oj.uz

Submission #1042326

# Submission time Handle Problem Language Result Execution time Memory
1042326 2024-08-02T21:14:17 Z 1L1YA Skyscraper (JOI16_skyscraper) C++17
100 / 100
 63 ms 5636 KB 
//1L1YA

#include<bits/stdc++.h>
using namespace std;

//#pragma GCC optimize ("O3,unrool-loops")
//#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")

typedef long long       ll;
typedef pair<ll,ll>     pll;
typedef pair<int,int>   pii;

#define Pb              push_back
#define F               first
#define S               second
#define endl            '\n'
#define sep             ' '
#define all(x)          x.begin(),x.end()
#define al(x,n)         x+1,x+n+1
#define SZ(x)           ((int)x.size())
#define lc              (id<<1)
#define rc              (lc|1)
#define mid             (l+r>>1)
#define dokme(x)        cout << x << endl, exit(0)
#define sik(x)          cout << x << endl;continue;
#define FastIO          ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define FileIO          freopen("input.txt","r",stdin);freopen("output.txt","w",stdout);

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

const ll oo=1e18;
const int mod=1e9+7;
const int inf=1e9+111;
const int N=111;
const int M=1011;
const int lg=23;

ll n,m,a[N],dp[M][N][3],DP[M][N][3];

int main(){
	FastIO

	cin >> n >> m;
	for(int i=1;i<=n;i++)	cin >> a[i];
	if(n==1)	dokme(1);
	sort(al(a,n));
	DP[0][0][0]=1;
	a[n+1]=1e5;
	for(int i=1;i<=n;i++){
		for(int j=0;j<=m;j++)
			for(int k=1;k<=i;k++)
				for(int c=0;c<3;c++){
					int p=2*k-c,w=j-p*(a[i+1]-a[i]);
					dp[j][k][c]=0;
					if(w<0)	continue;
					dp[j][k][c]=(DP[w][k-1][c]*(k-c)+DP[w][k][c]*p+DP[w][k+1][c]*k)%mod;
					if(c)	dp[j][k][c]=(dp[j][k][c]+DP[w][k-1][c-1]*(3-c)+DP[w][k][c-1]*(3-c))%mod;
				}
		for(int j=0;j<=m;j++)
			for(int k=0;k<=i;k++)
				for(int c=0;c<3;c++)
					DP[j][k][c]=dp[j][k][c];
	}
	ll ans=0;
	for(int i=0;i<=m;i++)	ans=(ans+dp[i][1][2])%mod;
	cout << ans << endl;

	return 0;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 1 ms 2652 KB Output is correct
5 Correct 3 ms 5212 KB Output is correct
6 Correct 2 ms 4700 KB Output is correct
7 Correct 0 ms 1116 KB Output is correct
8 Correct 0 ms 860 KB Output is correct
9 Correct 3 ms 4952 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 2648 KB Output is correct
2 Correct 0 ms 860 KB Output is correct
3 Correct 0 ms 604 KB Output is correct
4 Correct 1 ms 2652 KB Output is correct
5 Correct 1 ms 1112 KB Output is correct
6 Correct 0 ms 860 KB Output is correct
7 Correct 0 ms 604 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2652 KB Output is correct
10 Correct 0 ms 860 KB Output is correct

Subtask #3
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 1 ms 2652 KB Output is correct
5 Correct 3 ms 5212 KB Output is correct
6 Correct 2 ms 4700 KB Output is correct
7 Correct 0 ms 1116 KB Output is correct
8 Correct 0 ms 860 KB Output is correct
9 Correct 3 ms 4952 KB Output is correct
10 Correct 1 ms 2652 KB Output is correct
11 Correct 1 ms 2648 KB Output is correct
12 Correct 0 ms 860 KB Output is correct
13 Correct 0 ms 604 KB Output is correct
14 Correct 1 ms 2652 KB Output is correct
15 Correct 1 ms 1112 KB Output is correct
16 Correct 0 ms 860 KB Output is correct
17 Correct 0 ms 604 KB Output is correct
18 Correct 1 ms 2396 KB Output is correct
19 Correct 1 ms 2652 KB Output is correct
20 Correct 0 ms 860 KB Output is correct
21 Correct 1 ms 684 KB Output is correct
22 Correct 44 ms 4956 KB Output is correct
23 Correct 63 ms 5468 KB Output is correct
24 Correct 52 ms 4696 KB Output is correct
25 Correct 62 ms 5636 KB Output is correct
26 Correct 58 ms 4700 KB Output is correct
27 Correct 17 ms 1628 KB Output is correct
28 Correct 22 ms 1884 KB Output is correct
29 Correct 46 ms 3444 KB Output is correct
30 Correct 63 ms 5476 KB Output is correct