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Submission #143461

# Submission time Handle Problem Language Result Execution time Memory
143461 2019-08-14T06:50:00 Z HellAngel Boat (APIO16_boat) C++14
100 / 100
 816 ms 20316 KB 
#include <bits/stdc++.h>
#define int long long

using namespace std;
const int maxn = 1007;
const int somod = 1e9 + 7;
int n, m, a[maxn], b[maxn];
int precal[maxn][maxn], precal2[maxn][maxn], s[maxn][maxn], cnt[maxn];
vector<int> vt;

int BIT[maxn], ans[maxn], dp[maxn][maxn], total[maxn];

int Pow(int i, int j)
{
    if(j == 0) return 1;
    int mid = Pow(i, j / 2);
    mid = mid * mid % somod;
    if(j & 1) mid = mid * i % somod;
    return mid;
}

int32_t main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    if(fopen("test.inp", "r")) freopen("test.inp", "r", stdin), freopen("test.out", "w", stdout);
    cin >> n;
    for(int i = 1; i <= n; i++)
    {
        cin >> a[i] >> b[i];
        vt.push_back(a[i]);
        vt.push_back(b[i] + 1);
    }
    sort(vt.begin(), vt.end());
    vt.erase(unique(vt.begin(), vt.end()), vt.end());
    int k = vt.size();
    k--;
    for(int i = 1; i <= k; i++)
    {
        precal[i][0] = 1;
        int Dist = vt[i] - vt[i - 1];
        precal[i][1] = Dist;
        for(int j = 2; j <= n + 1; j++)
        {
            precal[i][j] = precal[i][j - 1] * (Dist + j - 1) % somod * Pow(j, somod - 2) % somod; ///figurate number
        }
    }
    for(int i = 1; i <= k; i++)
    {
        int Dist = vt[i] - vt[i - 1] - 1;
        precal2[i][1] = Dist;
        for(int j = 2; j <= n + 1; j++)
        {
            precal2[i][j] = precal2[i][j - 1] * (Dist + j - 1) % somod * Pow(j, somod - 2) % somod; ///figurate number
        }
    }
    for(int i = 1; i <= n; i++)
    {
        int sum = 0;
        for(int j = 1; j <= k; j++)
        {
            int sum = 0, dem = 1;
            int gau = precal[j][dem];
            if(a[i] <= vt[j - 1] && vt[j] - 1 <= b[i])
            {
                cnt[j]++;
                for(int t = i - 1; t >= 1; t--)
                {
                    sum = (sum + gau * s[t][j - 1]) % somod;
                    if(a[t] <= vt[j - 1] && vt[j] - 1 <= b[t]) gau = (gau + precal2[j][++dem]) % somod;
                }
                sum = (sum + precal[j][cnt[j]]) % somod;
            }
            s[i][j] = (s[i][j - 1] + sum) % somod;
        }
    }
    int ans = 0;
    for(int i = 1; i <= n; i++) ans = (ans + s[i][k]) % somod;
    cout << ans;
}

Compilation message

boat.cpp: In function 'int32_t main()':
boat.cpp:59:13: warning: unused variable 'sum' [-Wunused-variable]
         int sum = 0;
             ^~~
boat.cpp:26:63: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
     if(fopen("test.inp", "r")) freopen("test.inp", "r", stdin), freopen("test.out", "w", stdout);
                                ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
boat.cpp:26:63: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 347 ms 20216 KB Output is correct
2 Correct 344 ms 20272 KB Output is correct
3 Correct 339 ms 20220 KB Output is correct
4 Correct 339 ms 20044 KB Output is correct
5 Correct 339 ms 20088 KB Output is correct
6 Correct 339 ms 20228 KB Output is correct
7 Correct 339 ms 20088 KB Output is correct
8 Correct 339 ms 20088 KB Output is correct
9 Correct 339 ms 20196 KB Output is correct
10 Correct 343 ms 20088 KB Output is correct
11 Correct 339 ms 20160 KB Output is correct
12 Correct 338 ms 20120 KB Output is correct
13 Correct 342 ms 20216 KB Output is correct
14 Correct 344 ms 20232 KB Output is correct
15 Correct 339 ms 20060 KB Output is correct
16 Correct 65 ms 5880 KB Output is correct
17 Correct 69 ms 6328 KB Output is correct
18 Correct 67 ms 6136 KB Output is correct
19 Correct 70 ms 6108 KB Output is correct
20 Correct 68 ms 6008 KB Output is correct

