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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
#841947#9967. Imbalanced Teamsucup-team1004#WA 0ms4100kbC++201.9kb2025-01-04 09:00:492025-01-04 09:00:53

Judging History

你现在查看的是最新测评结果

  • [2025-01-04 09:00:53]
  • 评测
  • 测评结果:WA
  • 用时:0ms
  • 内存:4100kb
  • [2025-01-04 09:00:49]
  • 提交

answer

#include<bits/stdc++.h>
#define Gc() getchar()
#define Me(x,y) memset(x,y,sizeof(x))
#define Mc(x,y) memcpy(x,y,sizeof(x))
#define d(x,y) ((m)*(x-1)+(y))
#define R(n) (rnd()%(n)+1)
#define Pc(x) putchar(x)
#define LB lower_bound
#define UB upper_bound
#define fi first
#define se second
#define eb emplace_back
#define all(x) x.begin(),x.end()
using namespace std;using ll=long long;using db=double;using lb=long db;using ui=unsigned;using ull=unsigned long long;using pii=pair<int,int>;
const int N=2e3+5,M=(1<<8)+5,K=1000+5,mod=1e9+7,Mod=mod-1;const db eps=1e-9;const int INF=1e9+7;mt19937 rnd(28382);
#define Tp template<typename T>
#define Ts template<typename T,typename... Ar>
namespace Debug{
	Tp void _debug(char* f,T t){cerr<<f<<'='<<t<<endl;}
	Ts void _debug(char* f,T x,Ar... y){while(*f!=',') cerr<<*f++;cerr<<'='<<x<<",";_debug(f+1,y...);}
	#ifdef LOCAL
	#define gdb(...) _debug((char*)#__VA_ARGS__,__VA_ARGS__)
	#else 
	#define gdb(...) void()
	#endif
}using namespace Debug;
int n,k,A[N];
ll C[N][N];
void Solve(){
	scanf("%d%d",&n,&k);
	for(int i=1;i<=n;i++) scanf("%d",&A[i]);
	sort(A+1,A+n+1);
	for(int i=0;i<=n;i++) for(int j=C[i][0]=1;j<=n;j++) C[i][j]=(C[i-1][j]+C[i-1][j-1])%mod;
	if(A[1]==A[n]){
		printf("0 %lld\n",C[n][k]*C[n-k][k]%mod*(mod+1>>1)%mod);
		return;
	}
	ll sum=0;
	for(int i=1;i<=k;i++) sum+=A[n-i+1]-A[i];
	ll ans=0;
	if(A[k]==A[n-k+1]){
		int l=k,r=n-k+1;
		while(A[l-1]==A[l]) l--;
		while(A[r+1]==A[r]) r++;
		ans=C[r-l+1][k-(l-1)]*C[r-l+1-(k-(l-1))][k-(n-r)]%mod;
	}else{
		int l=k,r=k;
		while(A[l-1]==A[l]) l--;
		while(A[r+1]==A[r]) r++;
		ans=C[r-l+1][k-(l-1)];
		l=n-k+1,r=n-k+1;
		while(A[l-1]==A[l]) l--;
		while(A[r+1]==A[r]) r++;
		ans=ans*C[r-l+1][k-(n-r)]%mod;
	}
	printf("%lld %lld\n",sum,ans);
}
int main(){
	int t=1;
	// scanf("%d",&t);
	while(t--) Solve();
	cerr<<clock()*1.0/CLOCKS_PER_SEC<<'\n';
}

詳細信息

Test #1:

score: 0
Wrong Answer
time: 0ms
memory: 4100kb

input:

6 2
2 5 7 2 5 2

output:

8 608263266

result:

wrong answer 2nd numbers differ - expected: '6', found: '608263266'