Submission #202267

#	Time	Username	Problem	Language	Result	Execution time	Memory
202267		Segtree	Skyscraper (JOI16_skyscraper)	C++14	15 / 100	1384 ms	198008 KiB

skyscraper

#include<iostream>
#include<algorithm>
#include<vector>
#include<queue>
#include<set>
#include<unordered_set>
#include<unordered_map>
using namespace std;
typedef long long ll;
#define chmax(a,b) a=max(a,b)
#define chmin(a,b) a=min(a,b)
#define all(x) x.begin(),x.end()
#define rep(i,n) for(int i=0;i<n;i++)
#define mod 1000000007
#define mad(a,b) a=(a+b)%mod
ll n,L,a[14];
ll dp[(1<<14)][14][110];
int main(){
    cin>>n>>L;
    if(n>14)return 0;
    rep(i,n)cin>>a[i];
    rep(s,(1<<n))rep(x,n)rep(l,110)dp[s][x][l]=0;
    rep(i,n)dp[(1<<i)][i][0]=1;
    rep(s,(1<<n))rep(x,n)rep(l,110){
	rep(y,n)if(!(s&(1<<y))){
	    if(l+abs(a[x]-a[y])<110){
		mad(dp[s+(1<<y)][y][l+abs(a[x]-a[y])],dp[s][x][l]);
	    }
	}
    }
    ll ans=0;
    rep(x,n)rep(l,L+1)mad(ans,dp[(1<<n)-1][x][l]);
    cout<<ans<<endl;
}

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