oj.uz

Submission #854788

# Submission time Handle Problem Language Result Execution time Memory
854788 2023-09-29T00:52:40 Z wakandaaa Skyscraper (JOI16_skyscraper) C++17
100 / 100
 159 ms 347728 KB 
#include <bits/stdc++.h>

using namespace std;

#define file ""

#define mp make_pair
#define fi first
#define se second
#define all(x) x.begin(), x.end()

#define getbit(x, i) (((x) >> (i)) & 1)
#define bit(x) (1LL << (x))
#define popcount __builtin_popcountll

mt19937_64 rd(chrono::steady_clock::now().time_since_epoch().count());
int rand(int l, int r) {
    return l + rd() % (r - l + 1);
}

const int N = 1e6 + 5;
const int mod = (int)1e9 + 7; // 998244353;
const int lg = 25; // lg + 1
const int oo = 1e9;
const long long ooo = 1e18;

template<class X, class Y> bool mini(X &a, Y b) {
    return a > b ? (a = b, true) : false;
}
template<class X, class Y> bool maxi(X &a, Y b) {
    return a < b ? (a = b, true) : false;
}
void add(int &a, int b) {
    a += b;
    if (a >= mod) a -= mod;
    if (a < 0) a += mod;
}

int n, L;
int a[N];
long long f[105][105][1005][2][2];

long long calc(int i, int j, int s, int l, int r) {
    // int news = s + (j * 2 + l + r) * (a[i] - a[i - 1]);
    int news = s;
    if (i > 1) news += (j * 2 + l + r) * (a[i] - a[i - 1]);
    if (news > L) return 0;
    if (j < 0) return 0;
    if (i == n) return j == 0;

    long long &res = f[i][j][s][l][r];
    if (res != -1) return res;
    res = 0;

    res += calc(i + 1, j, news, 1, r); // append to the left
    res += calc(i + 1, j - 1, news, 1, r) * j; // append to the left and merge

    res += calc(i + 1, j, news, l, 1); // append to the right
    res += calc(i + 1, j - 1, news, l, 1) * j; // append to the right and merge

    res += calc(i + 1, j + 1, news, l, r); // new one
    res += calc(i + 1, j, news, l, r) * j * 2; // append
    res += calc(i + 1, j - 1, news, l, r) * j * (j - 1); // merge

    res %= mod;
    return res;
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);

    // freopen(file".inp", "r", stdin);
    // freopen(file".out", "w", stdout);

    cin >> n >> L;
    for (int i = 1; i <= n; ++i)
        cin >> a[i];
    sort(a + 1, a + n + 1);
    a[0] = a[1];

    memset(f, -1, sizeof f);
    cout << calc(1, 0, 0, 0, 0);

    return 0;
}

/*

*/

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 37 ms 347220 KB Output is correct
2 Correct 37 ms 347360 KB Output is correct
3 Correct 37 ms 347220 KB Output is correct
4 Correct 36 ms 347216 KB Output is correct
5 Correct 37 ms 347220 KB Output is correct
6 Correct 38 ms 347220 KB Output is correct
7 Correct 37 ms 347292 KB Output is correct
8 Correct 37 ms 347216 KB Output is correct
9 Correct 38 ms 347168 KB Output is correct
10 Correct 38 ms 347220 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 39 ms 347228 KB Output is correct
2 Correct 38 ms 347216 KB Output is correct
3 Correct 37 ms 347216 KB Output is correct
4 Correct 37 ms 347388 KB Output is correct
5 Correct 38 ms 347280 KB Output is correct
6 Correct 37 ms 347156 KB Output is correct
7 Correct 38 ms 347368 KB Output is correct
8 Correct 38 ms 347328 KB Output is correct
9 Correct 38 ms 347400 KB Output is correct
10 Correct 37 ms 347216 KB Output is correct

Subtask #3
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 37 ms 347220 KB Output is correct
2 Correct 37 ms 347360 KB Output is correct
3 Correct 37 ms 347220 KB Output is correct
4 Correct 36 ms 347216 KB Output is correct
5 Correct 37 ms 347220 KB Output is correct
6 Correct 38 ms 347220 KB Output is correct
7 Correct 37 ms 347292 KB Output is correct
8 Correct 37 ms 347216 KB Output is correct
9 Correct 38 ms 347168 KB Output is correct
10 Correct 38 ms 347220 KB Output is correct
11 Correct 39 ms 347228 KB Output is correct
12 Correct 38 ms 347216 KB Output is correct
13 Correct 37 ms 347216 KB Output is correct
14 Correct 37 ms 347388 KB Output is correct
15 Correct 38 ms 347280 KB Output is correct
16 Correct 37 ms 347156 KB Output is correct
17 Correct 38 ms 347368 KB Output is correct
18 Correct 38 ms 347328 KB Output is correct
19 Correct 38 ms 347400 KB Output is correct
20 Correct 37 ms 347216 KB Output is correct
21 Correct 37 ms 347220 KB Output is correct
22 Correct 159 ms 347404 KB Output is correct
23 Correct 123 ms 347408 KB Output is correct
24 Correct 143 ms 347416 KB Output is correct
25 Correct 127 ms 347216 KB Output is correct
26 Correct 113 ms 347412 KB Output is correct
27 Correct 65 ms 347216 KB Output is correct
28 Correct 76 ms 347728 KB Output is correct
29 Correct 115 ms 347416 KB Output is correct
30 Correct 128 ms 347408 KB Output is correct