답안 #363135

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
363135 2021-02-05T06:44:05 Z alireza_kaviani Boat (APIO16_boat) C++11
100 / 100
844 ms 8588 KB
#include <bits/stdc++.h>
using namespace std;

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

#define all(x)						(x).begin(),(x).end()
#define X							first
#define Y							second
#define sep							' '
#define endl						'\n'
#define SZ(x)						ll(x.size())

const ll MAXN = 1000 + 10;
const ll LOG = 22;
const ll INF = 8e18;
const ll MOD = 1e9 + 7; //998244353; //1e9 + 9;

ll n , L[MAXN] , R[MAXN] , dp[MAXN][MAXN] , ps[MAXN] , inv[MAXN];
vector<int> compress = {0};

ll poww(ll a , ll b){
	ll ans = 1;
	for( ; b ; b /= 2 , a = a * a % MOD)	if(b & 1)	ans = ans * a % MOD;
	return ans;
}

int main() {
    ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);

	for(int i = 1 ; i < MAXN ; i++)	inv[i] = poww(i , MOD - 2);
//	for(int i = 1 ; i <= 5 ; i++)	cout << i << sep << inv[i] << endl;
	cin >> n;
	for(int i = 1 ; i <= n ; i++){
		cin >> L[i] >> R[i]; R[i]++;
		compress.push_back(L[i]);
		compress.push_back(R[i]);
	}
	sort(all(compress));
	compress.resize(unique(all(compress)) - compress.begin());
	dp[0][0] = 1; fill(ps , ps + MAXN , 1);
	for(int i = 1 ; i <= n ; i++){
		L[i] = lower_bound(all(compress) , L[i]) - compress.begin();
		R[i] = lower_bound(all(compress) , R[i]) - compress.begin();
		for(int j = L[i] ; j < R[i] ; j++){
			int len = compress[j + 1] - compress[j];
			for(int k = n ; k >= 2 ; k--){
				dp[j][k] = (dp[j][k] + dp[j][k - 1] * (len - k + 1) % MOD * inv[k]) % MOD;
			}
			dp[j][1] = (dp[j][1] + ps[j - 1] * len) % MOD;
		}
		ps[0] = dp[0][0];
		for(int j = 1 ; j < MAXN ; j++){
			ps[j] = ps[j - 1];
			for(int k = 0 ; k <= n ; k++){
				ps[j] = (ps[j] + dp[j][k]);
			}
			ps[j] %= MOD;
		}
	}
	cout << (ps[MAXN - 1] + MOD - 1) % MOD << endl;

