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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
#99610#6344. The Best Problem of 2021xiaoyaowudiWA 134ms63936kbC++174.4kb2023-04-23 08:23:492023-04-23 08:23:53

Judging History

你现在查看的是最新测评结果

  • [2023-08-10 23:21:45]
  • System Update: QOJ starts to keep a history of the judgings of all the submissions.
  • [2023-04-23 08:23:53]
  • 评测
  • 测评结果:WA
  • 用时:134ms
  • 内存:63936kb
  • [2023-04-23 08:23:49]
  • 提交

answer

#include <iostream>
#include <algorithm>
#include <bitset>
constexpr int N(2010),p(998244353);
std::bitset<N> b[N];bool hv[N];
int fp(int a,int b){int ans(1),off(a);while(b){if(b&1) ans=1ll*ans*off%p;off=1ll*off*off%p;b>>=1;}return ans;}
int main()
{
	std::ios::sync_with_stdio(false);
	std::cin.tie(nullptr);
	int n,m;
	std::cin>>n>>m;
	static std::bitset<N> a[N],xb;
	for(int i(1);i<=n;++i)
	{
		static char s[N];std::cin>>s;
		for(int j(0);j<m;++j)
		{
			a[i][m-j-1]=(s[j]=='1');
		}
		bool st(false);
		for(int j(m-1);j>=0;--j) if(a[i][j])
		{
			if(hv[j])
			{
				a[i]^=b[j];
			}
			else
			{
				hv[j]=st=true;
				b[j]=a[i];
				break;
			}
		}
		if(!st){std::cout<<0<<std::endl;return 0;}
	}
	{
		static char s[N];std::cin>>s;
		for(int j(0);j<m;++j) xb[m-j-1]=(s[j]=='1');
	}
	for(int i(m-1);i>=0;--i) if(hv[i]) for(int j(i+1);j<m;++j) if(hv[j] && b[j][i]) b[j]^=b[i];
	static int x[N];int cnt(0);
	static std::bitset<N> cur;
	for(int j(m-1);j>=0;--j) if(hv[j])
	{
		std::bitset<N> nw(cur^b[j]);
		bool cap(true);
		for(int t(m-1);t>=0;--t) if(xb[t]!=nw[t])
		{
			if(xb[t]<nw[t]) cap=false;
			break;
		}
		if(cap) cur=nw,x[++cnt]=1;
		else x[++cnt]=0;
	}
	if(!x[1]){std::cout<<0<<std::endl;}
	// {
	// 	++x[cnt];int t(cnt);
	// 	while(x[t]==2) x[t]=0,x[--t]+=1;
	// }
	// for(int i(1);i<=cnt;++i) std::cout<<x[i]<<" ";std::cout<<std::endl;
	static int p2[N],pp2[N],ip2[N],ipr[N][N],inv[N];p2[0]=1;pp2[0]=2;ip2[0]=1;
	constexpr int inv2((p+1)/2);
	static int f[N][N],g[N][N]/*,h[N][N]*/;
	for(int i(1);i<N;++i) p2[i]=2ll*p2[i-1]%p,pp2[i]=1ll*pp2[i-1]*pp2[i-1]%p,ip2[i]=1ll*ip2[i-1]*inv2%p;
	inv[1]=1;for(int i(2);i<N;++i) inv[i]=1ll*(p-p/i)*inv[p%i]%p;
	for(int i(0);i<N;++i){ipr[i][0]=1;for(int j(1);j<N;++j) ipr[i][j]=1ll*ipr[i][j-1]*ip2[i]%p;}
	static int pre[N][N],qf[N],iqf[N],jc[N];
	qf[0]=iqf[0]=1;for(int i(1);i<N;++i) qf[i]=1ll*qf[i-1]*(p2[i]-1)%p,iqf[i]=fp(qf[i],p-2);
	auto qb=[](int a,int b)->int{return 1ll*qf[a]*iqf[b]%p*iqf[a-b]%p;};
	jc[0]=1;
	// h[0][0]=1;
	// for(int i(1);i<=cnt;++i)
	// {
	// 	for(int j(1);)
	// }
	for(int i(1);i<=cnt;++i)
	{
		jc[i]=1;
		for(int j(1);j<=i;++j) jc[i]=1ll*jc[i]*p2[j-1]%p;
		// std::cerr<<jc[i]<<" ";
	}
	// std::cerr<<std::endl;
	for(int i(0);i<N;++i) for(int j(0);j<=i;++j) pre[i][j]=1ll*qb(i,j)*jc[j]%p;
	// for(int i(0);i<=cnt;++i) for(int j(0);j<=cnt;++j) std::cout<<pre[i][j]<<" \n"[j==cnt];
	// if(!x[0])
	// {
		f[cnt][0]=2;
		for(int i(cnt);i;--i)
		{
			int c(x[i]);
			for(int j(0);j<=cnt-i;++j)
			{
				// std::cerr<<i<<" "<<j<<" "<<f[i][j]<<std::endl;
				if(i<cnt && x[i+1]==1)
				{
					f[i][j]=(f[i][j]+1ll*ipr[cnt-i][j]*inv2%p*pp2[j]%p*pre[cnt-i-1][j])%p;
				}
				if(i<cnt && x[i+1]==0)
				{
					g[i][j]=(g[i][j]+1ll*ipr[cnt-i][j]*inv2%p*pre[cnt-i-1][j])%p;
				}
				// std::cerr<<i<<" "<<j<<" "<<g[i][j]<<std::endl;
				if(i==1) continue;
				g[i-1][j]=(g[i-1][j]+1ll*g[i][j]*ip2[j+1])%p;
				if(!c)
				{
					f[i-1][j+1]=(f[i-1][j+1]+1ll*ip2[j+1]*f[i][j])%p;
					f[i-1][j]=(f[i-1][j]+1ll*ip2[j+1]*f[i][j])%p;
					g[i-1][j+1]=(g[i-1][j+1]+1ll*g[i][j]*ip2[j+1])%p;
				}
				else
				{
					f[i-1][j]=(f[i-1][j]+1ll*ip2[j+1]*f[i][j])%p;
					f[i-1][j+1]=(f[i-1][j+1]+1ll*pp2[j]*ip2[j+1]%p*f[i][j])%p;
					f[i-1][j+1]=(f[i-1][j+1]+1ll*pp2[j]*ip2[j+2]%p*g[i][j])%p;
					g[i-1][j+1]=(g[i-1][j+1]+1ll*g[i][j]*ip2[j+2]%p*pp2[j])%p;
				}
			}
		}
		static int sum[N];
		sum[0]=1;
		for(int j(1);j<=cnt;++j)
		{
			sum[j]=(1ll*pp2[j]*pre[cnt-1][j]+1ll*pp2[j-1]*f[1][j-1]%p*fp(2,(cnt-1)*j)+1ll*pp2[j-1]*g[1][j-1]%p*fp(2,(cnt-1)*j))%p;
			// std::cerr<<(1ll*pp2[j-1]*f[1][j-1]%p*fp(2,(cnt-1)*j)+1ll*pp2[j-1]*g[1][j-1]%p*fp(2,(cnt-1)*j))%p<<std::endl;
			// std::cerr<<1ll*pp2[j-1]*f[1][j-1]%p*fp(2,(cnt-1)*j)<<std::endl;
			// std::cout<<sum[j]<<std::endl;
		}
		// std::cout<<std::endl;
		for(int j(1);j<=cnt;++j) sum[j]=1ll*sum[j]*fp(jc[j],p-2)%p*inv2%p/*,std::cout<<sum[j]<<" "*/;
		// std::cout<<std::endl;
		int ans(0);
		for(int j(0);j<=cnt;++j)
		{
			for(int k(0);k<j;++k)
			{
				sum[j]=(sum[j]+1ll*(p-sum[k])*qb(cnt-k,j-k))%p;
			}
			// std::cerr<<sum[j]<<" ";
		}
		// std::cerr<<std::endl;
		std::cout<<sum[cnt]<<std::endl;
	// }
	// else
	// {
	// 	int ans(0);
	// 	for(int j(0);j<=cnt;++j)
	// 	{
	// 		if((cnt-j)&1) ans=(ans+1ll*(p-pp2[j])*qb(cnt,j))%p;
	// 		else ans=(ans+1ll*pp2[j]*qb(cnt,j))%p;
	// 	}
	// 	std::cout<<ans<<std::endl;
	// }
	return 0;
}

