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답안 #1037536

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1037536 2024-07-29T03:28:34 Z RiverFlow Binaria (CCO23_day1problem1) C++14
14 / 25
 211 ms 116816 KB 
#include <bits/stdc++.h>

#define nl "\n"
#define no "NO"
#define yes "YES"
#define fi first
#define se second
#define vec vector
#define task "main"
#define _mp make_pair
#define ii pair<int, int>
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define evoid(val) return void(std::cout << val)
#define FOR(i, a, b) for(int i = (a); i <= (b); ++i)
#define FOD(i, b, a) for(int i = (b); i >= (a); --i)
#define unq(x) sort(all(x)); x.resize(unique(all(x)) - x.begin())

using namespace std;

template<typename U, typename V> bool maxi(U &a, V b) {
    if (a < b) { a = b; return 1; } return 0;
}
template<typename U, typename V> bool mini(U &a, V b) {
    if (a > b) { a = b; return 1; } return 0;
}

const int N = (int)1e6 + 9;
const int mod = (int)1e9 + 7;

void prepare(); void main_code();

int main() {
    ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    if (fopen(task".inp", "r")) {
        freopen(task".inp", "r", stdin);
        freopen(task".out", "w", stdout);
    }
    const bool MULTITEST = 0; prepare();
    int num_test = 1; if (MULTITEST) cin >> num_test;
    while (num_test--) { main_code(); }
}

void prepare() {};

vector<int> g[N];
int a[N], id[N];
bool vis[N];

bool dfs(int u) {
    vis[u] = 1;
    for(int v : g[u]) {
        if (id[v] == (id[u] ^ 1)) {
            return 1;
        }
        if (!vis[v]) {
            id[v] = id[u];
            if (dfs(v)) return 1;
        }
    }

    return 0;
}

int Pow(int a, long long b) {
    int res = 1;
    for(; b > 0; b >>= 1, a = 1ll * a * a % mod)
        if (b & 1) res = 1ll * res * a % mod;
    return res;
}
int add(int a, int b) { return a + b < mod ? a + b : a + b - mod; }
int sub(int a, int b) { return a >= b ? a - b : a - b + mod; }
int mul(int a, int b) { return 1LL * a * b % mod; }
void main_code() {
    int n, k; cin >> n >> k;
    for(int i = 1; i <= n; ++i) cin >> a[i + k - 1];
    memset(id, -1, sizeof id);
    for(int i = k + 1; i <= n; ++i) {
        if (abs(a[i] - a[i - 1]) > 1) evoid(0);
        if (a[i - 1] == a[i] - 1) {
            if (id[i - k] == 1) evoid(0);
            id[i - k] = 0, id[i] = 1;
        } else if (a[i - 1] == a[i] + 1) {
            if (id[i - k] == 0) evoid(0);
            id[i - k] = 1, id[i] = 0;
        } else {
            g[i].push_back(i - k);
            g[i - k].push_back(i);
        }
    }
    for(int i = 1; i <= n; ++i) if (!vis[i] and id[i] != -1) {
        if (dfs(i)) evoid(0);
    }
//    FOR(i, 1, n) cout << id[i] << ' ';

    int sum = 0;
    FOR(i, 1, k) {
        if (id[i] != -1) sum += id[i];
    }
    int f = a[k] - sum;
    if (f < 0) evoid(0);
    FOR(i, k + 1, n) {
        if (id[i-k]!=-1)
            sum-=id[i-k];
        if (id[i]!=-1)
            sum+=id[i];
        if (a[i]-sum != f)evoid(0);
    }
    // dem so bit
    int t=0;
    FOR(i, 1, k) if (id[i]==-1)++t;
    // C(f, t)
    // t! / f! * (t-f)!
    vector<int> P(n+1,0);
    P[0]=1;
    FOR(i,1,n)P[i]=1LL*P[i-1]*i%mod;
    if (t<f)evoid(0);
    cout << mul(P[t], Pow(mul(P[f], P[t-f]) , mod-2));
}


