oj.uz

답안 #530352

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
530352 2022-02-25T07:45:30 Z Servus2022 Zapina (COCI20_zapina) C++14
110 / 110
 263 ms 3224 KB 
#include <bits/stdc++.h>

using namespace std;

constexpr int NMAX = 355;
constexpr int MOD = 1e9 + 7;

int N;

int dp_not_Good[NMAX][NMAX];
int dp_Total[NMAX][NMAX];
int Comb[2*NMAX][2*NMAX];

void Read () {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    cin >> N;
}

void Precalculare () {
    Comb[0][0] = 1;

    for (int i = 1; i <= 2*N; ++ i ) {
        Comb[i][0] = 1;

        for (int j = 1; j <= i; ++ j )
            Comb[i][j] = (Comb[i-1][j-1] + Comb[i-1][j]) % MOD;
    }
}

void Solve () {
    dp_not_Good[0][0] = 1;
    dp_Total[0][0] = 1;

    for (int i = 1; i <= N; ++ i ) {
        for (int j = 0; j <= N; ++ j ) {
            for (int cnt = 0; cnt <= j; ++ cnt ) {
                if (cnt == i) continue;

                dp_not_Good[i][j] = (1LL * dp_not_Good[i][j] + 1LL * Comb[j][cnt] * dp_not_Good[i-1][j-cnt]) % MOD;
            }

            for (int cnt = 0; cnt <= j; ++ cnt )
                dp_Total[i][j] = (1LL * dp_Total[i][j] + 1LL * Comb[j][cnt] * dp_Total[i-1][j-cnt]) % MOD;
        }
    }

    cout << (dp_Total[N][N] - dp_not_Good[N][N] + MOD) % MOD << '\n';
}

int main () {
    Read();
    Precalculare();
    Solve();

    return 0;
}

Subtask #1
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 328 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 324 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 1 ms 336 KB Output is correct

Subtask #2
33.0 / 33.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 328 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 324 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 1 ms 336 KB Output is correct
6 Correct 1 ms 328 KB Output is correct
7 Correct 1 ms 360 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 336 KB Output is correct
10 Correct 1 ms 336 KB Output is correct
11 Correct 1 ms 336 KB Output is correct
12 Correct 1 ms 460 KB Output is correct
13 Correct 1 ms 464 KB Output is correct
14 Correct 1 ms 464 KB Output is correct
15 Correct 1 ms 464 KB Output is correct
16 Correct 1 ms 464 KB Output is correct

Subtask #3
55.0 / 55.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 328 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 324 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 1 ms 336 KB Output is correct
6 Correct 1 ms 328 KB Output is correct
7 Correct 1 ms 360 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 336 KB Output is correct
10 Correct 1 ms 336 KB Output is correct
11 Correct 1 ms 336 KB Output is correct
12 Correct 1 ms 460 KB Output is correct
13 Correct 1 ms 464 KB Output is correct
14 Correct 1 ms 464 KB Output is correct
15 Correct 1 ms 464 KB Output is correct
16 Correct 1 ms 464 KB Output is correct
17 Correct 116 ms 2520 KB Output is correct
18 Correct 1 ms 720 KB Output is correct
19 Correct 27 ms 1628 KB Output is correct
20 Correct 1 ms 464 KB Output is correct
21 Correct 164 ms 2840 KB Output is correct
22 Correct 19 ms 1428 KB Output is correct
23 Correct 2 ms 840 KB Output is correct
24 Correct 32 ms 1768 KB Output is correct
25 Correct 24 ms 1552 KB Output is correct
26 Correct 46 ms 1952 KB Output is correct
27 Correct 226 ms 3080 KB Output is correct
28 Correct 230 ms 3144 KB Output is correct
29 Correct 229 ms 3148 KB Output is correct
30 Correct 250 ms 3180 KB Output is correct
31 Correct 246 ms 3136 KB Output is correct
32 Correct 237 ms 3168 KB Output is correct
33 Correct 234 ms 3184 KB Output is correct
34 Correct 257 ms 3180 KB Output is correct
35 Correct 239 ms 3224 KB Output is correct
36 Correct 263 ms 3144 KB Output is correct
37 Correct 241 ms 3144 KB Output is correct