oj.uz

Submission #1033938

# Submission time Handle Problem Language Result Execution time Memory
1033938 2024-07-25T07:57:29 Z vjudge1 Tents (JOI18_tents) C++17
100 / 100
 114 ms 70964 KB 
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#include <bits/stdc++.h>
using namespace std;
#define int long long
// #define double long double
 
#define endl '\n'
#define fastIO ios_base::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr);
#define setmin(x, y) x = min((x), (y))
#define setmax(x, y) x = max((x), (y))
#define sqr(x) ((x) * (x))
#define fi first
#define se second
#define all(x) x.begin(), x.end()
 
// mt19937 hdp(chrono::high_resolution_clock::now().time_since_epoch().count());
// int rand(int l, int r){return l + ((hdp() % (r - l + 1)) + r - l + 1) % (r - l + 1);}

const int NM = 3e3 + 5;
const int mod = 1e9 + 7;

int w, h, f[NM][NM];

signed main()
{
    fastIO
    if (fopen("in.txt", "r")) 
    {
        freopen("in.txt", "r", stdin);
        freopen("out.txt", "w", stdout);
    }
    cin >> w >> h;
    for (int i = 0; i <= h; i++)
        f[0][i] = 1;
    for (int i = 1; i <= w; i++)
        for (int j = 0; j <= h; j++)
        {
            f[i][j] = f[i - 1][j - 1] * 4ll * j % mod;
            f[i][j] = (f[i][j] + f[i - 1][j]) % mod;
            if (j > 1 && i)
                f[i][j] = (f[i][j] + f[i - 1][j - 2] * ((j * (j - 1) / 2) % mod) % mod) % mod;
            if (i > 1 && j)
                f[i][j] = (f[i][j] + f[i - 2][j - 1] * j % mod * (i - 1) % mod) % mod;
        }
    cout << (f[w][h] + mod - 1) % mod << endl;
}

Compilation message

tents.cpp: In function 'int main()':
tents.cpp:30:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |         freopen("in.txt", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
tents.cpp:31:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   31 |         freopen("out.txt", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
48.0 / 48.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 604 KB Output is correct
4 Correct 1 ms 1116 KB Output is correct
5 Correct 1 ms 604 KB Output is correct
6 Correct 1 ms 1536 KB Output is correct
7 Correct 1 ms 860 KB Output is correct
8 Correct 1 ms 1372 KB Output is correct
9 Correct 1 ms 856 KB Output is correct
10 Correct 1 ms 1884 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 2 ms 2140 KB Output is correct

Subtask #2
52.0 / 52.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 604 KB Output is correct
4 Correct 1 ms 1116 KB Output is correct
5 Correct 1 ms 604 KB Output is correct
6 Correct 1 ms 1536 KB Output is correct
7 Correct 1 ms 860 KB Output is correct
8 Correct 1 ms 1372 KB Output is correct
9 Correct 1 ms 856 KB Output is correct
10 Correct 1 ms 1884 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 2 ms 2140 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 3 ms 9564 KB Output is correct
15 Correct 75 ms 55124 KB Output is correct
16 Correct 5 ms 4188 KB Output is correct
17 Correct 17 ms 12892 KB Output is correct
18 Correct 21 ms 16988 KB Output is correct
19 Correct 86 ms 63060 KB Output is correct
20 Correct 68 ms 51040 KB Output is correct
21 Correct 49 ms 33964 KB Output is correct
22 Correct 54 ms 35364 KB Output is correct
23 Correct 33 ms 27228 KB Output is correct
24 Correct 114 ms 70964 KB Output is correct
25 Correct 87 ms 61268 KB Output is correct
26 Correct 105 ms 66620 KB Output is correct
27 Correct 111 ms 69036 KB Output is correct