/*     Let the river flows naturally     */

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:36:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   36 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:37:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |         freopen(task".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
3.0 / 3.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 30300 KB Output is correct
2 Correct 4 ms 30300 KB Output is correct
3 Correct 5 ms 30300 KB Output is correct
4 Correct 5 ms 30300 KB Output is correct
5 Correct 5 ms 30552 KB Output is correct
6 Correct 7 ms 30516 KB Output is correct
7 Correct 5 ms 30300 KB Output is correct
8 Correct 5 ms 30300 KB Output is correct
9 Correct 4 ms 30408 KB Output is correct
10 Correct 5 ms 30404 KB Output is correct
11 Correct 7 ms 30556 KB Output is correct
12 Correct 5 ms 30300 KB Output is correct

Subtask #2
3.0 / 3.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 30300 KB Output is correct
2 Correct 4 ms 30300 KB Output is correct
3 Correct 5 ms 30300 KB Output is correct
4 Correct 5 ms 30300 KB Output is correct
5 Correct 5 ms 30552 KB Output is correct
6 Correct 7 ms 30516 KB Output is correct
7 Correct 5 ms 30300 KB Output is correct
8 Correct 5 ms 30300 KB Output is correct
9 Correct 4 ms 30408 KB Output is correct
10 Correct 5 ms 30404 KB Output is correct
11 Correct 7 ms 30556 KB Output is correct
12 Correct 5 ms 30300 KB Output is correct
13 Correct 4 ms 30300 KB Output is correct
14 Correct 5 ms 30300 KB Output is correct
15 Correct 4 ms 30300 KB Output is correct
16 Correct 5 ms 30296 KB Output is correct
17 Correct 5 ms 30300 KB Output is correct
18 Correct 4 ms 30300 KB Output is correct
19 Correct 5 ms 30300 KB Output is correct
20 Correct 5 ms 30300 KB Output is correct
21 Correct 5 ms 30300 KB Output is correct

Subtask #3
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 30300 KB Output is correct
2 Correct 4 ms 30300 KB Output is correct
3 Correct 5 ms 30300 KB Output is correct
4 Correct 5 ms 30300 KB Output is correct
5 Correct 5 ms 30552 KB Output is correct
6 Correct 7 ms 30516 KB Output is correct
7 Correct 5 ms 30300 KB Output is correct
8 Correct 5 ms 30300 KB Output is correct
9 Correct 4 ms 30408 KB Output is correct
10 Correct 5 ms 30404 KB Output is correct
11 Correct 7 ms 30556 KB Output is correct
12 Correct 5 ms 30300 KB Output is correct
13 Correct 4 ms 30300 KB Output is correct
14 Correct 5 ms 30300 KB Output is correct
15 Correct 4 ms 30300 KB Output is correct
16 Correct 5 ms 30296 KB Output is correct
17 Correct 5 ms 30300 KB Output is correct
18 Correct 4 ms 30300 KB Output is correct
19 Correct 5 ms 30300 KB Output is correct
20 Correct 5 ms 30300 KB Output is correct
21 Correct 5 ms 30300 KB Output is correct
22 Correct 5 ms 30300 KB Output is correct
23 Correct 5 ms 30300 KB Output is correct
24 Correct 5 ms 30300 KB Output is correct
25 Correct 5 ms 30300 KB Output is correct
26 Correct 5 ms 30416 KB Output is correct
27 Correct 5 ms 30316 KB Output is correct
28 Correct 5 ms 30416 KB Output is correct
29 Correct 5 ms 30552 KB Output is correct
30 Correct 5 ms 30300 KB Output is correct
31 Correct 5 ms 30300 KB Output is correct
32 Correct 5 ms 30300 KB Output is correct
33 Correct 4 ms 30408 KB Output is correct
34 Correct 5 ms 30556 KB Output is correct

