Submission #582744

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
582744	2022-06-24T11:12:33 Z	elkernos	Tents (JOI18_tents)	C++17	100 / 100	124 ms	70916 KB

tents

#include <bits/stdc++.h>

using namespace std;

const int mod = 1000 * 1000 * 1000 + 7;

int main()
{
    cin.tie(nullptr)->sync_with_stdio(0);
    int h, w;
    cin >> h >> w;
    vector<vector<long long>> dp(h + 1, vector<long long>(w + 1));
    auto C2 = [](int x) {
        return x * (x - 1) / 2;
    };
    for(int i = 0; i <= h; i++) {
        for(int j = 0; j <= w; j++) {
            if(i == 0 || j == 0) {
                dp[i][j] = 1;
                continue;
            }
            dp[i][j] += dp[i][j - 1];
            dp[i][j] += 4ll * i * dp[i - 1][j - 1];
            if(i >= 2) {
                dp[i][j] += C2(i) * dp[i - 2][j - 1];
            }
            if(j >= 2) {
                dp[i][j] += i * (j - 1) * dp[i - 1][j - 2];
            }
            dp[i][j] %= mod;
        }
    }
    cout << (dp[h][w] - 1 + mod) % mod << "\n";
}

Subtask #1

48.0 / 48.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	212 KB	Output is correct
2	Correct	1 ms	212 KB	Output is correct
3	Correct	0 ms	316 KB	Output is correct
4	Correct	0 ms	212 KB	Output is correct
5	Correct	1 ms	340 KB	Output is correct
6	Correct	1 ms	468 KB	Output is correct
7	Correct	1 ms	468 KB	Output is correct
8	Correct	1 ms	456 KB	Output is correct
9	Correct	1 ms	212 KB	Output is correct
10	Correct	1 ms	596 KB	Output is correct
11	Correct	1 ms	340 KB	Output is correct
12	Correct	2 ms	980 KB	Output is correct

Subtask #2

52.0 / 52.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	212 KB	Output is correct
2	Correct	1 ms	212 KB	Output is correct
3	Correct	0 ms	316 KB	Output is correct
4	Correct	0 ms	212 KB	Output is correct
5	Correct	1 ms	340 KB	Output is correct
6	Correct	1 ms	468 KB	Output is correct
7	Correct	1 ms	468 KB	Output is correct
8	Correct	1 ms	456 KB	Output is correct
9	Correct	1 ms	212 KB	Output is correct
10	Correct	1 ms	596 KB	Output is correct
11	Correct	1 ms	340 KB	Output is correct
12	Correct	2 ms	980 KB	Output is correct
13	Correct	1 ms	340 KB	Output is correct
14	Correct	1 ms	444 KB	Output is correct
15	Correct	70 ms	44192 KB	Output is correct
16	Correct	5 ms	3028 KB	Output is correct
17	Correct	16 ms	10068 KB	Output is correct
18	Correct	22 ms	12508 KB	Output is correct
19	Correct	95 ms	51468 KB	Output is correct
20	Correct	70 ms	41188 KB	Output is correct
21	Correct	52 ms	27164 KB	Output is correct
22	Correct	45 ms	26836 KB	Output is correct
23	Correct	26 ms	15060 KB	Output is correct
24	Correct	119 ms	70916 KB	Output is correct
25	Correct	85 ms	52672 KB	Output is correct
26	Correct	102 ms	60384 KB	Output is correct
27	Correct	124 ms	68168 KB	Output is correct