详细

Test #1:

score: 100
Accepted
time: 25ms
memory: 39772kb

input:

4 4
0001
0010
0100
1000
1101

output:

7364

result:

ok 1 number(s): "7364"

Test #2:

score: 0
Accepted
time: 2ms
memory: 3344kb

input:

3 2
00
00
00
11

output:

0

result:

ok 1 number(s): "0"

Test #3:

score: 0
Accepted
time: 26ms
memory: 39736kb

input:

2 3
110
101
101

output:

1

result:

ok 1 number(s): "1"

Test #4:

score: 0
Accepted
time: 24ms
memory: 38380kb

input:

3 10
1111100110
0011110100
0101100001
1110000001

output:

38

result:

ok 1 number(s): "38"

Test #5:

score: 0
Accepted
time: 20ms
memory: 39508kb

input:

7 13
1000101001000
1000000010000
1010101011111
1001100100111
1111111101100
0101010101110
1101100010100
1000010011001

output:

744450298

result:

ok 1 number(s): "744450298"

Test #6:

score: 0
Accepted
time: 20ms
memory: 39744kb

input:

100 100
1111010111010001011111110010101001001101000000000000011000001100101000100011100011000000110000001010
1001001110111010100100010111100010111110101100101000010111001011111010111100111000000011101010100111
000011010111000100110100010010011101001111100110111000100101010001101100101011000111101101...

output:

19562313

result:

ok 1 number(s): "19562313"

Test #7:

score: 0
Accepted
time: 39ms
memory: 42180kb

input:

400 500
1011011011010010111110101001010011000100001111000111111111001111100010101011110011010010011100100100111111000111001110111100101010000000100100011011011001011100100000000100001100001010100010111000110011000100101001010110110100110101000011011011011100111110010100101000011001100000001100001000...

