답안 #236368

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
236368	2020-06-01T15:08:22 Z	LordOfIran	Boat (APIO16_boat)	C++14	100 / 100	514 ms	9172 KB

boat

//                             In The Name Of Allah
//                              Mohammad Hosseini
#include <bits/stdc++.h>
#define	ss second
#define ff first
#define use_fast ios::sync_with_stdio(false), cin.tie(0), cout.tie(0)
#define ret(n) return cout << n, 0
#define se(n) cout << setprecision(n) << fixed
#define pb push_back
#define int long long
#define ld long double
#pragma GCC optimize("Ofast,no-stack-protector,unroll-loops")
#pragma GCC optimize("no-stack-protector,fast-math")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
using namespace std; 

const int N = 2000, OO = 1e9 + 7, T = 20, M = 1e9 + 7, P = 6151, SQ = 800, lg = 20;
typedef pair <int, int> pii;
pii p[N];
int dp[N][N], inv[N];
vector <int> g[N];

int pw(int x, int y) {
	if(y == 0)
		return 1;
	int cnt = pw(x, y / 2);
	cnt = (cnt * cnt) % M;
	if(y % 2)
		cnt = (cnt * x) % M;
	return cnt;
}

int32_t main() {
    use_fast;
    int n;
    cin >> n;
    vector <int> v = {0, OO};	
	for(int i = 1; i < N - 100; i++)
		inv[i] = pw(i, M - 2);
    for(int i = 1; i <= n; i++) {
    	cin >> p[i].ff >> p[i].ss;
    	p[i].ss++;
    	v.pb(p[i].ff);
    	v.pb(p[i].ss);
	}
    sort(v.begin(), v.end());
    v.resize(unique(v.begin(), v.end()) - v.begin());
	for(int i = 1; i < (int)v.size(); i++)
    	dp[0][i] = 1;
	for(int i = 1; i <= n; i++) {
		for(int j = 1; j < (int)v.size(); j++) {
			dp[i][j] = dp[i][j - 1];
			if(!(p[i].ff <= v[j - 1] && v[j] <= p[i].ss)) 
				continue;
			int l = v[j] - v[j - 1], up = (l * (l - 1) / 2) % M, nxt = 1;
			dp[i][j] = (dp[i][j] + dp[i - 1][j - 1] * l) % M;
			for(int k = (int)g[j].size() - 1; k >= 0; k--) {
				dp[i][j] = (dp[i][j] + dp[g[j][k] - 1][j - 1] * up) % M;
				up = (up * (l + nxt)) % M;
				up = (up * inv[nxt + 2]) % M;
				nxt++;
			}
			g[j].pb(i);
		}
		for(int j = 1; j < (int)v.size(); j++) 
			dp[i][j] = (dp[i][j] + dp[i - 1][j]) % M;
	}
	cout << (dp[n][(int)v.size() - 1] - 1 + M) % M << endl;
	return 0;
} 
/*
be carefull :
1- if not solve after 20 min, read again twice
2- after submit read the code again
3- fun with contest
4- ... 
*/

Subtask #1
9.0 / 9.0

#	결과	실행 시간	메모리	Grader output
1	Correct	11 ms	6400 KB	Output is correct
2	Correct	11 ms	6400 KB	Output is correct
3	Correct	10 ms	6400 KB	Output is correct
4	Correct	11 ms	6400 KB	Output is correct
5	Correct	11 ms	6400 KB	Output is correct
6	Correct	10 ms	6272 KB	Output is correct
7	Correct	10 ms	6400 KB	Output is correct
8	Correct	10 ms	6400 KB	Output is correct
9	Correct	11 ms	6400 KB	Output is correct
10	Correct	11 ms	6400 KB	Output is correct
11	Correct	10 ms	6400 KB	Output is correct
12	Correct	11 ms	6400 KB	Output is correct
13	Correct	11 ms	6400 KB	Output is correct
14	Correct	11 ms	6400 KB	Output is correct
15	Correct	11 ms	6400 KB	Output is correct
16	Correct	7 ms	3200 KB	Output is correct
17	Correct	7 ms	3200 KB	Output is correct
18	Correct	7 ms	3200 KB	Output is correct
19	Correct	7 ms	3200 KB	Output is correct
20	Correct	7 ms	3200 KB	Output is correct

