답안 #48487 :: oj.uz

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
48487	2018-05-14T12:34:02 Z	octopuses	Boat (APIO16_boat)	C++17	100 / 100	1517 ms	17512 KB

boat

#include <bits/stdc++.h>

#define ll long long
#define fr first
#define sc second
#define M (ll)(1e9 + 7)

using namespace std;
const int N = 1020;

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

ll F[N];

inline ll cnt(ll n, ll k)
{
  if(n - k < k)
    k = n - k;
  ll s = 1ll;
  for(int i = n; i > n - k; -- i)
    s = (s * i) % M;
  s = (s * F[k]) % M;
  return s;
}

int n, tot;
int x[N], y[N], a[N];
ll C[N][N], A[N][N], S[N];
map < int, int > mp;
vector < int > ar;


int main()
{
  F[0] = 1;
  for(int i = 1; i < N; ++ i)
    F[i] = (F[i - 1] * i) % M;
  for(int i = 0; i < N; ++ i)
    F[i] = pw(F[i], M - 2);
  scanf("%d", &n);
  for(int i = 0; i < n; ++ i)
  {
    scanf("%d %d", &x[i], &y[i]);
    mp[x[i]] = 1;
    mp[y[i] + 1] = 1;
  }
  tot = 0;
  for(map < int, int >::iterator it = mp.begin(); it != mp.end(); ++ it)
  {
    ar.push_back(it -> fr);
    it -> sc = tot ++;
  }
  for(int i = 1; i < tot; ++ i)
    a[i] = ar[i] - ar[i - 1];
  for(int i = 0; i < n; ++ i)
  {
    y[i] = mp[y[i] + 1] + 1;
    x[i] = mp[x[i]] + 1;
  }
  for(int i = 1; i < tot; ++ i)
    for(int j = 1; j <= n; ++ j)
      C[i][j] = cnt(a[i] + j - 1, j);
  S[0] = 1; ll s;
  for(int k = 0; k < n; ++ k)
  {
    s = 0;
    for(int i = 0; i < x[k]; ++ i)
      s = (s + S[i]) % M;
    for(int i = x[k]; i < y[k]; ++ i)
    {
      A[i][0] = s;
      s = (s + S[i]) % M;
      S[i] = 0;
      for(int j = n; j > 0; -- j)
      {
        A[i][j] = A[i][j - 1];
        S[i] = ((A[i][j] * C[i][j]) % M + S[i]) % M;
      }
    }
  }
  s = 0;
  for(int i = 1; i < tot; ++ i)
    s = (s + S[i]) % M;
  cout << s << endl;
}

