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Submission #860952

# Submission time Handle Problem Language Result Execution time Memory
860952 2023-10-14T22:08:23 Z blackslex Skyscraper (JOI16_skyscraper) C++17
100 / 100
 104 ms 98384 KB 
#include<bits/stdc++.h>

using namespace std;
using ll = long long;

const int N = 105, L = 1005, M = 1e9 + 7;
ll n, d, a[N], dp[N][N][L][3];

int main() {
    scanf("%lld %lld", &n, &d);
    for (int i = 1; i <= n; i++) scanf("%lld", &a[i]); sort(a + 1, a + n + 1);
    dp[1][1][0][0] = 1; dp[1][1][0][1] = 2;
    for (int i = 1; i < n; i++) {
        for (int j = 1; j <= i; j++) {
            for (int l = 0; l <= d; l++) {
                for (int k = 0; k < 3; k++) {
                    int cur = l + (a[i + 1] - a[i]) * (j * 2LL - k);
                    if (cur > d) continue;
                    dp[i + 1][j - 1][cur][k] += (j - 1LL) * dp[i][j][l][k]; dp[i + 1][j - 1][cur][k] %= M; // add, merge
                    dp[i + 1][j][cur][k] += (j * 2LL - k) * dp[i][j][l][k]; dp[i + 1][j][cur][k] %= M; // add, merge one ending point
                    dp[i + 1][j + 1][cur][k] += (j + 1LL - k) * dp[i][j][l][k]; dp[i + 1][j + 1][cur][k] %= M; // add, no merge
                    if (k == 2) continue;
                    dp[i + 1][j][cur][k + 1] += (2LL - k) * dp[i][j][l][k]; dp[i + 1][j][cur][k + 1] %= M; // add, fix, merge
                    dp[i + 1][j + 1][cur][k + 1] = (2LL - k) * dp[i][j][l][k]; dp[i + 1][j + 1][cur][k + 1] %= M; // add, fix, no merge
                }
            }
        }
    }
    for (int i = 1; i <= d; i++) dp[n][1][i][2] += dp[n][1][i - 1][2], dp[n][1][i][2] %= M;
    printf("%lld", (dp[n][1][d][2] + (n == 1)) % M);
}

Compilation message

skyscraper.cpp: In function 'int main()':
skyscraper.cpp:11:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   11 |     for (int i = 1; i <= n; i++) scanf("%lld", &a[i]); sort(a + 1, a + n + 1);
      |     ^~~
skyscraper.cpp:11:56: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   11 |     for (int i = 1; i <= n; i++) scanf("%lld", &a[i]); sort(a + 1, a + n + 1);
      |                                                        ^~~~
skyscraper.cpp:10:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |     scanf("%lld %lld", &n, &d);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~
skyscraper.cpp:11:39: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 |     for (int i = 1; i <= n; i++) scanf("%lld", &a[i]); sort(a + 1, a + n + 1);
      |                                  ~~~~~^~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 2396 KB Output is correct
2 Correct 0 ms 2396 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 3164 KB Output is correct
6 Correct 1 ms 5212 KB Output is correct
7 Correct 1 ms 2652 KB Output is correct
8 Correct 1 ms 2652 KB Output is correct
9 Correct 1 ms 5212 KB Output is correct
10 Correct 1 ms 2652 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2904 KB Output is correct
2 Correct 1 ms 2908 KB Output is correct
3 Correct 1 ms 2908 KB Output is correct
4 Correct 1 ms 2908 KB Output is correct
5 Correct 1 ms 2908 KB Output is correct
6 Correct 1 ms 3164 KB Output is correct
7 Correct 1 ms 2908 KB Output is correct
8 Correct 1 ms 2908 KB Output is correct
9 Correct 1 ms 3164 KB Output is correct
10 Correct 1 ms 2908 KB Output is correct

Subtask #3
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 2396 KB Output is correct
2 Correct 0 ms 2396 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 3164 KB Output is correct
6 Correct 1 ms 5212 KB Output is correct
7 Correct 1 ms 2652 KB Output is correct
8 Correct 1 ms 2652 KB Output is correct
9 Correct 1 ms 5212 KB Output is correct
10 Correct 1 ms 2652 KB Output is correct
11 Correct 1 ms 2904 KB Output is correct
12 Correct 1 ms 2908 KB Output is correct
13 Correct 1 ms 2908 KB Output is correct
14 Correct 1 ms 2908 KB Output is correct
15 Correct 1 ms 2908 KB Output is correct
16 Correct 1 ms 3164 KB Output is correct
17 Correct 1 ms 2908 KB Output is correct
18 Correct 1 ms 2908 KB Output is correct
19 Correct 1 ms 3164 KB Output is correct
20 Correct 1 ms 2908 KB Output is correct
21 Correct 2 ms 5724 KB Output is correct
22 Correct 81 ms 82396 KB Output is correct
23 Correct 102 ms 91888 KB Output is correct
24 Correct 94 ms 93428 KB Output is correct
25 Correct 102 ms 98384 KB Output is correct
26 Correct 91 ms 89728 KB Output is correct
27 Correct 40 ms 50000 KB Output is correct
28 Correct 50 ms 57940 KB Output is correct
29 Correct 85 ms 91472 KB Output is correct
30 Correct 104 ms 94948 KB Output is correct