Subtask #4
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 30300 KB Output is correct
2 Correct 4 ms 30300 KB Output is correct
3 Correct 5 ms 30300 KB Output is correct
4 Correct 5 ms 30300 KB Output is correct
5 Correct 5 ms 30552 KB Output is correct
6 Correct 7 ms 30516 KB Output is correct
7 Correct 5 ms 30300 KB Output is correct
8 Correct 5 ms 30300 KB Output is correct
9 Correct 4 ms 30408 KB Output is correct
10 Correct 5 ms 30404 KB Output is correct
11 Correct 7 ms 30556 KB Output is correct
12 Correct 5 ms 30300 KB Output is correct
13 Correct 4 ms 30300 KB Output is correct
14 Correct 5 ms 30300 KB Output is correct
15 Correct 4 ms 30300 KB Output is correct
16 Correct 5 ms 30296 KB Output is correct
17 Correct 5 ms 30300 KB Output is correct
18 Correct 4 ms 30300 KB Output is correct
19 Correct 5 ms 30300 KB Output is correct
20 Correct 5 ms 30300 KB Output is correct
21 Correct 5 ms 30300 KB Output is correct
22 Correct 5 ms 30300 KB Output is correct
23 Correct 5 ms 30300 KB Output is correct
24 Correct 5 ms 30300 KB Output is correct
25 Correct 5 ms 30300 KB Output is correct
26 Correct 5 ms 30416 KB Output is correct
27 Correct 5 ms 30316 KB Output is correct
28 Correct 5 ms 30416 KB Output is correct
29 Correct 5 ms 30552 KB Output is correct
30 Correct 5 ms 30300 KB Output is correct
31 Correct 5 ms 30300 KB Output is correct
32 Correct 5 ms 30300 KB Output is correct
33 Correct 4 ms 30408 KB Output is correct
34 Correct 5 ms 30556 KB Output is correct
35 Correct 99 ms 67700 KB Output is correct
36 Correct 211 ms 70484 KB Output is correct
37 Correct 177 ms 71968 KB Output is correct
38 Correct 116 ms 72588 KB Output is correct
39 Correct 106 ms 69660 KB Output is correct
40 Correct 102 ms 70480 KB Output is correct
41 Correct 187 ms 72380 KB Output is correct
42 Correct 121 ms 72272 KB Output is correct
43 Correct 117 ms 72016 KB Output is correct
44 Correct 98 ms 69656 KB Output is correct
45 Correct 141 ms 116816 KB Output is correct
46 Correct 98 ms 69716 KB Output is correct
47 Correct 105 ms 69716 KB Output is correct
48 Correct 105 ms 70484 KB Output is correct
49 Correct 111 ms 73220 KB Output is correct

Subtask #5
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 30300 KB Output is correct
2 Correct 4 ms 30300 KB Output is correct
3 Correct 5 ms 30300 KB Output is correct
4 Correct 5 ms 30300 KB Output is correct
5 Correct 5 ms 30552 KB Output is correct
6 Correct 7 ms 30516 KB Output is correct
7 Correct 5 ms 30300 KB Output is correct
8 Correct 5 ms 30300 KB Output is correct
9 Correct 4 ms 30408 KB Output is correct
10 Correct 5 ms 30404 KB Output is correct
11 Correct 7 ms 30556 KB Output is correct
12 Correct 5 ms 30300 KB Output is correct
13 Correct 4 ms 30300 KB Output is correct
14 Correct 5 ms 30300 KB Output is correct
15 Correct 4 ms 30300 KB Output is correct
16 Correct 5 ms 30296 KB Output is correct
17 Correct 5 ms 30300 KB Output is correct
18 Correct 4 ms 30300 KB Output is correct
19 Correct 5 ms 30300 KB Output is correct
20 Correct 5 ms 30300 KB Output is correct
21 Correct 5 ms 30300 KB Output is correct
22 Correct 5 ms 30300 KB Output is correct
23 Correct 5 ms 30300 KB Output is correct
24 Correct 5 ms 30300 KB Output is correct
25 Correct 5 ms 30300 KB Output is correct
26 Correct 5 ms 30416 KB Output is correct
27 Correct 5 ms 30316 KB Output is correct
28 Correct 5 ms 30416 KB Output is correct
29 Correct 5 ms 30552 KB Output is correct
30 Correct 5 ms 30300 KB Output is correct
31 Correct 5 ms 30300 KB Output is correct
32 Correct 5 ms 30300 KB Output is correct
33 Correct 4 ms 30408 KB Output is correct
34 Correct 5 ms 30556 KB Output is correct
35 Correct 99 ms 67700 KB Output is correct
36 Correct 211 ms 70484 KB Output is correct
37 Correct 177 ms 71968 KB Output is correct
38 Correct 116 ms 72588 KB Output is correct
39 Correct 106 ms 69660 KB Output is correct
40 Correct 102 ms 70480 KB Output is correct
41 Correct 187 ms 72380 KB Output is correct
42 Correct 121 ms 72272 KB Output is correct
43 Correct 117 ms 72016 KB Output is correct
44 Correct 98 ms 69656 KB Output is correct
45 Correct 141 ms 116816 KB Output is correct
46 Correct 98 ms 69716 KB Output is correct
47 Correct 105 ms 69716 KB Output is correct
48 Correct 105 ms 70484 KB Output is correct
49 Correct 111 ms 73220 KB Output is correct
50 Incorrect 109 ms 72456 KB Output isn't correct
51 Halted 0 ms 0 KB -