Compilation message

boat.cpp: In function 'int main()':
boat.cpp:49:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &n);
   ~~~~~^~~~~~~~~~
boat.cpp:52:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &x[i], &y[i]);
     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
9.0 / 9.0

#	결과	실행 시간	메모리	Grader output
1	Correct	421 ms	12372 KB	Output is correct
2	Correct	402 ms	12428 KB	Output is correct
3	Correct	398 ms	12444 KB	Output is correct
4	Correct	400 ms	12444 KB	Output is correct
5	Correct	398 ms	12612 KB	Output is correct
6	Correct	399 ms	12636 KB	Output is correct
7	Correct	398 ms	12664 KB	Output is correct
8	Correct	404 ms	12664 KB	Output is correct
9	Correct	399 ms	12664 KB	Output is correct
10	Correct	402 ms	12664 KB	Output is correct
11	Correct	403 ms	12664 KB	Output is correct
12	Correct	403 ms	12664 KB	Output is correct
13	Correct	402 ms	12760 KB	Output is correct
14	Correct	409 ms	12760 KB	Output is correct
15	Correct	403 ms	12776 KB	Output is correct
16	Correct	74 ms	12776 KB	Output is correct
17	Correct	79 ms	12776 KB	Output is correct
18	Correct	76 ms	12776 KB	Output is correct
19	Correct	79 ms	12776 KB	Output is correct
20	Correct	77 ms	12776 KB	Output is correct

Subtask #2
22.0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	421 ms	12372 KB	Output is correct
2	Correct	402 ms	12428 KB	Output is correct
3	Correct	398 ms	12444 KB	Output is correct
4	Correct	400 ms	12444 KB	Output is correct
5	Correct	398 ms	12612 KB	Output is correct
6	Correct	399 ms	12636 KB	Output is correct
7	Correct	398 ms	12664 KB	Output is correct
8	Correct	404 ms	12664 KB	Output is correct
9	Correct	399 ms	12664 KB	Output is correct
10	Correct	402 ms	12664 KB	Output is correct
11	Correct	403 ms	12664 KB	Output is correct
12	Correct	403 ms	12664 KB	Output is correct
13	Correct	402 ms	12760 KB	Output is correct
14	Correct	409 ms	12760 KB	Output is correct
15	Correct	403 ms	12776 KB	Output is correct
16	Correct	74 ms	12776 KB	Output is correct
17	Correct	79 ms	12776 KB	Output is correct
18	Correct	76 ms	12776 KB	Output is correct
19	Correct	79 ms	12776 KB	Output is correct
20	Correct	77 ms	12776 KB	Output is correct
21	Correct	486 ms	15304 KB	Output is correct
22	Correct	480 ms	15568 KB	Output is correct
23	Correct	476 ms	15568 KB	Output is correct
24	Correct	498 ms	15568 KB	Output is correct
25	Correct	487 ms	15568 KB	Output is correct
26	Correct	629 ms	15568 KB	Output is correct
27	Correct	663 ms	15568 KB	Output is correct
28	Correct	658 ms	15568 KB	Output is correct
29	Correct	640 ms	15568 KB	Output is correct
30	Correct	382 ms	16784 KB	Output is correct
31	Correct	382 ms	16800 KB	Output is correct
32	Correct	388 ms	16836 KB	Output is correct
33	Correct	387 ms	16856 KB	Output is correct
34	Correct	387 ms	16856 KB	Output is correct
35	Correct	379 ms	16868 KB	Output is correct
36	Correct	382 ms	16940 KB	Output is correct
37	Correct	390 ms	16940 KB	Output is correct
38	Correct	391 ms	16940 KB	Output is correct

Subtask #3
27.0 / 27.0

#	결과	실행 시간	메모리	Grader output
1	Correct	13 ms	16940 KB	Output is correct
2	Correct	13 ms	16940 KB	Output is correct
3	Correct	18 ms	16940 KB	Output is correct
4	Correct	14 ms	16940 KB	Output is correct
5	Correct	14 ms	16940 KB	Output is correct
6	Correct	15 ms	16940 KB	Output is correct
7	Correct	15 ms	16940 KB	Output is correct
8	Correct	16 ms	16940 KB	Output is correct
9	Correct	15 ms	16940 KB	Output is correct
10	Correct	17 ms	16940 KB	Output is correct
11	Correct	14 ms	16940 KB	Output is correct
12	Correct	13 ms	16940 KB	Output is correct
13	Correct	13 ms	16940 KB	Output is correct
14	Correct	13 ms	16940 KB	Output is correct
15	Correct	14 ms	16940 KB	Output is correct
16	Correct	8 ms	16940 KB	Output is correct
17	Correct	8 ms	16940 KB	Output is correct
