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답안 #681628

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
681628 2023-01-13T13:42:08 Z vjudge1 Skyscraper (JOI16_skyscraper) C++17
20 / 100
 2000 ms 156300 KB 
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pii pair<ll,ll>
#define pll pair<ll,ll>
#define vi vector<int>
#define vll vector<long long>
#define vpii vector<pii >
#define Graph vector<vector<int> >
#define WGraph vector<vector<pii>>
#define read freopen("input.txt","r",stdin)
#define write freopen("output.txt","w",stdout)
#define mp(a,b) make_pair(a,b)
#define fastio ios_base::sync_with_stdio(false);cin.tie(NULL);
#define bound(i,j,n,m) ((i)<n&&(j)<m&&(i)>=0&&(j)>=0)
#define all(container) container.begin(),container.end()
#define fi first
#define se second
#define pub push_back
#define sqr(x) ((x)*(x))
#define LL_MAX 0x7fffffffffffffff
#define getPos(i,j,m) ((i)*m+(j))
const ll mod=1000000007;
const int offset=200001;
int dp[2][102][offset+2005*2][3];
int a[101];
void solvecases(int cse)
{
    int n,l;
    cin>>n>>l;
    for(int i=0;i<n;++i)
        cin>>a[i];
    sort(a,a+n);
    for(int i=1;i<n;++i)
        a[i]=a[i]-a[0];
    a[0]=0;
//    for(int i=0;i<n;++i)
//        cout<<a[i]<<' ';
//    cout<<'\n';
    dp[0][1][0+offset][0]=1;
    dp[0][1][0+offset][1]=2;
    dp[0][1][0+offset][2]=1;

    int cur=1;
    int sum=0;
    for(int i=1;i<n;++i)
    {
        for(int j=1;j<=i+1;++j){
            for(int cost=-2*sum-2*a[i];cost<=2005;++cost){
                for(int k=0;k<3;++k){
                    dp[cur][j][cost+offset][k]=0;
                }
            }
        }
        int prv=cur^1;
        for(int j=1;j<=i;++j)
        {
            for(int cost=-2*sum;cost<=2005;++cost)
            {
                if(dp[prv][j][cost+offset][0])
                {
                    dp[cur][j+1][cost+offset-2*a[i]][0]
                    =(dp[cur][j+1][cost+offset-2*a[i]][0]+
                      (ll)dp[prv][j][cost+offset][0]*(j+1))%mod;
                    dp[cur][j+1][cost+offset-a[i]][1]
                    =(dp[cur][j+1][cost+offset-a[i]][1]+
                      (ll)dp[prv][j][cost+offset][0]*(2))%mod;
                    if(j>1&&cost+2*a[i]<=2005)
                    {
                        dp[cur][j-1][cost+offset+2*a[i]][0]
                        =(dp[cur][j-1][cost+offset+2*a[i]][0]+
                        (ll)dp[prv][j][cost+offset][0]*(j-1))%mod;

                    }
                    dp[cur][j][cost+offset][0]=
                    (dp[cur][j][cost+offset][0]+
                     (ll)dp[prv][j][cost+offset][0]*(2*j))%mod;
                    if(cost+a[i]<=2005){

                        dp[cur][j][cost+offset+a[i]][1]=
                        (dp[cur][j][cost+offset+a[i]][1]+
                         (ll)dp[prv][j][cost+offset][0]*2)%mod;
                    }

                }
                if(dp[prv][j][cost+offset][1])
                {
                    dp[cur][j+1][cost+offset-2*a[i]][1]
                    =(dp[cur][j+1][cost+offset-2*a[i]][1]+
                      (ll)dp[prv][j][cost+offset][1]*(j))%mod;
                    dp[cur][j+1][cost+offset-a[i]][2]
                    =(dp[cur][j+1][cost+offset-a[i]][2]+
                      (ll)dp[prv][j][cost+offset][1])%mod;
                    if(j>1&&cost+2*a[i]<=2005)
                    {
                        dp[cur][j-1][cost+offset+2*a[i]][1]
                        =(dp[cur][j-1][cost+offset+2*a[i]][1]+
                        (ll)dp[prv][j][cost+offset][1]*(j-1))%mod;

