답안 #294033

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
294033	2020-09-08T14:34:35 Z	Shafin666	Boat (APIO16_boat)	C++14	100 / 100	609 ms	8440 KB

boat

#include <bits/stdc++.h>
#define pb push_back
#define pii pair<ll, ll>
#define nyan "(=^･ω･^=)"
#define read_input         freopen("in.txt","r", stdin)
#define print_output       freopen("out.txt","w", stdout)
typedef long long ll;
typedef long double ld;
using namespace std;

const ll mod = 1e9+7, maxn = 1e3+10;
ll l[maxn], r[maxn];
ll dp[maxn][maxn], sum[maxn][maxn];
ll ncr[maxn][maxn], inv[maxn];
vector<pii> edit;
vector<ll> v;

ll bigmod(ll a, ll b) {
    if(b == 0) return 1;
    ll x = bigmod(a, b/2);
    x = (x * x) % mod;
    if(b & 1) x = (x * a) % mod;
    return x;
}

int main() 
{
    ll n; cin >> n;
    for(ll i = 1; i <= n; i++) {
        cin >> l[i] >> r[i];
        v.pb(l[i]); v.pb(r[i]+1);
    }

    sort(v.begin(), v.end());
    v.erase(unique(v.begin(), v.end()), v.end());

    edit.pb({0, 0});
    for(ll i = 0; i < (ll)v.size()-1; i++) {
        edit.pb({v[i], v[i+1]-1});
    }
    ll m = edit.size() - 1;

    for(ll i = 1; i <= n; i++) inv[i] = bigmod(i, mod-2);

    dp[0][0] = 1;
    for(ll i = 0; i <= m; i++) sum[0][i] = 1;

    for(ll i = 1; i <= n; i++) {
        for(ll j = 1; j <= m; j++) {

            ll L = edit[j].second - edit[j].first + 1;
            ll cnt = 1, mul = L;

            if(!(l[i] <= edit[j].first && r[i] >= edit[j].second)) continue;

            for(ll k = i-1; k >= 0; k--) {
                dp[i][j] = (dp[i][j] + mul * sum[k][j-1]) % mod;
                if(l[k] <= edit[j].first && r[k] >= edit[j].second) {
                    cnt++;
                    mul = (mul * (L + cnt - 1)) % mod;
                    mul = (mul * inv[cnt]) % mod;
                }
            }
        }

        for(ll j = 1; j <= m; j++)
            sum[i][j] = (sum[i][j-1] + dp[i][j]) % mod;
    }

    ll ans = 0;
    for(ll i = 1; i <= n; i++) {
        for(ll j = 1; j <= m; j++)
            ans = (ans + dp[i][j]) % mod;
    }

    cout << ans << endl;

    return 0;
}

Subtask #1
9.0 / 9.0

#	결과	실행 시간	메모리	Grader output
1	Correct	13 ms	6272 KB	Output is correct
2	Correct	13 ms	6272 KB	Output is correct
3	Correct	13 ms	6272 KB	Output is correct
4	Correct	13 ms	6400 KB	Output is correct
5	Correct	13 ms	6272 KB	Output is correct
6	Correct	13 ms	6400 KB	Output is correct
7	Correct	13 ms	6400 KB	Output is correct
8	Correct	13 ms	6400 KB	Output is correct
9	Correct	13 ms	6400 KB	Output is correct
10	Correct	14 ms	6400 KB	Output is correct
11	Correct	13 ms	6400 KB	Output is correct
12	Correct	13 ms	6400 KB	Output is correct
13	Correct	13 ms	6400 KB	Output is correct
14	Correct	14 ms	6400 KB	Output is correct
15	Correct	13 ms	6400 KB	Output is correct
16	Correct	7 ms	5120 KB	Output is correct
17	Correct	7 ms	5120 KB	Output is correct
18	Correct	7 ms	5120 KB	Output is correct
19	Correct	7 ms	5120 KB	Output is correct
20	Correct	8 ms	5120 KB	Output is correct

