oj.uz

Submission #492253

# Submission time Handle Problem Language Result Execution time Memory
492253 2021-12-06T09:30:58 Z abc864197532 Skyscraper (JOI16_skyscraper) C++17
100 / 100
 262 ms 84492 KB 
#include <bits/stdc++.h>
using namespace std;
#define lli long long int
#define mp make_pair
#define pb push_back
#define eb emplace_back
#define pii pair <int, int>
#define X first
#define Y second
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
void abc() {cout << endl;}
template <typename T, typename ...U> void abc(T a, U ...b) {
    cout << a << ' ', abc(b...);
}
template <typename T> void printv(T l, T r) {
    while (l != r) cout << *l << " \n"[++l == r];
}
template <typename A, typename B> istream& operator >> (istream& o, pair<A, B> &a) {
    return o >> a.X >> a.Y;
}
template <typename A, typename B> ostream& operator << (ostream& o, pair<A, B> a) {
    return o << '(' << a.X << ", " << a.Y << ')';
}
template <typename T> ostream& operator << (ostream& o, vector<T> a) {
    bool is = false;
    for (T i : a) {o << (is ? ' ' : '{'), is = true, o << i;}
    return o << '}';
}
template <typename T> struct vv : vector <vector <T>> {
    vv(int n, int m, T v) : vector <vector <T>> (n, vector <T>(m, v)) {}
    vv() {}
};
template <typename T> struct vvv : vector <vv <T>> {
    vvv(int n, int m, int k, T v) : vector <vv <T>> (n, vv <T>(m, k, v)) {}
    vvv() {}
};
#ifdef Doludu
#define test(args...) abc("[" + string(#args) + "]", args)
#define owo freopen("input.txt", "r", stdin), freopen("output.txt", "w", stdout)
#else
#define test(args...) void(0)
#define owo ios::sync_with_stdio(false); cin.tie(0)
#endif
const int mod = 1e9 + 7, N = 200001, logC = 30;

int dp[101][101][1001][3];

void add(int &i, int j) {
    i += j;
    if (i >= mod)
        i -= mod;
}

int main () {
    owo;
    int n, l;
    cin >> n >> l;
    vector <int> a(n);
    for (int i = 0; i < n; ++i) {
        cin >> a[i];
    }
    if (n == 1) {
        cout << 1 << endl;
        return 0;
    }
    sort(all(a));
    dp[1][1][0][0] = 1;
    dp[1][1][0][1] = 2;
    for (int i = 1; i < n; ++i) for (int cc = 1; cc < n; ++cc) for (int val = 0; val <= l; ++val) for (int j = 0; j < 3; ++j) {
        int nxtcost = val + (a[i] - a[i - 1]) * (cc * 2 - j);
        if (nxtcost > l)
            continue;
        test(nxtcost);
        if (dp[i][cc][val][j])
            test(i, cc, val, j, dp[i][cc][val][j]);
        // add one group
        add(dp[i + 1][cc + 1][nxtcost][j], 1ll * dp[i][cc][val][j] * (cc + 1 - j) % mod);
        // append to one's end
        add(dp[i + 1][cc][nxtcost][j], 1ll * dp[i][cc][val][j] * (cc * 2 - j) % mod);
        // glue two cc
        add(dp[i + 1][cc - 1][nxtcost][j], 1ll * dp[i][cc][val][j] * (cc - 1) % mod);
        // put one side
        if (j < 2) {
            // add one group
            add(dp[i + 1][cc + 1][nxtcost][j + 1], dp[i][cc][val][j] * (j ? 1 : 2) % mod);
            // append to one's end
            add(dp[i + 1][cc][nxtcost][j + 1], dp[i][cc][val][j] * (j ? 1 : 2) % mod);
        }
    }
    int ans = 0;
    for (int i = 0; i <= l; ++i)
        add(ans, dp[n][1][i][2]), test(i, dp[n][1][i][2]);
    cout << ans << endl;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 460 KB Output is correct
5 Correct 2 ms 844 KB Output is correct
6 Correct 2 ms 844 KB Output is correct
7 Correct 1 ms 588 KB Output is correct
8 Correct 1 ms 588 KB Output is correct
9 Correct 2 ms 844 KB Output is correct
10 Correct 1 ms 588 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 972 KB Output is correct
2 Correct 1 ms 1036 KB Output is correct
3 Correct 1 ms 1100 KB Output is correct
4 Correct 1 ms 972 KB Output is correct
5 Correct 1 ms 972 KB Output is correct
6 Correct 1 ms 1100 KB Output is correct
7 Correct 1 ms 844 KB Output is correct
8 Correct 1 ms 1100 KB Output is correct
9 Correct 1 ms 1228 KB Output is correct
10 Correct 1 ms 972 KB Output is correct

Subtask #3
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 460 KB Output is correct
5 Correct 2 ms 844 KB Output is correct
6 Correct 2 ms 844 KB Output is correct
7 Correct 1 ms 588 KB Output is correct
8 Correct 1 ms 588 KB Output is correct
9 Correct 2 ms 844 KB Output is correct
10 Correct 1 ms 588 KB Output is correct
11 Correct 1 ms 972 KB Output is correct
12 Correct 1 ms 1036 KB Output is correct
13 Correct 1 ms 1100 KB Output is correct
14 Correct 1 ms 972 KB Output is correct
15 Correct 1 ms 972 KB Output is correct
16 Correct 1 ms 1100 KB Output is correct
17 Correct 1 ms 844 KB Output is correct
18 Correct 1 ms 1100 KB Output is correct
19 Correct 1 ms 1228 KB Output is correct
20 Correct 1 ms 972 KB Output is correct
21 Correct 3 ms 4044 KB Output is correct
22 Correct 251 ms 71236 KB Output is correct
23 Correct 247 ms 69188 KB Output is correct
24 Correct 236 ms 78052 KB Output is correct
25 Correct 262 ms 70656 KB Output is correct
26 Correct 225 ms 69204 KB Output is correct
27 Correct 114 ms 57788 KB Output is correct
28 Correct 132 ms 64324 KB Output is correct
29 Correct 241 ms 84492 KB Output is correct
30 Correct 256 ms 70316 KB Output is correct