oj.uz

답안 #499181

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
499181 2021-12-27T12:00:18 Z dooompy Skyscraper (JOI16_skyscraper) C++17
100 / 100
 255 ms 84284 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 val = 0; val <= l; ++val) for (int j = 0; j < 3; ++j) for (int cc = 1; cc < n; ++cc) {
        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

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 0 ms 460 KB Output is correct
5 Correct 1 ms 716 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

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 972 KB Output is correct
2 Correct 1 ms 972 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

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 0 ms 460 KB Output is correct
5 Correct 1 ms 716 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 972 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 233 ms 71224 KB Output is correct
23 Correct 239 ms 69160 KB Output is correct
24 Correct 223 ms 78020 KB Output is correct
25 Correct 241 ms 70596 KB Output is correct
26 Correct 222 ms 69232 KB Output is correct
27 Correct 99 ms 57816 KB Output is correct
28 Correct 126 ms 64396 KB Output is correct
29 Correct 219 ms 84284 KB Output is correct
30 Correct 255 ms 70268 KB Output is correct