Subtask #6
0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 30300 KB Output is correct
2 Correct 4 ms 30300 KB Output is correct
3 Correct 5 ms 30300 KB Output is correct
4 Correct 5 ms 30300 KB Output is correct
5 Correct 5 ms 30552 KB Output is correct
6 Correct 7 ms 30516 KB Output is correct
7 Correct 5 ms 30300 KB Output is correct
8 Correct 5 ms 30300 KB Output is correct
9 Correct 4 ms 30408 KB Output is correct
10 Correct 5 ms 30404 KB Output is correct
11 Correct 7 ms 30556 KB Output is correct
12 Correct 5 ms 30300 KB Output is correct
13 Correct 4 ms 30300 KB Output is correct
14 Correct 5 ms 30300 KB Output is correct
15 Correct 4 ms 30300 KB Output is correct
16 Correct 5 ms 30296 KB Output is correct
17 Correct 5 ms 30300 KB Output is correct
18 Correct 4 ms 30300 KB Output is correct
19 Correct 5 ms 30300 KB Output is correct
20 Correct 5 ms 30300 KB Output is correct
21 Correct 5 ms 30300 KB Output is correct
22 Correct 5 ms 30300 KB Output is correct
23 Correct 5 ms 30300 KB Output is correct
24 Correct 5 ms 30300 KB Output is correct
25 Correct 5 ms 30300 KB Output is correct
26 Correct 5 ms 30416 KB Output is correct
27 Correct 5 ms 30316 KB Output is correct
28 Correct 5 ms 30416 KB Output is correct
29 Correct 5 ms 30552 KB Output is correct
30 Correct 5 ms 30300 KB Output is correct
31 Correct 5 ms 30300 KB Output is correct
32 Correct 5 ms 30300 KB Output is correct
33 Correct 4 ms 30408 KB Output is correct
34 Correct 5 ms 30556 KB Output is correct
35 Correct 99 ms 67700 KB Output is correct
36 Correct 211 ms 70484 KB Output is correct
37 Correct 177 ms 71968 KB Output is correct
38 Correct 116 ms 72588 KB Output is correct
39 Correct 106 ms 69660 KB Output is correct
40 Correct 102 ms 70480 KB Output is correct
41 Correct 187 ms 72380 KB Output is correct
42 Correct 121 ms 72272 KB Output is correct
43 Correct 117 ms 72016 KB Output is correct
44 Correct 98 ms 69656 KB Output is correct
45 Correct 141 ms 116816 KB Output is correct
46 Correct 98 ms 69716 KB Output is correct
47 Correct 105 ms 69716 KB Output is correct
48 Correct 105 ms 70484 KB Output is correct
49 Correct 111 ms 73220 KB Output is correct
50 Incorrect 109 ms 72456 KB Output isn't correct
51 Halted 0 ms 0 KB -