oj.uz

Submission #448683

# Submission time Handle Problem Language Result Execution time Memory
448683 2021-07-31T16:30:33 Z ymm Skyscraper (JOI16_skyscraper) C++17
100 / 100
 578 ms 5280 KB 
///
///    I have a dream and a piano
///

#define _USE_MATH_DEFINES
#define FAST ios::sync_with_stdio(false),cin.tie(0);
#include <bits/stdc++.h>
#define Loop(x, l, r) for(int x = (l); x < (r); ++x)
#define LoopR(x, l, r) for(int x = (r)-1; x >= (l); --x)
#define all(x) x.begin(), x.end()
#define Kill(x) exit((cout << (x) << '\n', 0))
#define YN(flag) ((flag)? "YES": "NO")
#define F first
#define S second
typedef          long long   ll;
typedef unsigned long long  ull;
typedef std::pair<int,int>  pii;
typedef std::pair<ll ,ll >  pll;
using namespace std;

const int N = 105;
const int L = 1005;
const int mod = 1e9 + 7;
ll dp1[N][L][3];
ll dp2[N][L][3];
int a[N];
int n, l;

int main()
{
    FAST;
    cin >> n >> l;
    Loop(i,0,n) cin >> a[i];
    sort(a, a+n);
    dp1[0][0][0] = 1;
    Loop(i,0,n)
    {
        Loop(k,0,N)
            Loop(l,0,L)
                Loop(r,0,3)
                {
                    ll x = i? a[i] - a[i-1]: a[0];
                    x = (2*k - r)*x + l;
                    if(x < 0 || x >= L) continue;

                    if(k > 0) dp2[k-1][x][r] += (k-1) * dp1[k][l][r];
                    if(true) dp2[k][x][r] += (2*k-r) * dp1[k][l][r];
                    if(r+!k < 2) dp2[k+!k][x][r+1+!k] += (2-r-!k) * dp1[k][l][r];
                    if(r < 2  && k < N-1) dp2[k+1][x][r+1] += (2-r) * dp1[k][l][r];
                    if(k < N-1) dp2[k+1][x][r] += (k+1-r) * dp1[k][l][r];
                }

        Loop(k,0,N)
            Loop(l,0,L)
                Loop(r,0,3)
                    dp1[k][l][r] = dp2[k][l][r] % mod,
                    dp2[k][l][r] = 0;
    }
    ll ans = 0;
    Loop(i,0,l+1)
        ans += dp1[1][i][2];
    cout << ans%mod << '\n';
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 5196 KB Output is correct
2 Correct 10 ms 5196 KB Output is correct
3 Correct 18 ms 5272 KB Output is correct
4 Correct 20 ms 5264 KB Output is correct
5 Correct 16 ms 5264 KB Output is correct
6 Correct 16 ms 5272 KB Output is correct
7 Correct 20 ms 5280 KB Output is correct
8 Correct 42 ms 5196 KB Output is correct
9 Correct 19 ms 5276 KB Output is correct
10 Correct 33 ms 5192 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 74 ms 5248 KB Output is correct
2 Correct 54 ms 5252 KB Output is correct
3 Correct 85 ms 5248 KB Output is correct
4 Correct 57 ms 5248 KB Output is correct
5 Correct 61 ms 5248 KB Output is correct
6 Correct 66 ms 5196 KB Output is correct
7 Correct 79 ms 5248 KB Output is correct
8 Correct 82 ms 5248 KB Output is correct
9 Correct 82 ms 5260 KB Output is correct
10 Correct 57 ms 5196 KB Output is correct

Subtask #3
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 5196 KB Output is correct
2 Correct 10 ms 5196 KB Output is correct
3 Correct 18 ms 5272 KB Output is correct
4 Correct 20 ms 5264 KB Output is correct
5 Correct 16 ms 5264 KB Output is correct
6 Correct 16 ms 5272 KB Output is correct
7 Correct 20 ms 5280 KB Output is correct
8 Correct 42 ms 5196 KB Output is correct
9 Correct 19 ms 5276 KB Output is correct
10 Correct 33 ms 5192 KB Output is correct
11 Correct 74 ms 5248 KB Output is correct
12 Correct 54 ms 5252 KB Output is correct
13 Correct 85 ms 5248 KB Output is correct
14 Correct 57 ms 5248 KB Output is correct
15 Correct 61 ms 5248 KB Output is correct
16 Correct 66 ms 5196 KB Output is correct
17 Correct 79 ms 5248 KB Output is correct
18 Correct 82 ms 5248 KB Output is correct
19 Correct 82 ms 5260 KB Output is correct
20 Correct 57 ms 5196 KB Output is correct
21 Correct 234 ms 5248 KB Output is correct
22 Correct 454 ms 5252 KB Output is correct
23 Correct 341 ms 5196 KB Output is correct
24 Correct 443 ms 5252 KB Output is correct
25 Correct 351 ms 5196 KB Output is correct
26 Correct 370 ms 5248 KB Output is correct
27 Correct 578 ms 5268 KB Output is correct
28 Correct 574 ms 5196 KB Output is correct
29 Correct 538 ms 5252 KB Output is correct
30 Correct 333 ms 5252 KB Output is correct