QOJ.ac

QOJ

ID题目提交者结果用时内存语言文件大小提交时间测评时间
#472378#1436. Split in SetszbrcWA 3ms6944kbC++141.8kb2024-07-11 16:00:502024-07-11 16:00:50

Judging History

你现在查看的是最新测评结果

  • [2024-07-11 16:00:50]
  • 评测
  • 测评结果:WA
  • 用时:3ms
  • 内存:6944kb
  • [2024-07-11 16:00:50]
  • 提交

answer

#include<bits/stdc++.h>
#define int long long
using namespace std;
const int N=2e5+10,mod=1e9+7;
int n,k,ans;
multiset<int>a;
int inv[N],fac[N];
int Pow(int x,int n){
	if(n==0)return 1;
	int a=Pow(x,n/2);
	return a*a%mod*(n&1?x:1)%mod;
}
void init(){
	inv[0]=fac[0]=1;
	for(int i=1;i<N;i++)fac[i]=fac[i-1]*i%mod;
	inv[N-1]=Pow(fac[N-1],mod-2);
	for(int i=N-2;i;i--)inv[i]=inv[i+1]*(i+1)%mod;
}
int P(int n,int m){
	return fac[n]*inv[n-m]%mod;
}
int C(int n,int m){
	if(m<0)return 0;
	int res=0;
	for(int i=0;i<=m;i++){
		if((m-i)&1)res=(res+mod-Pow(i,n)*inv[i]%mod*inv[m-i]%mod)%mod;
		else res=(res+Pow(i,n)*inv[i]%mod*inv[m-i]%mod)%mod;
	}
	return res;
}
int tot=1;
signed main(){
	ios::sync_with_stdio(0),cin.tie(0),cout.tie(0);
	cin>>n>>k;
	init();
	tot=tot*P(k,k);
	for(int i=1;i<=n;i++){
		int x;cin>>x;
		a.insert(x);
	}
	if(k==1){
		ans=*a.begin();
		for(auto i : a)ans&=i;
		cout<<ans<<' '<<1;
		return 0;
	}
	vector<int>e;
	for(int i=30;i>=0&&k;i--){
		int cnt=0;
		e.clear();
		for(auto j : a){
			if((j>>i)&1){
				cnt++;
				e.push_back(j);
			}
		}
//		cout<<cnt<<' '<<tot<<' '<<k<<'\n';
		if(i==0){
			if(cnt<k)tot=tot*C(a.size()-cnt,k-cnt)%mod;
			else tot=C(cnt+1,k)*tot%mod;
		}
		if(!cnt)continue;
		if(cnt==a.size())ans+=k*(1LL<<i);
		else ans+=(k-1)*(1LL<<i);
		if(cnt<k){
			k-=cnt;
			for(int j=0;j<e.size();j++){
				ans+=e[j]&((1LL<<i)-1);
				a.erase(a.lower_bound(e[j]));
			}
		}else{
			int s=0,flag=1;
			for(auto j = a.rbegin();j != a.rend();j++){
				if(lower_bound(e.begin(),e.end(),*j)==e.end()){
					if(flag)s=*j,flag=0;
					else s&=*j;
					a.erase(a.lower_bound(*j));
				}
			}
			if(cnt!=a.size())a.insert(s);
			for(int j=0;j<e.size();j++){
				a.erase(a.lower_bound(e[j]));
				a.insert(e[j]-(1LL<<i));
			}
		}
	}
	cout<<ans<<' '<<tot<<'\n';
	return 0;
}

详细

Test #1:

score: 100
Accepted
time: 3ms
memory: 6944kb

input:

3 2
4 7 5

output:

11 2

result:

ok 2 tokens

Test #2:

score: 0
Accepted
time: 3ms
memory: 6732kb

input:

4 1
44 47 74 77

output:

8 1

result:

ok 2 tokens

Test #3:

score: -100
Wrong Answer
time: 3ms
memory: 6652kb

input:

4 4
44 47 74 77

output:

306 24

result:

wrong answer 1st words differ - expected: '242', found: '306'