Subtask #2
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 347 ms 20216 KB Output is correct
2 Correct 344 ms 20272 KB Output is correct
3 Correct 339 ms 20220 KB Output is correct
4 Correct 339 ms 20044 KB Output is correct
5 Correct 339 ms 20088 KB Output is correct
6 Correct 339 ms 20228 KB Output is correct
7 Correct 339 ms 20088 KB Output is correct
8 Correct 339 ms 20088 KB Output is correct
9 Correct 339 ms 20196 KB Output is correct
10 Correct 343 ms 20088 KB Output is correct
11 Correct 339 ms 20160 KB Output is correct
12 Correct 338 ms 20120 KB Output is correct
13 Correct 342 ms 20216 KB Output is correct
14 Correct 344 ms 20232 KB Output is correct
15 Correct 339 ms 20060 KB Output is correct
16 Correct 65 ms 5880 KB Output is correct
17 Correct 69 ms 6328 KB Output is correct
18 Correct 67 ms 6136 KB Output is correct
19 Correct 70 ms 6108 KB Output is correct
20 Correct 68 ms 6008 KB Output is correct
21 Correct 625 ms 18820 KB Output is correct
22 Correct 617 ms 19064 KB Output is correct
23 Correct 610 ms 18680 KB Output is correct
24 Correct 616 ms 18628 KB Output is correct
25 Correct 620 ms 18680 KB Output is correct
26 Correct 697 ms 18296 KB Output is correct
27 Correct 712 ms 18532 KB Output is correct
28 Correct 693 ms 18296 KB Output is correct
29 Correct 750 ms 18172 KB Output is correct
30 Correct 340 ms 20088 KB Output is correct
31 Correct 340 ms 20204 KB Output is correct
32 Correct 340 ms 20216 KB Output is correct
33 Correct 341 ms 20216 KB Output is correct
34 Correct 346 ms 20204 KB Output is correct
35 Correct 341 ms 20088 KB Output is correct
36 Correct 341 ms 20088 KB Output is correct
37 Correct 339 ms 20188 KB Output is correct
38 Correct 341 ms 20144 KB Output is correct

Subtask #3
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 19 ms 2808 KB Output is correct
2 Correct 19 ms 2808 KB Output is correct
3 Correct 20 ms 2928 KB Output is correct
4 Correct 19 ms 2808 KB Output is correct
5 Correct 19 ms 2808 KB Output is correct
6 Correct 20 ms 2808 KB Output is correct
7 Correct 22 ms 2780 KB Output is correct
8 Correct 20 ms 2808 KB Output is correct
9 Correct 20 ms 2808 KB Output is correct
10 Correct 21 ms 2808 KB Output is correct
11 Correct 19 ms 2808 KB Output is correct
12 Correct 19 ms 2780 KB Output is correct
13 Correct 19 ms 2808 KB Output is correct
14 Correct 19 ms 2936 KB Output is correct
15 Correct 19 ms 2808 KB Output is correct
16 Correct 12 ms 2012 KB Output is correct
17 Correct 12 ms 1912 KB Output is correct
18 Correct 12 ms 1912 KB Output is correct
19 Correct 12 ms 1912 KB Output is correct
20 Correct 12 ms 1912 KB Output is correct

