Submission #1217045

#	Time	Username	Problem	Language	Result	Execution time	Memory
1217045		Malix	Skyscraper (JOI16_skyscraper)	C++20	20 / 100	193 ms	186032 KiB

skyscraper

#include <bits/stdc++.h>
using namespace std;
 
typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vii;
typedef pair<int,int> pi;
typedef vector<pi> pii;
typedef tuple<int,int,int> ti;
typedef vector<ll> li;
typedef vector<li> lii;
 
#define REP(i,a,b) for(int i=a;i<b;i++)
#define F first
#define S second
#define PB push_back
#define LSOne(s) ((s)&(-s))
#define all(x) x.begin(),x.end()

ll INF=1000000000000000010;
int inf=1e9+10;
ll M=1e9+7;

int n,m,k,a[14];

int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    cin>>n>>m;
    m++;
    k=(1<<n);
    vector<vector<vector<ll>>> dp(k,vector<vector<ll>>(n,vector<ll>(m,0)));
    REP(i,0,n)cin>>a[i];
    ll ans=0;
    REP(i,0,n)dp[(1<<i)][i][0]=1;
    REP(i,1,k)REP(j,0,n){
        if((i&(1<<j))==0)continue;
        REP(x,0,m){
            if(dp[i][j][x]==0)continue;
            REP(y,0,n)if(((i&(1<<y))==0)&&(x+abs(a[y]-a[j])<m)){
                dp[(i|(1<<y))][y][x+abs(a[y]-a[j])]+=dp[i][j][x];
            }
        }
    }
    REP(i,0,n)REP(j,0,m)ans+=dp[k-1][i][j];
    cout<<ans%M;
}

• Subtask 1: 5 / 5
• Subtask 2: 15 / 15
• Subtask 3: 0 / 80