Subtask #2
22.0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	11 ms	6400 KB	Output is correct
2	Correct	11 ms	6400 KB	Output is correct
3	Correct	10 ms	6400 KB	Output is correct
4	Correct	11 ms	6400 KB	Output is correct
5	Correct	11 ms	6400 KB	Output is correct
6	Correct	10 ms	6272 KB	Output is correct
7	Correct	10 ms	6400 KB	Output is correct
8	Correct	10 ms	6400 KB	Output is correct
9	Correct	11 ms	6400 KB	Output is correct
10	Correct	11 ms	6400 KB	Output is correct
11	Correct	10 ms	6400 KB	Output is correct
12	Correct	11 ms	6400 KB	Output is correct
13	Correct	11 ms	6400 KB	Output is correct
14	Correct	11 ms	6400 KB	Output is correct
15	Correct	11 ms	6400 KB	Output is correct
16	Correct	7 ms	3200 KB	Output is correct
17	Correct	7 ms	3200 KB	Output is correct
18	Correct	7 ms	3200 KB	Output is correct
19	Correct	7 ms	3200 KB	Output is correct
20	Correct	7 ms	3200 KB	Output is correct
21	Correct	208 ms	7928 KB	Output is correct
22	Correct	196 ms	7928 KB	Output is correct
23	Correct	177 ms	7544 KB	Output is correct
24	Correct	195 ms	7672 KB	Output is correct
25	Correct	214 ms	7676 KB	Output is correct
26	Correct	445 ms	8184 KB	Output is correct
27	Correct	454 ms	8440 KB	Output is correct
28	Correct	448 ms	8312 KB	Output is correct
29	Correct	440 ms	8184 KB	Output is correct
30	Correct	11 ms	6400 KB	Output is correct
31	Correct	11 ms	6400 KB	Output is correct
32	Correct	11 ms	6400 KB	Output is correct
33	Correct	11 ms	6400 KB	Output is correct
34	Correct	11 ms	6400 KB	Output is correct
35	Correct	10 ms	6400 KB	Output is correct
36	Correct	11 ms	6400 KB	Output is correct
37	Correct	10 ms	6400 KB	Output is correct
38	Correct	11 ms	6400 KB	Output is correct

Subtask #3
27.0 / 27.0

#	결과	실행 시간	메모리	Grader output
1	Correct	7 ms	1024 KB	Output is correct
2	Correct	7 ms	1024 KB	Output is correct
3	Correct	7 ms	1024 KB	Output is correct
4	Correct	7 ms	1024 KB	Output is correct
5	Correct	7 ms	1024 KB	Output is correct
6	Correct	10 ms	1024 KB	Output is correct
7	Correct	10 ms	1024 KB	Output is correct
8	Correct	9 ms	1024 KB	Output is correct
9	Correct	9 ms	1152 KB	Output is correct
10	Correct	10 ms	1024 KB	Output is correct
11	Correct	8 ms	1152 KB	Output is correct
12	Correct	7 ms	1024 KB	Output is correct
13	Correct	7 ms	1024 KB	Output is correct
14	Correct	7 ms	1024 KB	Output is correct
15	Correct	7 ms	1088 KB	Output is correct
16	Correct	7 ms	1024 KB	Output is correct
17	Correct	7 ms	896 KB	Output is correct
18	Correct	7 ms	896 KB	Output is correct
19	Correct	6 ms	1024 KB	Output is correct
20	Correct	7 ms	960 KB	Output is correct