Subtask #4
42.0 / 42.0

# Verdict Execution time Memory Grader output
1 Correct 347 ms 20216 KB Output is correct
2 Correct 344 ms 20272 KB Output is correct
3 Correct 339 ms 20220 KB Output is correct
4 Correct 339 ms 20044 KB Output is correct
5 Correct 339 ms 20088 KB Output is correct
6 Correct 339 ms 20228 KB Output is correct
7 Correct 339 ms 20088 KB Output is correct
8 Correct 339 ms 20088 KB Output is correct
9 Correct 339 ms 20196 KB Output is correct
10 Correct 343 ms 20088 KB Output is correct
11 Correct 339 ms 20160 KB Output is correct
12 Correct 338 ms 20120 KB Output is correct
13 Correct 342 ms 20216 KB Output is correct
14 Correct 344 ms 20232 KB Output is correct
15 Correct 339 ms 20060 KB Output is correct
16 Correct 65 ms 5880 KB Output is correct
17 Correct 69 ms 6328 KB Output is correct
18 Correct 67 ms 6136 KB Output is correct
19 Correct 70 ms 6108 KB Output is correct
20 Correct 68 ms 6008 KB Output is correct
21 Correct 625 ms 18820 KB Output is correct
22 Correct 617 ms 19064 KB Output is correct
23 Correct 610 ms 18680 KB Output is correct
24 Correct 616 ms 18628 KB Output is correct
25 Correct 620 ms 18680 KB Output is correct
26 Correct 697 ms 18296 KB Output is correct
27 Correct 712 ms 18532 KB Output is correct
28 Correct 693 ms 18296 KB Output is correct
29 Correct 750 ms 18172 KB Output is correct
30 Correct 340 ms 20088 KB Output is correct
31 Correct 340 ms 20204 KB Output is correct
32 Correct 340 ms 20216 KB Output is correct
33 Correct 341 ms 20216 KB Output is correct
34 Correct 346 ms 20204 KB Output is correct
35 Correct 341 ms 20088 KB Output is correct
36 Correct 341 ms 20088 KB Output is correct
37 Correct 339 ms 20188 KB Output is correct
38 Correct 341 ms 20144 KB Output is correct
39 Correct 19 ms 2808 KB Output is correct
40 Correct 19 ms 2808 KB Output is correct
41 Correct 20 ms 2928 KB Output is correct
42 Correct 19 ms 2808 KB Output is correct
43 Correct 19 ms 2808 KB Output is correct
44 Correct 20 ms 2808 KB Output is correct
45 Correct 22 ms 2780 KB Output is correct
46 Correct 20 ms 2808 KB Output is correct
47 Correct 20 ms 2808 KB Output is correct
48 Correct 21 ms 2808 KB Output is correct
49 Correct 19 ms 2808 KB Output is correct
50 Correct 19 ms 2780 KB Output is correct
51 Correct 19 ms 2808 KB Output is correct
52 Correct 19 ms 2936 KB Output is correct
53 Correct 19 ms 2808 KB Output is correct
54 Correct 12 ms 2012 KB Output is correct
55 Correct 12 ms 1912 KB Output is correct
56 Correct 12 ms 1912 KB Output is correct
57 Correct 12 ms 1912 KB Output is correct
58 Correct 12 ms 1912 KB Output is correct
59 Correct 668 ms 20240 KB Output is correct
60 Correct 662 ms 20248 KB Output is correct
61 Correct 644 ms 20216 KB Output is correct
62 Correct 668 ms 20216 KB Output is correct
63 Correct 656 ms 20216 KB Output is correct
64 Correct 798 ms 20316 KB Output is correct
65 Correct 816 ms 20216 KB Output is correct
66 Correct 799 ms 20216 KB Output is correct
67 Correct 811 ms 20268 KB Output is correct
68 Correct 795 ms 20216 KB Output is correct
69 Correct 573 ms 20216 KB Output is correct
70 Correct 578 ms 20148 KB Output is correct
71 Correct 582 ms 20216 KB Output is correct
72 Correct 575 ms 20144 KB Output is correct
73 Correct 579 ms 20216 KB Output is correct
74 Correct 123 ms 6008 KB Output is correct
75 Correct 121 ms 6008 KB Output is correct
76 Correct 125 ms 6116 KB Output is correct
77 Correct 124 ms 6032 KB Output is correct
78 Correct 123 ms 5980 KB Output is correct