                    }
                    dp[cur][j][cost+offset][1]=
                    (dp[cur][j][cost+offset][1]+
                     (ll)dp[prv][j][cost+offset][1]*(2*j-1))%mod;
                    if(cost+a[i]<=2005){
                        dp[cur][j][cost+offset+a[i]][2]=
                        (dp[cur][j][cost+offset+a[i]][2]+
                         (ll)dp[prv][j][cost+offset][1])%mod;
                    }
                }
                if(dp[prv][j][cost+offset][2])
                {
                    if(j>1){
                        dp[cur][j+1][cost+offset-2*a[i]][2]
                        =(dp[cur][j+1][cost+offset-2*a[i]][2]+
                          (ll)dp[prv][j][cost+offset][2]*(j-1))%mod;
                        if(cost+2*a[i]<=2005){
                            dp[cur][j-1][cost+offset+2*a[i]][2]=
                            (dp[cur][j-1][cost+offset+2*a[i]][2]+
                                (ll)dp[prv][j][cost+offset][2]*(j-1)
                             )%mod;
                        }
                        dp[cur][j][cost+offset][2]=
                        (dp[cur][j][cost+offset][2]+
                         (ll)dp[prv][j][cost+offset][2]*2*(j-1))%mod;
                    }
                }
            }
        }
        cur^=1;
        sum+=a[i];
    }
    cur^=1;
    ll ans=0;
    for(int i=0;i<=l;++i)
        ans+=dp[cur][1][i+offset][2];
//    for(int i=-offset;i<0;++i)
//        assert(!dp[cur][1][i+offset][2]);
    ans%=mod;
    cout<<ans<<'\n';
}
int main()
{

    fastio;
    //build(100000);
    //brute();
    int t=1;
    //cout<<fixed<<setprecision(2);
    //cin>>t;
    for(int i=1;i<=t;i++)
    {
        solvecases(i);
        //brute(i);
    }
}
/*
4 10
3 6 2 9
8 35
3 7 1 5 10 2 11 6
*/

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 456 KB Output is correct
4 Correct 1 ms 596 KB Output is correct
5 Correct 2 ms 2128 KB Output is correct
6 Correct 2 ms 1492 KB Output is correct
7 Correct 2 ms 980 KB Output is correct
8 Correct 1 ms 724 KB Output is correct
9 Correct 2 ms 1492 KB Output is correct
10 Correct 1 ms 840 KB Output is correct

Subtask #2
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 980 KB Output is correct
2 Correct 2 ms 1364 KB Output is correct
3 Correct 2 ms 1236 KB Output is correct
4 Correct 2 ms 1492 KB Output is correct
5 Correct 2 ms 1492 KB Output is correct
6 Correct 2 ms 1364 KB Output is correct
7 Correct 2 ms 1224 KB Output is correct
8 Correct 2 ms 1236 KB Output is correct
9 Correct 1 ms 1236 KB Output is correct
10 Correct 2 ms 1364 KB Output is correct

Subtask #3
0 / 80.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 456 KB Output is correct
4 Correct 1 ms 596 KB Output is correct
5 Correct 2 ms 2128 KB Output is correct
6 Correct 2 ms 1492 KB Output is correct
7 Correct 2 ms 980 KB Output is correct
8 Correct 1 ms 724 KB Output is correct
9 Correct 2 ms 1492 KB Output is correct
10 Correct 1 ms 840 KB Output is correct
11 Correct 2 ms 980 KB Output is correct
12 Correct 2 ms 1364 KB Output is correct
13 Correct 2 ms 1236 KB Output is correct
14 Correct 2 ms 1492 KB Output is correct
15 Correct 2 ms 1492 KB Output is correct
16 Correct 2 ms 1364 KB Output is correct
17 Correct 2 ms 1224 KB Output is correct
18 Correct 2 ms 1236 KB Output is correct
19 Correct 1 ms 1236 KB Output is correct
20 Correct 2 ms 1364 KB Output is correct
21 Correct 17 ms 4200 KB Output is correct
22 Correct 199 ms 18144 KB Output is correct
23 Execution timed out 2072 ms 156300 KB Time limit exceeded
24 Halted 0 ms 0 KB -