oj.uz

답안 #448681

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
448681 2021-07-31T16:24:01 Z ymm Skyscraper (JOI16_skyscraper) C++17
15 / 100
 83 ms 10444 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 >= 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
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 5196 KB Output is correct
2 Correct 11 ms 5324 KB Output is correct
3 Correct 17 ms 5196 KB Output is correct
4 Correct 18 ms 5268 KB Output is correct
5 Runtime error 9 ms 10444 KB Execution killed with signal 11
6 Halted 0 ms 0 KB -

Subtask #2
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 73 ms 5248 KB Output is correct
2 Correct 53 ms 5248 KB Output is correct
3 Correct 81 ms 5248 KB Output is correct
4 Correct 57 ms 5196 KB Output is correct
5 Correct 61 ms 5176 KB Output is correct
6 Correct 67 ms 5260 KB Output is correct
7 Correct 77 ms 5196 KB Output is correct
8 Correct 83 ms 5252 KB Output is correct
9 Correct 82 ms 5256 KB Output is correct
10 Correct 60 ms 5196 KB Output is correct

Subtask #3
0 / 80.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 5196 KB Output is correct
2 Correct 11 ms 5324 KB Output is correct
3 Correct 17 ms 5196 KB Output is correct
4 Correct 18 ms 5268 KB Output is correct
5 Runtime error 9 ms 10444 KB Execution killed with signal 11
6 Halted 0 ms 0 KB -