() {
	inv[1] = 1;
	fact_inv[0] = 1;
	fact_inv[1] = 1;
	for (int i = 2; i < maxn; i++) {
		inv[i] = (mod - mod / i) * inv[mod % i] % mod;
		fact_inv[i] = fact_inv[i - 1] * inv[i] % mod;
	}
	cin >> n;
	for (int i = 1; i <= n; i++) {
		int a, b;
		cin >> a >> b;
		events[i * 2 - 1] = make_pair(a, i);
		events[i * 2] = make_pair(b + 1, -i);
	}
	sort(events + 1, events + n * 2 + 1);
	int cur_t = 0;
	for (int i = 1; i <= n * 2; i++) {
		int nxt_t = events[i].first;
		int id = events[i].second;
		bool begin_t = (i == 1 || events[i].first != events[i - 1].first);
		bool end_t = (i == n * 2 || events[i].first != events[i + 1].first);
		if (begin_t) {
			if (cur_t < nxt_t - 1) {
				shift(nxt_t - 1 - cur_t);
				cur_t = nxt_t - 1;
			}
		}
		if (id > 0) {
			flag[id] = true;
		}
		else {
			flag[-id] = false;
		}
		if (end_t && cur_t == nxt_t - 1) {
			trans();
			cur_t = nxt_t;
		}
	}
	long long res = 0;
	for (int i = 1; i <= n; i++) {
		res += cur[i];
		res %= mod;
	}
	cout << res;
}

Subtask #1
9.0 / 9.0

#	결과	실행 시간	메모리	Grader output
1	Correct	146 ms	340 KB	Output is correct
2	Correct	148 ms	320 KB	Output is correct
3	Correct	150 ms	340 KB	Output is correct
4	Correct	149 ms	320 KB	Output is correct
5	Correct	141 ms	340 KB	Output is correct
6	Correct	151 ms	340 KB	Output is correct
7	Correct	145 ms	340 KB	Output is correct
8	Correct	144 ms	320 KB	Output is correct
9	Correct	142 ms	340 KB	Output is correct
10	Correct	147 ms	340 KB	Output is correct
11	Correct	163 ms	324 KB	Output is correct
12	Correct	138 ms	320 KB	Output is correct
13	Correct	138 ms	212 KB	Output is correct
14	Correct	138 ms	340 KB	Output is correct
15	Correct	160 ms	340 KB	Output is correct
16	Correct	26 ms	340 KB	Output is correct
17	Correct	30 ms	348 KB	Output is correct
18	Correct	27 ms	340 KB	Output is correct
19	Correct	28 ms	340 KB	Output is correct
20	Correct	29 ms	340 KB	Output is correct

Subtask #2
22.0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	146 ms	340 KB	Output is correct
2	Correct	148 ms	320 KB	Output is correct
3	Correct	150 ms	340 KB	Output is correct
4	Correct	149 ms	320 KB	Output is correct
5	Correct	141 ms	340 KB	Output is correct
6	Correct	151 ms	340 KB	Output is correct
7	Correct	145 ms	340 KB	Output is correct
8	Correct	144 ms	320 KB	Output is correct
9	Correct	142 ms	340 KB	Output is correct
10	Correct	147 ms	340 KB	Output is correct
11	Correct	163 ms	324 KB	Output is correct
12	Correct	138 ms	320 KB	Output is correct
13	Correct	138 ms	212 KB	Output is correct
14	Correct	138 ms	340 KB	Output is correct
15	Correct	160 ms	340 KB	Output is correct
16	Correct	26 ms	340 KB	Output is correct
17	Correct	30 ms	348 KB	Output is correct
18	Correct	27 ms	340 KB	Output is correct
19	Correct	28 ms	340 KB	Output is correct
20	Correct	29 ms	340 KB	Output is correct
21	Correct	724 ms	340 KB	Output is correct
22	Correct	698 ms	340 KB	Output is correct
23	Correct	706 ms	340 KB	Output is correct
24	Correct	789 ms	340 KB	Output is correct
25	Correct	726 ms	340 KB	Output is correct
26	Correct	571 ms	340 KB	Output is correct
27	Correct	589 ms	340 KB	Output is correct
28	Correct	590 ms	340 KB	Output is correct
29	Correct	614 ms	340 KB	Output is correct
30	Correct	209 ms	340 KB	Output is correct
31	Correct	190 ms	340 KB	Output is correct
32	Correct	187 ms	340 KB	Output is correct
33	Correct	194 ms	340 KB	Output is correct
34	Correct	200 ms	348 KB	Output is correct
35	Correct	144 ms	460 KB	Output is correct
36	Correct	169 ms	340 KB	Output is correct
37	Correct	152 ms	340 KB	Output is correct
38	Correct	153 ms	340 KB	Output is correct

Subtask #3
27.0 / 27.0

#	결과	실행 시간	메모리	Grader output
1	Correct	8 ms	212 KB	Output is correct
2	Correct	8 ms	212 KB	Output is correct
3	Correct	7 ms	336 KB	Output is correct
4	Correct	8 ms	212 KB	Output is correct
5	Correct	8 ms	336 KB	Output is correct
6	Correct	8 ms	332 KB	Output is correct
7	Correct	8 ms	340 KB	Output is correct
8	Correct	9 ms	336 KB	Output is correct
9	Correct	9 ms	336 KB	Output is correct
10	Correct	8 ms	212 KB	Output is correct
11	Correct	6 ms	212 KB	Output is correct
12	Correct	6 ms	340 KB	Output is correct
13	Correct	6 ms	212 KB	Output is correct
14	Correct	9 ms	212 KB	Output is correct
15	Correct	7 ms	340 KB	Output is correct
16	Correct	4 ms	340 KB	Output is correct
17	Correct	3 ms	340 KB	Output is correct
18	Correct	5 ms	212 KB	Output is correct
19	Correct	3 ms	340 KB	Output is correct
20	Correct	4 ms	212 KB	Output is correct

