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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
#631926#9451. Expected Waiting Timeucup-team4863#WA 301ms30708kbC++141.9kb2024-10-12 11:02:372024-10-12 11:02:38

Judging History

你现在查看的是最新测评结果

  • [2024-10-12 11:02:38]
  • 评测
  • 测评结果:WA
  • 用时:301ms
  • 内存:30708kb
  • [2024-10-12 11:02:37]
  • 提交

answer

// created:  2024-10-12 08:55:42
#include<cstdio>
#include<cctype>
#include<algorithm>
#define F(i,l,r) for(int i=l,i##_end=r;i<i##_end;++i)
#define I128 //||is_same<T,__int128_t>::value||is_same<T,__uint128_t>::value
using namespace std;
template<typename T>enable_if_t<is_integral<T>::value I128,void> readmain(T &x)
{
	bool neg=false;int c=getchar();
	for(;!isdigit(c);c=getchar())if(c=='-')neg=true;
	for(x=0;isdigit(c);c=getchar())x=(T)(10*x+(c-'0'));
	if(neg)x=-x;
}
template<typename T>T& read(T &x){readmain(x);return x;}
template<typename T,typename ...Tr>void read(T &x,Tr&... r){readmain(x);read(r...);}
typedef __uint128_t u128;
typedef unsigned long long ull;
constexpr int N=2e6+5;int mod;
void reduce(int &x){if(x>=mod)x-=mod;}
struct barrett
{
	ull mod,inv;
	void init(int mod_){mod=mod_;inv=(-1ull)/mod+1ull;}
	int operator()(ull x)
	{
		x-=(ull)((u128)x*inv>>64)*mod;
		if(x>>63)x+=mod;
		return (int)x;
	}
}bar;
int qpow(int a,int b,int c=1)
{
	for(;b;b>>=1,a=bar((ull)a*a))if(b&1)c=bar((ull)c*a);
	return c;
}
int fac[N],invfac[N];
int n,a[N],cat[N];
void gen()
{
	int b0,ca,cb,sa=0;
	read(b0,ca,cb);
	F(i,0,n)
	{
		b0=bar((ull)ca*b0+cb);
		reduce(sa+=b0+1);
		a[i]=sa;
	}
}
void initfac()
{
	F(i,fac[0]=1,n+1)fac[i]=bar((ull)fac[i-1]*i);
	invfac[n]=qpow(fac[n],mod-2);
	for(int i=n;i;--i)invfac[i-1]=bar((ull)invfac[i]*i);
}
void solve()
{
	read(n,mod);
	bar.init(mod);
	n<<=1;
	gen();initfac();
	n>>=1;
	F(i,0,n+1)cat[i]=bar((ull)bar((ull)fac[2*i]*invfac[i])*invfac[i+1]);
	int ans=0,tot=cat[n];
	int ho=tot;
	F(i,0,n)
	{
		if(i&1)ho=bar(ho+(ull)(mod-cat[i>>1])*cat[n-1-(i>>1)]);
		ans=bar(ans+(tot+2ull*(mod-ho))*(a[i]+mod-a[2*n-1-i]));
	}
	ans=bar((ull)ans*invfac[2*n]);
	ans=bar((ull)ans*fac[n]);ans=bar((ull)ans*fac[n+1]);
	printf("%d\n",ans);
}
int main()
{
	int tt;
	read(tt);
	while(tt--)solve();
	return 0;
}

详细

Test #1:

score: 100
Accepted
time: 1ms
memory: 7656kb

input:

5
1 1000000007 0 1 0
2 1000000007 0 1 1
2 7 5 2 3
3 31 15 6 24
20 1000000007 0 1 0

output:

1
12
1
21
879705565

result:

ok 5 number(s): "1 12 1 21 879705565"

Test #2:

score: 0
Accepted
time: 293ms
memory: 7632kb

input:

4400
3954 1000000007 0 1 0
1306 1000000007 0 1 0
3774 1000000007 0 1 0
3345 1000000007 0 1 0
891 1000000007 0 1 0
2462 1000000007 0 1 0
237 1000000007 0 1 0
26 1000000007 0 1 0
2510 1000000007 0 1 0
637 1000000007 0 1 0
3250 1000000007 0 1 0
3447 1000000007 0 1 0
1222 1000000007 0 1 0
133 1000000007...

output:

440618338
378292891
979368645
915766295
343598158
80867595
161627927
517387931
396936703
42785642
945720545
764273281
186237656
635777911
164064906
548455037
991964184
468137124
561243246
118562285
856945294
642467240
23673926
808943705
897417615
462422554
656411244
204288121
997894281
244685651
762...

result:

ok 4400 numbers

Test #3:

score: -100
Wrong Answer
time: 301ms
memory: 30708kb

input:

1019
338 1863833207 1820742817 1507924477 1822273457
770 1386304741 1088481071 1216187083 170973217
597 1604266739 620750027 196415899 456280997
105 1008587891 184044403 24836083 926135599
357 1165127407 440925347 1103369747 912263123
82 1639766993 263045351 631010551 1412721139
928 1715915153 25383...

output:

373412135
909478089
988735502
827110887
310057771
105970079
1592944624
17236634
1167212295
521144008
1009499206
580644886
405149419
1559150541
500656729
29114938
470634881
322958100
441888172
835750076
747526883
1671785296
1089271112
894559715
558752169
1050819260
65894588
844160548
966608592
478142...

result:

wrong answer 1st numbers differ - expected: '1532578211', found: '373412135'