    return 0;
}
/*

*/
# 결과 실행 시간 메모리 Grader output
1 Correct 167 ms 4332 KB Output is correct
2 Correct 176 ms 4416 KB Output is correct
3 Correct 169 ms 4460 KB Output is correct
4 Correct 170 ms 4332 KB Output is correct
5 Correct 177 ms 4332 KB Output is correct
6 Correct 168 ms 4332 KB Output is correct
7 Correct 172 ms 4332 KB Output is correct
8 Correct 167 ms 4332 KB Output is correct
9 Correct 167 ms 4460 KB Output is correct
10 Correct 172 ms 4332 KB Output is correct
11 Correct 167 ms 4332 KB Output is correct
12 Correct 170 ms 4332 KB Output is correct
13 Correct 166 ms 4332 KB Output is correct
14 Correct 164 ms 4332 KB Output is correct
15 Correct 164 ms 4332 KB Output is correct
16 Correct 163 ms 1132 KB Output is correct
17 Correct 181 ms 1132 KB Output is correct
18 Correct 167 ms 1132 KB Output is correct
19 Correct 163 ms 1388 KB Output is correct
20 Correct 170 ms 1132 KB Output is correct
# 결과 실행 시간 메모리 Grader output
1 Correct 167 ms 4332 KB Output is correct
2 Correct 176 ms 4416 KB Output is correct
3 Correct 169 ms 4460 KB Output is correct
4 Correct 170 ms 4332 KB Output is correct
5 Correct 177 ms 4332 KB Output is correct
6 Correct 168 ms 4332 KB Output is correct
7 Correct 172 ms 4332 KB Output is correct
8 Correct 167 ms 4332 KB Output is correct
9 Correct 167 ms 4460 KB Output is correct
10 Correct 172 ms 4332 KB Output is correct
11 Correct 167 ms 4332 KB Output is correct
12 Correct 170 ms 4332 KB Output is correct
13 Correct 166 ms 4332 KB Output is correct
14 Correct 164 ms 4332 KB Output is correct
15 Correct 164 ms 4332 KB Output is correct
16 Correct 163 ms 1132 KB Output is correct
17 Correct 181 ms 1132 KB Output is correct
18 Correct 167 ms 1132 KB Output is correct
19 Correct 163 ms 1388 KB Output is correct
20 Correct 170 ms 1132 KB Output is correct
21 Correct 598 ms 7660 KB Output is correct
22 Correct 602 ms 7788 KB Output is correct
23 Correct 569 ms 7660 KB Output is correct
24 Correct 586 ms 7660 KB Output is correct
25 Correct 611 ms 7660 KB Output is correct
26 Correct 707 ms 7276 KB Output is correct
27 Correct 729 ms 7404 KB Output is correct
28 Correct 723 ms 7288 KB Output is correct
29 Correct 713 ms 7276 KB Output is correct
30 Correct 178 ms 8300 KB Output is correct
31 Correct 178 ms 8428 KB Output is correct
32 Correct 192 ms 8300 KB Output is correct
33 Correct 182 ms 8300 KB Output is correct
34 Correct 188 ms 8292 KB Output is correct
35 Correct 197 ms 8504 KB Output is correct
36 Correct 197 ms 8300 KB Output is correct
37 Correct 183 ms 8428 KB Output is correct
38 Correct 197 ms 8172 KB Output is correct
# 결과 실행 시간 메모리 Grader output
1 Correct 14 ms 1388 KB Output is correct
2 Correct 15 ms 1388 KB Output is correct
3 Correct 13 ms 1388 KB Output is correct
4 Correct 14 ms 1388 KB Output is correct
5 Correct 14 ms 1388 KB Output is correct
6 Correct 19 ms 1388 KB Output is correct
7 Correct 15 ms 1388 KB Output is correct
8 Correct 15 ms 1388 KB Output is correct
9 Correct 15 ms 1388 KB Output is correct
10 Correct 16 ms 1388 KB Output is correct
11 Correct 14 ms 1388 KB Output is correct
12 Correct 14 ms 1388 KB Output is correct
13 Correct 13 ms 1388 KB Output is correct
14 Correct 13 ms 1388 KB Output is correct
15 Correct 14 ms 1388 KB Output is correct
16 Correct 12 ms 876 KB Output is correct
17 Correct 12 ms 876 KB Output is correct
18 Correct 14 ms 876 KB Output is correct
19 Correct 12 ms 876 KB Output is correct
20 Correct 13 ms 876 KB Output is correct
# 결과 실행 시간 메모리 Grader output
1 Correct 167 ms 4332 KB Output is correct
2 Correct 176 ms 4416 KB Output is correct
3 Correct 169 ms 4460 KB Output is correct
4 Correct 170 ms 4332 KB Output is correct
5 Correct 177 ms 4332 KB Output is correct
6 Correct 168 ms 4332 KB Output is correct
7 Correct 172 ms 4332 KB Output is correct
8 Correct 167 ms 4332 KB Output is correct
9 Correct 167 ms 4460 KB Output is correct
10 Correct 172 ms 4332 KB Output is correct
11 Correct 167 ms 4332 KB Output is correct
12 Correct 170 ms 4332 KB Output is correct
13 Correct 166 ms 4332 KB Output is correct
14 Correct 164 ms 4332 KB Output is correct
15 Correct 164 ms 4332 KB Output is correct
16 Correct 163 ms 1132 KB Output is correct
17 Correct 181 ms 1132 KB Output is correct
18 Correct 167 ms 1132 KB Output is correct
19 Correct 163 ms 1388 KB Output is correct
20 Correct 170 ms 1132 KB Output is correct
21 Correct 598 ms 7660 KB Output is correct
22 Correct 602 ms 7788 KB Output is correct
23 Correct 569 ms 7660 KB Output is correct
24 Correct 586 ms 7660 KB Output is correct
25 Correct 611 ms 7660 KB Output is correct
26 Correct 707 ms 7276 KB Output is correct
27 Correct 729 ms 7404 KB Output is correct
28 Correct 723 ms 7288 KB Output is correct
29 Correct 713 ms 7276 KB Output is correct
30 Correct 178 ms 8300 KB Output is correct
31 Correct 178 ms 8428 KB Output is correct
32 Correct 192 ms 8300 KB Output is correct
33 Correct 182 ms 8300 KB Output is correct
34 Correct 188 ms 8292 KB Output is correct
35 Correct 197 ms 8504 KB Output is correct
36 Correct 197 ms 8300 KB Output is correct
37 Correct 183 ms 8428 KB Output is correct
38 Correct 197 ms 8172 KB Output is correct
39 Correct 14 ms 1388 KB Output is correct
40 Correct 15 ms 1388 KB Output is correct
41 Correct 13 ms 1388 KB Output is correct
42 Correct 14 ms 1388 KB Output is correct
43 Correct 14 ms 1388 KB Output is correct
44 Correct 19 ms 1388 KB Output is correct
45 Correct 15 ms 1388 KB Output is correct
46 Correct 15 ms 1388 KB Output is correct
47 Correct 15 ms 1388 KB Output is correct
48 Correct 16 ms 1388 KB Output is correct
49 Correct 14 ms 1388 KB Output is correct
50 Correct 14 ms 1388 KB Output is correct
51 Correct 13 ms 1388 KB Output is correct
52 Correct 13 ms 1388 KB Output is correct
53 Correct 14 ms 1388 KB Output is correct
54 Correct 12 ms 876 KB Output is correct
55 Correct 12 ms 876 KB Output is correct
56 Correct 14 ms 876 KB Output is correct
57 Correct 12 ms 876 KB Output is correct
58 Correct 13 ms 876 KB Output is correct
59 Correct 645 ms 8300 KB Output is correct
60 Correct 635 ms 8300 KB Output is correct
61 Correct 607 ms 8572 KB Output is correct
62 Correct 650 ms 8588 KB Output is correct
63 Correct 624 ms 8300 KB Output is correct
64 Correct 844 ms 8428 KB Output is correct
65 Correct 789 ms 8460 KB Output is correct
66 Correct 797 ms 8300 KB Output is correct
67 Correct 817 ms 8300 KB Output is correct
68 Correct 802 ms 8428 KB Output is correct
69 Correct 606 ms 8300 KB Output is correct
70 Correct 606 ms 8428 KB Output is correct
71 Correct 619 ms 8444 KB Output is correct
72 Correct 639 ms 8428 KB Output is correct
73 Correct 629 ms 8428 KB Output is correct
74 Correct 234 ms 1868 KB Output is correct
75 Correct 245 ms 2028 KB Output is correct
76 Correct 236 ms 1900 KB Output is correct
77 Correct 256 ms 1900 KB Output is correct
78 Correct 236 ms 1900 KB Output is correct