oj.uz

Submission #601714

# Submission time Handle Problem Language Result Execution time Memory
601714 2022-07-22T09:21:50 Z 1bin Skyscraper (JOI16_skyscraper) C++14
100 / 100
 198 ms 121004 KB 
#include <bits/stdc++.h>

using namespace std;

#define all(v) v.begin(), v.end()
typedef long long ll;
const ll mod = 1e9 + 7;
ll n, mx, dp[105][105][1005][5], h[101];

int main(void){
    ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    
    cin >> n >> mx;
    for(int i = 1; i <= n; i++) cin >> h[i];
    if(n == 1){
        cout << "1"; return 0;
    }
    sort(h + 1, h + n + 1);
    dp[0][0][0][0] = 1; h[n + 1] = 10000;
    for(int i = 1; i <= n; i++)
        for(int j = 1; j <= i; j++)
            for(int kk = 0; kk <= mx; kk++)
                for(int l = 0; l < 3; l++){
                    int d = (2 * j - l) * (h[i + 1] - h[i]);
                    int k = kk + d;
                    if(k > mx) continue;
                    if(j > l) dp[i][j][k][l] += (j - l) * dp[i - 1][j - 1][kk][l];
                    dp[i][j][k][l] += (2 * j - l) * dp[i - 1][j][kk][l];
                    dp[i][j][k][l] += j * dp[i - 1][j + 1][kk][l];
                    if(l) {
                        dp[i][j][k][l] += (3 - l) * dp[i - 1][j - 1][kk][l - 1];
                        if(i == 2 && j == 1 && k == 5 && l == 1){
                            //cout << i << ' ' << j << ' ' << kk << ' ' << l - 1 << ' ' << dp[i][j][kk][l - 1] << '\n';      
                        }
                        dp[i][j][k][l] += (3 - l) * dp[i - 1][j][kk][l - 1];
                    }
                    dp[i][j][k][l] %= mod;
                    //cout << i << ' ' << j << ' ' << k << ' ' << l << ' ' << dp[i][j][k][l] << '\n';
                }
    ll ans = 0;
    for(int i = 0; i <= mx; i++) ans += dp[n][1][i][2], ans %= mod;
    cout << ans;
    return 0;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 256 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 2 ms 352 KB Output is correct
5 Correct 2 ms 988 KB Output is correct
6 Correct 1 ms 864 KB Output is correct
7 Correct 1 ms 480 KB Output is correct
8 Correct 1 ms 480 KB Output is correct
9 Correct 2 ms 1116 KB Output is correct
10 Correct 1 ms 596 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 768 KB Output is correct
2 Correct 2 ms 900 KB Output is correct
3 Correct 1 ms 852 KB Output is correct
4 Correct 2 ms 748 KB Output is correct
5 Correct 2 ms 856 KB Output is correct
6 Correct 2 ms 992 KB Output is correct
7 Correct 1 ms 768 KB Output is correct
8 Correct 1 ms 864 KB Output is correct
9 Correct 2 ms 980 KB Output is correct
10 Correct 1 ms 768 KB Output is correct

Subtask #3
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 256 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 2 ms 352 KB Output is correct
5 Correct 2 ms 988 KB Output is correct
6 Correct 1 ms 864 KB Output is correct
7 Correct 1 ms 480 KB Output is correct
8 Correct 1 ms 480 KB Output is correct
9 Correct 2 ms 1116 KB Output is correct
10 Correct 1 ms 596 KB Output is correct
11 Correct 2 ms 768 KB Output is correct
12 Correct 2 ms 900 KB Output is correct
13 Correct 1 ms 852 KB Output is correct
14 Correct 2 ms 748 KB Output is correct
15 Correct 2 ms 856 KB Output is correct
16 Correct 2 ms 992 KB Output is correct
17 Correct 1 ms 768 KB Output is correct
18 Correct 1 ms 864 KB Output is correct
19 Correct 2 ms 980 KB Output is correct
20 Correct 1 ms 768 KB Output is correct
21 Correct 3 ms 3296 KB Output is correct
22 Correct 141 ms 100828 KB Output is correct
23 Correct 159 ms 119240 KB Output is correct
24 Correct 129 ms 112732 KB Output is correct
25 Correct 155 ms 120756 KB Output is correct
26 Correct 138 ms 108580 KB Output is correct
27 Correct 70 ms 55344 KB Output is correct
28 Correct 98 ms 66144 KB Output is correct
29 Correct 155 ms 107820 KB Output is correct
30 Correct 198 ms 121004 KB Output is correct