18	Correct	8 ms	16940 KB	Output is correct
19	Correct	8 ms	16940 KB	Output is correct
20	Correct	8 ms	16940 KB	Output is correct

Subtask #4
42.0 / 42.0

#	결과	실행 시간	메모리	Grader output
1	Correct	421 ms	12372 KB	Output is correct
2	Correct	402 ms	12428 KB	Output is correct
3	Correct	398 ms	12444 KB	Output is correct
4	Correct	400 ms	12444 KB	Output is correct
5	Correct	398 ms	12612 KB	Output is correct
6	Correct	399 ms	12636 KB	Output is correct
7	Correct	398 ms	12664 KB	Output is correct
8	Correct	404 ms	12664 KB	Output is correct
9	Correct	399 ms	12664 KB	Output is correct
10	Correct	402 ms	12664 KB	Output is correct
11	Correct	403 ms	12664 KB	Output is correct
12	Correct	403 ms	12664 KB	Output is correct
13	Correct	402 ms	12760 KB	Output is correct
14	Correct	409 ms	12760 KB	Output is correct
15	Correct	403 ms	12776 KB	Output is correct
16	Correct	74 ms	12776 KB	Output is correct
17	Correct	79 ms	12776 KB	Output is correct
18	Correct	76 ms	12776 KB	Output is correct
19	Correct	79 ms	12776 KB	Output is correct
20	Correct	77 ms	12776 KB	Output is correct
21	Correct	486 ms	15304 KB	Output is correct
22	Correct	480 ms	15568 KB	Output is correct
23	Correct	476 ms	15568 KB	Output is correct
24	Correct	498 ms	15568 KB	Output is correct
25	Correct	487 ms	15568 KB	Output is correct
26	Correct	629 ms	15568 KB	Output is correct
27	Correct	663 ms	15568 KB	Output is correct
28	Correct	658 ms	15568 KB	Output is correct
29	Correct	640 ms	15568 KB	Output is correct
30	Correct	382 ms	16784 KB	Output is correct
31	Correct	382 ms	16800 KB	Output is correct
32	Correct	388 ms	16836 KB	Output is correct
33	Correct	387 ms	16856 KB	Output is correct
34	Correct	387 ms	16856 KB	Output is correct
35	Correct	379 ms	16868 KB	Output is correct
36	Correct	382 ms	16940 KB	Output is correct
37	Correct	390 ms	16940 KB	Output is correct
38	Correct	391 ms	16940 KB	Output is correct
39	Correct	13 ms	16940 KB	Output is correct
40	Correct	13 ms	16940 KB	Output is correct
41	Correct	18 ms	16940 KB	Output is correct
42	Correct	14 ms	16940 KB	Output is correct
43	Correct	14 ms	16940 KB	Output is correct
44	Correct	15 ms	16940 KB	Output is correct
45	Correct	15 ms	16940 KB	Output is correct
46	Correct	16 ms	16940 KB	Output is correct
47	Correct	15 ms	16940 KB	Output is correct
48	Correct	17 ms	16940 KB	Output is correct
49	Correct	14 ms	16940 KB	Output is correct
50	Correct	13 ms	16940 KB	Output is correct
51	Correct	13 ms	16940 KB	Output is correct
52	Correct	13 ms	16940 KB	Output is correct
53	Correct	14 ms	16940 KB	Output is correct
54	Correct	8 ms	16940 KB	Output is correct
55	Correct	8 ms	16940 KB	Output is correct
56	Correct	8 ms	16940 KB	Output is correct
57	Correct	8 ms	16940 KB	Output is correct
58	Correct	8 ms	16940 KB	Output is correct
59	Correct	1272 ms	17256 KB	Output is correct
60	Correct	1259 ms	17280 KB	Output is correct
61	Correct	1232 ms	17344 KB	Output is correct
62	Correct	1277 ms	17344 KB	Output is correct
63	Correct	1285 ms	17344 KB	Output is correct
64	Correct	1490 ms	17344 KB	Output is correct
65	Correct	1489 ms	17344 KB	Output is correct
66	Correct	1510 ms	17444 KB	Output is correct
67	Correct	1500 ms	17444 KB	Output is correct
68	Correct	1517 ms	17444 KB	Output is correct
69	Correct	1248 ms	17444 KB	Output is correct
70	Correct	1309 ms	17512 KB	Output is correct
71	Correct	1263 ms	17512 KB	Output is correct
72	Correct	1268 ms	17512 KB	Output is correct
73	Correct	1272 ms	17512 KB	Output is correct
74	Correct	175 ms	17512 KB	Output is correct
75	Correct	178 ms	17512 KB	Output is correct
76	Correct	180 ms	17512 KB	Output is correct
77	Correct	175 ms	17512 KB	Output is correct
78	Correct	175 ms	17512 KB	Output is correct

답안 #48487

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