Subtask #2
22.0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	13 ms	6272 KB	Output is correct
2	Correct	13 ms	6272 KB	Output is correct
3	Correct	13 ms	6272 KB	Output is correct
4	Correct	13 ms	6400 KB	Output is correct
5	Correct	13 ms	6272 KB	Output is correct
6	Correct	13 ms	6400 KB	Output is correct
7	Correct	13 ms	6400 KB	Output is correct
8	Correct	13 ms	6400 KB	Output is correct
9	Correct	13 ms	6400 KB	Output is correct
10	Correct	14 ms	6400 KB	Output is correct
11	Correct	13 ms	6400 KB	Output is correct
12	Correct	13 ms	6400 KB	Output is correct
13	Correct	13 ms	6400 KB	Output is correct
14	Correct	14 ms	6400 KB	Output is correct
15	Correct	13 ms	6400 KB	Output is correct
16	Correct	7 ms	5120 KB	Output is correct
17	Correct	7 ms	5120 KB	Output is correct
18	Correct	7 ms	5120 KB	Output is correct
19	Correct	7 ms	5120 KB	Output is correct
20	Correct	8 ms	5120 KB	Output is correct
21	Correct	311 ms	7548 KB	Output is correct
22	Correct	272 ms	7416 KB	Output is correct
23	Correct	259 ms	7288 KB	Output is correct
24	Correct	271 ms	7420 KB	Output is correct
25	Correct	270 ms	7416 KB	Output is correct
26	Correct	544 ms	8056 KB	Output is correct
27	Correct	549 ms	8056 KB	Output is correct
28	Correct	532 ms	8056 KB	Output is correct
29	Correct	523 ms	8056 KB	Output is correct
30	Correct	14 ms	6400 KB	Output is correct
31	Correct	14 ms	6400 KB	Output is correct
32	Correct	17 ms	6400 KB	Output is correct
33	Correct	14 ms	6400 KB	Output is correct
34	Correct	14 ms	6400 KB	Output is correct
35	Correct	15 ms	6272 KB	Output is correct
36	Correct	15 ms	6272 KB	Output is correct
37	Correct	14 ms	6272 KB	Output is correct
38	Correct	14 ms	6272 KB	Output is correct

Subtask #3
27.0 / 27.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	1408 KB	Output is correct
2	Correct	3 ms	1408 KB	Output is correct
3	Correct	4 ms	1408 KB	Output is correct
4	Correct	4 ms	1408 KB	Output is correct
5	Correct	5 ms	1408 KB	Output is correct
6	Correct	6 ms	1408 KB	Output is correct
7	Correct	7 ms	1408 KB	Output is correct
8	Correct	6 ms	1408 KB	Output is correct
9	Correct	6 ms	1408 KB	Output is correct
10	Correct	6 ms	1408 KB	Output is correct
11	Correct	4 ms	1408 KB	Output is correct
12	Correct	3 ms	1408 KB	Output is correct
13	Correct	4 ms	1408 KB	Output is correct
14	Correct	4 ms	1408 KB	Output is correct
15	Correct	4 ms	1408 KB	Output is correct
16	Correct	3 ms	1280 KB	Output is correct
17	Correct	3 ms	1280 KB	Output is correct
18	Correct	3 ms	1280 KB	Output is correct
19	Correct	3 ms	1280 KB	Output is correct
20	Correct	4 ms	1280 KB	Output is correct

