제출 #101163

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
101163		autumn_eel	Skyscraper (JOI16_skyscraper)	C++14	15 / 100	296 ms	90972 KiB

skyscraper

#include <bits/stdc++.h>
#define rep(i,n)for(int i=0;i<(n);i++)
#define MOD 1000000007
#define INF 0x3f3f3f3f
using namespace std;
typedef long long ll;
typedef pair<int,int>P;

int dp[1<<14][14][101];
int a[14];

int main(){
	int n,L;cin>>n>>L;
	if(n>14)abort();
	rep(i,n)scanf("%d",&a[i]);
	rep(i,n)dp[1<<i][i][0]=1;
	rep(i,1<<n)rep(j,n){
		if(!(i>>j&1))continue;
		rep(k,L+1){
			if(dp[i][j][k]==0)continue;
			rep(t,n){
				if(i>>t&1)continue;
				if(abs(a[t]-a[j])+k<=L){
					(dp[i|1<<t][t][abs(a[t]-a[j])+k]+=dp[i][j][k])%=MOD;
				}
			}
		}
	}
	int ans=0;
	rep(i,n)rep(j,L+1)(ans+=dp[(1<<n)-1][i][j])%=MOD;
	cout<<ans<<endl;
}

컴파일 시 표준 에러 (stderr) 메시지

skyscraper.cpp: In function 'int main()':
skyscraper.cpp:15:15: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  rep(i,n)scanf("%d",&a[i]);
          ~~~~~^~~~~~~~~~~~

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