output:

681985268

result:

ok 1 number(s): "681985268"

Test #8:

score: 0
Accepted
time: 57ms
memory: 51040kb

input:

999 1997
011101110101100100111101100000000100001110010001010100011010111010101101011100001000010001110100110111101101010111010011101111011001011100110110101011111011000111101011011000010101100101001110000111010101111100000100100101110000111001010101110110000001111111100110110011110100101000011100011...

output:

435150194

result:

ok 1 number(s): "435150194"

Test #9:

score: 0
Accepted
time: 115ms
memory: 63584kb

input:

1901 2000
10000111000111010000000000100110001100110010011001101110001011000001011000010111101110111001111000010110110100010100010101011111011101100111010101010001010010111010001011000001011010100011000101101010001110111100000101110110011001101111101111000100001010011101011110001100110001100000111110...

output:

9254020

result:

ok 1 number(s): "9254020"

Test #10:

score: 0
Accepted
time: 134ms
memory: 63776kb

input:

1984 2000
11111101001011101001011011010011000001100000101000001001111000100010011011000110110110100000001100000000001111101001111010111110000000010000000111111001010111101101110000111110010111001011011111010010110001011100110101000110000100010100100101010111101100000011110010010100101011101001110110...

output:

870006511

result:

ok 1 number(s): "870006511"

Test #11:

score: 0
Accepted
time: 36ms
memory: 4504kb

input:

2000 2000
00010001100000101100000110010101010101110010001000000100010010110010001100110000001110100111010110100110101010101111011100001110100011001000010001000011100111010100110101000111010010010111001001101100100000101001111111001111101001000101001011101001010010010101011110111001101101101001001000...

output:

0

result:

ok 1 number(s): "0"

Test #12:

score: 0
Accepted
time: 35ms
memory: 39488kb

input:

11 11
10000000000
01000000000
00100000000
00010000000
00001000000
00000100000
00000010000
00000001000
00000000100
00000000010
00000000001
10111110000

output:

312889397

result:

ok 1 number(s): "312889397"

Test #13:

score: 0
Accepted
time: 31ms
memory: 38272kb

input:

100 100
1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
0100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
001000000000000000000000000000000000000000000000000000000000000000000000000000000000000000...

output:

554554135

result:

ok 1 number(s): "554554135"

Test #14:

score: 0
Accepted
time: 50ms
memory: 49988kb

input:

1000 1000
10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000...

output:

944188930

result:

ok 1 number(s): "944188930"

Test #15:

score: 0
Accepted
time: 103ms
memory: 63924kb

input:

1999 1999
10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000...

output:

753324940

result:

ok 1 number(s): "753324940"

Test #16:

score: 0
Accepted
time: 88ms
memory: 63860kb

input:

2000 2000
10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000...

output:

489943678

result:

ok 1 number(s): "489943678"

Test #17:

score: 0
Accepted
time: 99ms
memory: 63936kb

input:

2000 2000
10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000...

output:

458543942

result:

ok 1 number(s): "458543942"

Test #18:

score: 0
Accepted
time: 14ms
memory: 39576kb

input:

37 100
0000000000100000010101011000010111111000000000000000000000000000000000001110100110101000000010110000
0111100011011110101011110100101001011000000000110010001010110100000000010000100000111011000000100000
0001110011110000001100011000010011001000000000000000000000000000000000000000000000000000010...

output:

807297668

result:

ok 1 number(s): "807297668"

Test #19:

score: 0
Accepted
time: 28ms
memory: 39776kb

input:

71 93
100010100111111001011100000000011001101101010001011001110001101110010000001000001000000000011
110100111110010001000110000101111010111111000111011010100001010000010110011000000100000000000
110010010110000000010001010100000011000100000010011100100000100100101100010100001100000010000
000101010010...

output:

50935767

result:

ok 1 number(s): "50935767"

Test #20:

score: 0
Accepted
time: 2ms
memory: 5420kb

input:

101 114
010101111101011101100001000100001001000100011100111111110010001111101001100100000110100101010110000000000000001000
101010000011100100000001100000110000111001111011000010010101001011110110100101011101111111111110111010000000000000
11011100100101010100101100000101100000010100000010010110101010...

output:

0

result:

ok 1 number(s): "0"

Test #21:

score: 0
Accepted
time: 27ms
memory: 39560kb

input:

17 2000
0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010010101111100001010111000001111010110101100011000011011111110001011001011010111110111110000110011101111011010110101011010100110001111110110110101000101110100110011001000010000001010...

output:

526829746

result:

ok 1 number(s): "526829746"

Test #22:

score: 0
Accepted
time: 31ms
memory: 39784kb

input:

30 1999
0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000...

output:

708057099

result:

ok 1 number(s): "708057099"

Test #23:

score: -100
Wrong Answer
time: 28ms
memory: 38468kb

input:

54 2000
0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000...

output:

0
508205194

result:

wrong answer Output contains longer sequence [length = 2], but answer contains 1 elements