Subtask #4
42.0 / 42.0

#	결과	실행 시간	메모리	Grader output
1	Correct	13 ms	6272 KB	Output is correct
2	Correct	13 ms	6272 KB	Output is correct
3	Correct	13 ms	6272 KB	Output is correct
4	Correct	13 ms	6400 KB	Output is correct
5	Correct	13 ms	6272 KB	Output is correct
6	Correct	13 ms	6400 KB	Output is correct
7	Correct	13 ms	6400 KB	Output is correct
8	Correct	13 ms	6400 KB	Output is correct
9	Correct	13 ms	6400 KB	Output is correct
10	Correct	14 ms	6400 KB	Output is correct
11	Correct	13 ms	6400 KB	Output is correct
12	Correct	13 ms	6400 KB	Output is correct
13	Correct	13 ms	6400 KB	Output is correct
14	Correct	14 ms	6400 KB	Output is correct
15	Correct	13 ms	6400 KB	Output is correct
16	Correct	7 ms	5120 KB	Output is correct
17	Correct	7 ms	5120 KB	Output is correct
18	Correct	7 ms	5120 KB	Output is correct
19	Correct	7 ms	5120 KB	Output is correct
20	Correct	8 ms	5120 KB	Output is correct
21	Correct	311 ms	7548 KB	Output is correct
22	Correct	272 ms	7416 KB	Output is correct
23	Correct	259 ms	7288 KB	Output is correct
24	Correct	271 ms	7420 KB	Output is correct
25	Correct	270 ms	7416 KB	Output is correct
26	Correct	544 ms	8056 KB	Output is correct
27	Correct	549 ms	8056 KB	Output is correct
28	Correct	532 ms	8056 KB	Output is correct
29	Correct	523 ms	8056 KB	Output is correct
30	Correct	14 ms	6400 KB	Output is correct
31	Correct	14 ms	6400 KB	Output is correct
32	Correct	17 ms	6400 KB	Output is correct
33	Correct	14 ms	6400 KB	Output is correct
34	Correct	14 ms	6400 KB	Output is correct
35	Correct	15 ms	6272 KB	Output is correct
36	Correct	15 ms	6272 KB	Output is correct
37	Correct	14 ms	6272 KB	Output is correct
38	Correct	14 ms	6272 KB	Output is correct
39	Correct	4 ms	1408 KB	Output is correct
40	Correct	3 ms	1408 KB	Output is correct
41	Correct	4 ms	1408 KB	Output is correct
42	Correct	4 ms	1408 KB	Output is correct
43	Correct	5 ms	1408 KB	Output is correct
44	Correct	6 ms	1408 KB	Output is correct
45	Correct	7 ms	1408 KB	Output is correct
46	Correct	6 ms	1408 KB	Output is correct
47	Correct	6 ms	1408 KB	Output is correct
48	Correct	6 ms	1408 KB	Output is correct
49	Correct	4 ms	1408 KB	Output is correct
50	Correct	3 ms	1408 KB	Output is correct
51	Correct	4 ms	1408 KB	Output is correct
52	Correct	4 ms	1408 KB	Output is correct
53	Correct	4 ms	1408 KB	Output is correct
54	Correct	3 ms	1280 KB	Output is correct
55	Correct	3 ms	1280 KB	Output is correct
56	Correct	3 ms	1280 KB	Output is correct
57	Correct	3 ms	1280 KB	Output is correct
58	Correct	4 ms	1280 KB	Output is correct
59	Correct	318 ms	7508 KB	Output is correct
60	Correct	295 ms	7288 KB	Output is correct
61	Correct	270 ms	7288 KB	Output is correct
62	Correct	302 ms	7416 KB	Output is correct
63	Correct	298 ms	7416 KB	Output is correct
64	Correct	601 ms	8344 KB	Output is correct
65	Correct	609 ms	8264 KB	Output is correct
66	Correct	601 ms	8440 KB	Output is correct
67	Correct	609 ms	8316 KB	Output is correct
68	Correct	607 ms	8312 KB	Output is correct
69	Correct	246 ms	7488 KB	Output is correct
70	Correct	252 ms	7488 KB	Output is correct
71	Correct	245 ms	7460 KB	Output is correct
72	Correct	258 ms	7544 KB	Output is correct
73	Correct	272 ms	7544 KB	Output is correct
74	Correct	66 ms	5496 KB	Output is correct
75	Correct	60 ms	5368 KB	Output is correct
76	Correct	64 ms	5308 KB	Output is correct
77	Correct	66 ms	5372 KB	Output is correct
78	Correct	67 ms	5364 KB	Output is correct

답안 #294033

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