oj.uz

Submission #112570

# Submission time Handle Problem Language Result Execution time Memory
112570 2019-05-20T16:01:58 Z Kastanda Skyscraper (JOI16_skyscraper) C++11
100 / 100
 382 ms 3932 KB 
// I am.
#include<bits/stdc++.h>
using namespace std;
const int N = 109, L = 1009, Mod = 1e9 + 7;
int n, l, A[N], dp[N][L][2][2], dpt[N][L][2][2];
inline void Add(int j, int k, int s, int e, int val)
{
    dp[j][k][s][e] += val;
    if (dp[j][k][s][e] >= Mod)
        dp[j][k][s][e] -= Mod;
}
int main()
{
    scanf("%d%d", &n, &l);
    for (int i = 0; i < n; i ++)
        scanf("%d", &A[i]);
    sort(A, A + n);
    dp[1][0][0][0] = dp[1][0][0][1] = 1;
    dp[1][0][1][0] = dp[1][0][1][1] = 1;

    for (int i = 0; i < n - 1; i ++)
    {
        memcpy(dpt, dp, sizeof(dp));
        memset(dp, 0, sizeof(dp));
        for (int j = 1; j <= i + 1; j ++)
            for (int k = 0; k <= l; k ++)
                for (int s = 0; s <= 1; s ++)
                    for (int e = 0; e <= 1; e ++)
                    {
                        int _k = k + (j + j - s - e) * (A[i + 1] - A[i]);
                        if (_k > l)
                            continue;
                        Add(j - 1, _k, s, e, dpt[j][k][s][e] * 1LL * (j - 1) % Mod);
                        Add(j + 1, _k, s, e, dpt[j][k][s][e] * 1LL * (j - 1) % Mod);
                        Add(j, _k, s, e, dpt[j][k][s][e] * 2LL * (j - 1) % Mod);
                        if (!s)
                        {
                            Add(j, _k, 1, e, dpt[j][k][s][e]);
                            Add(j + 1, _k, 1, e, dpt[j][k][s][e]);
                            Add(j, _k, 0, e, dpt[j][k][s][e]);
                            Add(j + 1, _k, 0, e, dpt[j][k][s][e]);
                        }
                        if (!e)
                        {
                            Add(j, _k, s, 1, dpt[j][k][s][e]);
                            Add(j + 1, _k, s, 1, dpt[j][k][s][e]);
                            Add(j, _k, s, 0, dpt[j][k][s][e]);
                            Add(j + 1, _k, s, 0, dpt[j][k][s][e]);
                        }
                    }
    }
    int tot = 0;
    for (int i = 0; i <= l; i ++)
        tot = (tot + dp[1][i][1][1]) % Mod;
    return !printf("%d\n", tot);
}

Compilation message

skyscraper.cpp: In function 'int main()':
skyscraper.cpp:14:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &n, &l);
     ~~~~~^~~~~~~~~~~~~~~~
skyscraper.cpp:16:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &A[i]);
         ~~~~~^~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 384 KB Output is correct
2 Correct 5 ms 3840 KB Output is correct
3 Correct 6 ms 3712 KB Output is correct
4 Correct 7 ms 3712 KB Output is correct
5 Correct 8 ms 3840 KB Output is correct
6 Correct 8 ms 3840 KB Output is correct
7 Correct 5 ms 3840 KB Output is correct
8 Correct 7 ms 3840 KB Output is correct
9 Correct 8 ms 3840 KB Output is correct
10 Correct 7 ms 3840 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 3840 KB Output is correct
2 Correct 9 ms 3840 KB Output is correct
3 Correct 8 ms 3840 KB Output is correct
4 Correct 9 ms 3712 KB Output is correct
5 Correct 9 ms 3712 KB Output is correct
6 Correct 9 ms 3840 KB Output is correct
7 Correct 8 ms 3840 KB Output is correct
8 Correct 8 ms 3840 KB Output is correct
9 Correct 8 ms 3712 KB Output is correct
10 Correct 8 ms 3840 KB Output is correct

Subtask #3
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 384 KB Output is correct
2 Correct 5 ms 3840 KB Output is correct
3 Correct 6 ms 3712 KB Output is correct
4 Correct 7 ms 3712 KB Output is correct
5 Correct 8 ms 3840 KB Output is correct
6 Correct 8 ms 3840 KB Output is correct
7 Correct 5 ms 3840 KB Output is correct
8 Correct 7 ms 3840 KB Output is correct
9 Correct 8 ms 3840 KB Output is correct
10 Correct 7 ms 3840 KB Output is correct
11 Correct 8 ms 3840 KB Output is correct
12 Correct 9 ms 3840 KB Output is correct
13 Correct 8 ms 3840 KB Output is correct
14 Correct 9 ms 3712 KB Output is correct
15 Correct 9 ms 3712 KB Output is correct
16 Correct 9 ms 3840 KB Output is correct
17 Correct 8 ms 3840 KB Output is correct
18 Correct 8 ms 3840 KB Output is correct
19 Correct 8 ms 3712 KB Output is correct
20 Correct 8 ms 3840 KB Output is correct
21 Correct 17 ms 3840 KB Output is correct
22 Correct 303 ms 3800 KB Output is correct
23 Correct 382 ms 3840 KB Output is correct
24 Correct 336 ms 3832 KB Output is correct
25 Correct 375 ms 3932 KB Output is correct
26 Correct 346 ms 3804 KB Output is correct
27 Correct 137 ms 3712 KB Output is correct
28 Correct 173 ms 3832 KB Output is correct
29 Correct 294 ms 3832 KB Output is correct
30 Correct 369 ms 3796 KB Output is correct