Subtask #4
42.0 / 42.0

#	결과	실행 시간	메모리	Grader output
1	Correct	11 ms	6400 KB	Output is correct
2	Correct	11 ms	6400 KB	Output is correct
3	Correct	10 ms	6400 KB	Output is correct
4	Correct	11 ms	6400 KB	Output is correct
5	Correct	11 ms	6400 KB	Output is correct
6	Correct	10 ms	6272 KB	Output is correct
7	Correct	10 ms	6400 KB	Output is correct
8	Correct	10 ms	6400 KB	Output is correct
9	Correct	11 ms	6400 KB	Output is correct
10	Correct	11 ms	6400 KB	Output is correct
11	Correct	10 ms	6400 KB	Output is correct
12	Correct	11 ms	6400 KB	Output is correct
13	Correct	11 ms	6400 KB	Output is correct
14	Correct	11 ms	6400 KB	Output is correct
15	Correct	11 ms	6400 KB	Output is correct
16	Correct	7 ms	3200 KB	Output is correct
17	Correct	7 ms	3200 KB	Output is correct
18	Correct	7 ms	3200 KB	Output is correct
19	Correct	7 ms	3200 KB	Output is correct
20	Correct	7 ms	3200 KB	Output is correct
21	Correct	208 ms	7928 KB	Output is correct
22	Correct	196 ms	7928 KB	Output is correct
23	Correct	177 ms	7544 KB	Output is correct
24	Correct	195 ms	7672 KB	Output is correct
25	Correct	214 ms	7676 KB	Output is correct
26	Correct	445 ms	8184 KB	Output is correct
27	Correct	454 ms	8440 KB	Output is correct
28	Correct	448 ms	8312 KB	Output is correct
29	Correct	440 ms	8184 KB	Output is correct
30	Correct	11 ms	6400 KB	Output is correct
31	Correct	11 ms	6400 KB	Output is correct
32	Correct	11 ms	6400 KB	Output is correct
33	Correct	11 ms	6400 KB	Output is correct
34	Correct	11 ms	6400 KB	Output is correct
35	Correct	10 ms	6400 KB	Output is correct
36	Correct	11 ms	6400 KB	Output is correct
37	Correct	10 ms	6400 KB	Output is correct
38	Correct	11 ms	6400 KB	Output is correct
39	Correct	7 ms	1024 KB	Output is correct
40	Correct	7 ms	1024 KB	Output is correct
41	Correct	7 ms	1024 KB	Output is correct
42	Correct	7 ms	1024 KB	Output is correct
43	Correct	7 ms	1024 KB	Output is correct
44	Correct	10 ms	1024 KB	Output is correct
45	Correct	10 ms	1024 KB	Output is correct
46	Correct	9 ms	1024 KB	Output is correct
47	Correct	9 ms	1152 KB	Output is correct
48	Correct	10 ms	1024 KB	Output is correct
49	Correct	8 ms	1152 KB	Output is correct
50	Correct	7 ms	1024 KB	Output is correct
51	Correct	7 ms	1024 KB	Output is correct
52	Correct	7 ms	1024 KB	Output is correct
53	Correct	7 ms	1088 KB	Output is correct
54	Correct	7 ms	1024 KB	Output is correct
55	Correct	7 ms	896 KB	Output is correct
56	Correct	7 ms	896 KB	Output is correct
57	Correct	6 ms	1024 KB	Output is correct
58	Correct	7 ms	960 KB	Output is correct
59	Correct	222 ms	8184 KB	Output is correct
60	Correct	198 ms	8056 KB	Output is correct
61	Correct	193 ms	8056 KB	Output is correct
62	Correct	229 ms	8444 KB	Output is correct
63	Correct	216 ms	8184 KB	Output is correct
64	Correct	509 ms	9172 KB	Output is correct
65	Correct	508 ms	9108 KB	Output is correct
66	Correct	509 ms	9072 KB	Output is correct
67	Correct	514 ms	9044 KB	Output is correct
68	Correct	509 ms	8952 KB	Output is correct
69	Correct	188 ms	8184 KB	Output is correct
70	Correct	194 ms	8056 KB	Output is correct
71	Correct	194 ms	8032 KB	Output is correct
72	Correct	206 ms	8056 KB	Output is correct
73	Correct	205 ms	7928 KB	Output is correct
74	Correct	49 ms	3448 KB	Output is correct
75	Correct	46 ms	3448 KB	Output is correct
76	Correct	48 ms	3452 KB	Output is correct
77	Correct	49 ms	3448 KB	Output is correct
78	Correct	50 ms	3576 KB	Output is correct

답안 #236368

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