oj.uz

Submission #576082

# Submission time Handle Problem Language Result Execution time Memory
576082 2022-06-12T09:15:15 Z hoainiem Skyscraper (JOI16_skyscraper) C++14
100 / 100
 220 ms 184432 KB 
#include <bits/stdc++.h>
//#pragma GCC target("popcnt")
#define fi first
#define se second
#define lc id<<1
#define rc id<<1^1
#define val f[i][j][s][cl][cr]
const int mod = 1e9 + 7;
double begintime, endtime;
 
using namespace std;
inline void CALC_TIME()
{
    endtime = clock();
    cout << "\nexecution time : " << (endtime - begintime + 1) / 1000 << " s";
}
void add(int &x, int y)
{
    x += y;
    if (x >= mod)
        x -= mod;
}
int mul(int x, int y)
{
    return 1LL * x * y % mod;
}
typedef pair<int, int> pii;
int n, k, a[108], f[108][108][1008][2][2];
int dq(int i, int j, int s, int cl, int cr)
{
    if (s > k || (!j && i))
        return 0;
    if (val != -1)
        return val;
    if (i >= n)
        return val = (j == 1 && cl && cr);
    int res = 0;
    add(res, mul(j + 1 - cl - cr, dq(i + 1, j + 1, s + (j * 2 + 2 - cl - cr) * a[i + 1], cl, cr)));
    if (!cl)
        add(res, dq(i + 1, j + 1, s + (j * 2 + 1 - cr) * a[i + 1], 1, cr));
    if (!cr)
        add(res, dq(i + 1, j + 1, s + (j * 2 + 1 - cl) * a[i + 1], cl, 1));
    if (j > 0)
        add(res, mul(j * 2 - cl - cr, dq(i + 1, j, s + (j * 2 - cl - cr) * a[i + 1], cl, cr)));
    if (!cl)
        add(res, dq(i + 1, j, s + (j * 2 - 1 - cr) * a[i + 1], 1, cr));
    if (!cr)
        add(res, dq(i + 1, j, s + (j * 2 - 1 - cl) * a[i + 1], cl, 1));
    if (j > 1)
        add(res, mul(j - 1, dq(i + 1, j - 1, s + (j * 2 - 2 - cl - cr) * a[i + 1], cl, cr)));
    return val = res;
}   
int main()
{
    begintime = clock();
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    memset(f, -1, sizeof(f));
    cin >> n >> k;
 	if (n == 1)
    {
      cout << 1;
      return 0;
    }
    for (int i = 0; i < n; i++)
        cin >> a[i];
    sort(a, a + n);
    a[n] = 0;
    for (int i = n - 1; i > 0; i--)
        a[i] -= a[i - 1];
    a[0] = 0;
    cout << dq(0, 0, 0, 0, 0);
    return 0;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 68 ms 184328 KB Output is correct
2 Correct 72 ms 184364 KB Output is correct
3 Correct 74 ms 184292 KB Output is correct
4 Correct 78 ms 184296 KB Output is correct
5 Correct 72 ms 184260 KB Output is correct
6 Correct 69 ms 184328 KB Output is correct
7 Correct 70 ms 184368 KB Output is correct
8 Correct 71 ms 184368 KB Output is correct
9 Correct 71 ms 184268 KB Output is correct
10 Correct 79 ms 184256 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 74 ms 184328 KB Output is correct
2 Correct 71 ms 184296 KB Output is correct
3 Correct 69 ms 184360 KB Output is correct
4 Correct 73 ms 184352 KB Output is correct
5 Correct 82 ms 184340 KB Output is correct
6 Correct 70 ms 184280 KB Output is correct
7 Correct 69 ms 184356 KB Output is correct
8 Correct 71 ms 184268 KB Output is correct
9 Correct 68 ms 184320 KB Output is correct
10 Correct 82 ms 184308 KB Output is correct

Subtask #3
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 68 ms 184328 KB Output is correct
2 Correct 72 ms 184364 KB Output is correct
3 Correct 74 ms 184292 KB Output is correct
4 Correct 78 ms 184296 KB Output is correct
5 Correct 72 ms 184260 KB Output is correct
6 Correct 69 ms 184328 KB Output is correct
7 Correct 70 ms 184368 KB Output is correct
8 Correct 71 ms 184368 KB Output is correct
9 Correct 71 ms 184268 KB Output is correct
10 Correct 79 ms 184256 KB Output is correct
11 Correct 74 ms 184328 KB Output is correct
12 Correct 71 ms 184296 KB Output is correct
13 Correct 69 ms 184360 KB Output is correct
14 Correct 73 ms 184352 KB Output is correct
15 Correct 82 ms 184340 KB Output is correct
16 Correct 70 ms 184280 KB Output is correct
17 Correct 69 ms 184356 KB Output is correct
18 Correct 71 ms 184268 KB Output is correct
19 Correct 68 ms 184320 KB Output is correct
20 Correct 82 ms 184308 KB Output is correct
21 Correct 80 ms 184320 KB Output is correct
22 Correct 220 ms 184368 KB Output is correct
23 Correct 117 ms 184252 KB Output is correct
24 Correct 129 ms 184260 KB Output is correct
25 Correct 142 ms 184380 KB Output is correct
26 Correct 117 ms 184252 KB Output is correct
27 Correct 99 ms 184432 KB Output is correct
28 Correct 132 ms 184372 KB Output is correct
29 Correct 159 ms 184336 KB Output is correct
30 Correct 116 ms 184320 KB Output is correct