oj.uz

답안 #883307

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
883307 2023-12-05T06:28:12 Z phoenix0423 Skyscraper (JOI16_skyscraper) C++17
15 / 100
 4 ms 33296 KB 
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll, ll> pll;
#define fastio ios::sync_with_stdio(false), cin.tie(0)
// #pragma GCC optimize("Ofast")
#define FOR(i, a, b) for(int i = (a); i < (b); i++)
#define REP(i, n) FOR(i, 0, n)
#define REP1(i, n) FOR(i, 0, n + 1)
#define SZ(x) (int)(x).size()
#define pb push_back
#define pf push_front
#define eb emplace_back
#define f first
#define s second
#define lowbit(x) x&-x
#define ckmin(a, b) a = min(a, b)
#define ckmax(a, b) a = max(a, b)
#define int long long
const int INF = 1e18;
const int maxn = 1000 + 5;
const int N = 1e9 + 7;
ll dp[105][105][1005][3];

signed main(void){
	fastio;
	int n, L;
	cin>>n>>L;
	vector<int> a(n);
	for(int i = 0; i < n; i++) cin>>a[i];
	sort(a.begin(), a.end());
	a.pb(a[n - 1]);
	dp[0][0][0][0] = 1;
	for(int i = 0; i < n; i++){
		for(int j = 0; j <= i; j++){
			for(int k = 0; k <= L; k++){
				for(int l = 0; l <= 2; l++){
					dp[i][j][k][l] %= N;
					if(k + (2 * j - 2 - l) * (a[i + 1] - a[i]) > L) continue;
					if(j) dp[i + 1][j][k + (2 * j - l) * (a[i + 1] - a[i])][l] += dp[i][j][k][l] * (2 * j - l);
					dp[i + 1][j + 1][k + (2 * j + 2 - l) * (a[i + 1] - a[i])][l] += dp[i][j][k][l] * (j + 1 - l);
					if(j > 1) dp[i + 1][j - 1][k + (2 * j - 2 - l) * (a[i + 1] - a[i])][l] += dp[i][j][k][l] * (j - 1);
					if(l != 2){
						dp[i + 1][j][k + (2 * j - (l + 1)) * (a[i + 1] - a[i])][l + 1] += dp[i][j][k][l] * (2 - l);//..............
						dp[i + 1][j + 1][k + (2 * j + 2 - (l + 1)) * (a[i + 1] - a[i])][l + 1] += dp[i][j][k][l] * (2 - l);
					}
				}
			}
		}
	}
	ll ans = 0;
	for(int i = 0; i <= L; i++) (ans += dp[n - 1][2][i][2]) %= N;
	for(int i = 0; i <= L; i++) (ans += dp[n - 1][1][i][1]) %= N;
	// for(int i = 0; i <= L; i++) (ans += dp[n][1][i][2]) %= N;
	cout<<ans<<"\n";

}

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 2396 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 29020 KB Output is correct
2 Correct 4 ms 33116 KB Output is correct
3 Correct 4 ms 33296 KB Output is correct
4 Correct 4 ms 33280 KB Output is correct
5 Correct 4 ms 33284 KB Output is correct
6 Correct 4 ms 33116 KB Output is correct
7 Correct 4 ms 33228 KB Output is correct
8 Correct 4 ms 33116 KB Output is correct
9 Correct 4 ms 33116 KB Output is correct
10 Correct 4 ms 33116 KB Output is correct

Subtask #3
0 / 80.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 2396 KB Output isn't correct
2 Halted 0 ms 0 KB -