Subtask #4
42.0 / 42.0

#	결과	실행 시간	메모리	Grader output
1	Correct	146 ms	340 KB	Output is correct
2	Correct	148 ms	320 KB	Output is correct
3	Correct	150 ms	340 KB	Output is correct
4	Correct	149 ms	320 KB	Output is correct
5	Correct	141 ms	340 KB	Output is correct
6	Correct	151 ms	340 KB	Output is correct
7	Correct	145 ms	340 KB	Output is correct
8	Correct	144 ms	320 KB	Output is correct
9	Correct	142 ms	340 KB	Output is correct
10	Correct	147 ms	340 KB	Output is correct
11	Correct	163 ms	324 KB	Output is correct
12	Correct	138 ms	320 KB	Output is correct
13	Correct	138 ms	212 KB	Output is correct
14	Correct	138 ms	340 KB	Output is correct
15	Correct	160 ms	340 KB	Output is correct
16	Correct	26 ms	340 KB	Output is correct
17	Correct	30 ms	348 KB	Output is correct
18	Correct	27 ms	340 KB	Output is correct
19	Correct	28 ms	340 KB	Output is correct
20	Correct	29 ms	340 KB	Output is correct
21	Correct	724 ms	340 KB	Output is correct
22	Correct	698 ms	340 KB	Output is correct
23	Correct	706 ms	340 KB	Output is correct
24	Correct	789 ms	340 KB	Output is correct
25	Correct	726 ms	340 KB	Output is correct
26	Correct	571 ms	340 KB	Output is correct
27	Correct	589 ms	340 KB	Output is correct
28	Correct	590 ms	340 KB	Output is correct
29	Correct	614 ms	340 KB	Output is correct
30	Correct	209 ms	340 KB	Output is correct
31	Correct	190 ms	340 KB	Output is correct
32	Correct	187 ms	340 KB	Output is correct
33	Correct	194 ms	340 KB	Output is correct
34	Correct	200 ms	348 KB	Output is correct
35	Correct	144 ms	460 KB	Output is correct
36	Correct	169 ms	340 KB	Output is correct
37	Correct	152 ms	340 KB	Output is correct
38	Correct	153 ms	340 KB	Output is correct
39	Correct	8 ms	212 KB	Output is correct
40	Correct	8 ms	212 KB	Output is correct
41	Correct	7 ms	336 KB	Output is correct
42	Correct	8 ms	212 KB	Output is correct
43	Correct	8 ms	336 KB	Output is correct
44	Correct	8 ms	332 KB	Output is correct
45	Correct	8 ms	340 KB	Output is correct
46	Correct	9 ms	336 KB	Output is correct
47	Correct	9 ms	336 KB	Output is correct
48	Correct	8 ms	212 KB	Output is correct
49	Correct	6 ms	212 KB	Output is correct
50	Correct	6 ms	340 KB	Output is correct
51	Correct	6 ms	212 KB	Output is correct
52	Correct	9 ms	212 KB	Output is correct
53	Correct	7 ms	340 KB	Output is correct
54	Correct	4 ms	340 KB	Output is correct
55	Correct	3 ms	340 KB	Output is correct
56	Correct	5 ms	212 KB	Output is correct
57	Correct	3 ms	340 KB	Output is correct
58	Correct	4 ms	212 KB	Output is correct
59	Correct	890 ms	340 KB	Output is correct
60	Correct	854 ms	340 KB	Output is correct
61	Correct	861 ms	340 KB	Output is correct
62	Correct	877 ms	340 KB	Output is correct
63	Correct	880 ms	340 KB	Output is correct
64	Correct	856 ms	340 KB	Output is correct
65	Correct	833 ms	340 KB	Output is correct
66	Correct	875 ms	340 KB	Output is correct
67	Correct	822 ms	340 KB	Output is correct
68	Correct	835 ms	340 KB	Output is correct
69	Correct	656 ms	340 KB	Output is correct
70	Correct	629 ms	340 KB	Output is correct
71	Correct	627 ms	340 KB	Output is correct
72	Correct	632 ms	340 KB	Output is correct
73	Correct	642 ms	340 KB	Output is correct
74	Correct	126 ms	340 KB	Output is correct
75	Correct	120 ms	340 KB	Output is correct
76	Correct	115 ms	468 KB	Output is correct
77	Correct	116 ms	328 KB	Output is correct
78	Correct	119 ms	340 KB	Output is correct

답안 #733011

Compilation message

Subtask #1 9.0 / 9.0

Subtask #2 22.0 / 22.0

Subtask #3 27.0 / 27.0

Subtask #4 42.0 / 42.0

Subtask #1
9.0 / 9.0

Subtask #2
22.0 / 22.0

Subtask #3
27.0 / 27.0

Subtask #4
42.0 / 42.0