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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#571477#9309. GraphUSTC_fish_touching_teamAC ✓296ms31296kbC++141.7kb2024-09-17 23:23:572024-09-17 23:23:58

Judging History

你现在查看的是最新测评结果

  • [2024-09-17 23:23:58]
  • 评测
  • 测评结果:AC
  • 用时:296ms
  • 内存:31296kb
  • [2024-09-17 23:23:57]
  • 提交

answer

#include<cstdio>
#include<cstring>
#include<iostream>
#include<cmath>
#define LL long long
#define FOR(i,x,y) for(int i=x;i<y;i++)
using namespace std;

namespace min25{
	const int M=2e6+100;
	LL B,N;
	
	inline LL pg(LL x){return 1;}
	inline LL psg(LL x){return x-1;}
	
	LL pr[M],pc,sg[M];
	void get_prime(LL n){
		static bool vis[M];pc=0;
		FOR(i,2,n+1){
			if(!vis[i]){
				pr[pc++]=i;
				sg[pc]=(sg[pc-1]+pg(i));
			}
			FOR(j,0,pc){
				if(pr[j]*i>n)break;
				vis[pr[j]*i]=1;
				if(i%pr[j]==0)break;
			}
		}
	}
	
	LL w[M];
	LL id1[M],id2[M],g[M];
	inline LL id(LL x){
		return x<=B?id1[x]:id2[N/x];
	}
	
	void solve(LL _N){
		N=_N;
		B=sqrt(N+5);
		get_prime(B);
		int sz=0;
		for(LL l=1,v,r;l<=N;l=r+1){
			v=N/l;r=N/v;
			w[sz]=v;g[sz]=psg(v);
			if(v<=B)id1[v]=sz;
			else id2[r]=sz;
			sz++;
		}
		
		FOR(k,0,pc){
			LL p=pr[k];
			FOR(i,0,sz){
				LL v=w[i];if(p*p>v)break;
				LL t=id(v/p);
				g[i]=(g[i]-(g[t]-sg[k])*pg(p));
			}
		}
	}
	
	LL calc(LL l,LL r){
		return g[id(r)]-g[id(l-1)];
	}
}

const LL mod=998244353;

LL Pow(LL a,LL b){
	LL r=1;a%=mod; 
	while(b){
		if(b&1)r=r*a%mod;
		b>>=1; a=a*a%mod;
	}
	return r;
}

LL solve(LL n){
	if(n==1)return 0; 
	return min25::calc(n/2+1,n);
}

LL n;
int main(){
	scanf("%lld",&n);
	
	
	min25::solve(n);
	
	LL res=1;
	for(LL l=1,v,r;l<=n;l=r+1){
		v=n/l,r=n/v;
		if(v<=2)break;
		
		LL g=solve(v)+1;
//		printf("v=%lld g=%lld l=%lld\n",v,g,l);
//		printf("l=%lld v=%lld b=%lld\n",l,v,b);
		LL val=Pow(v,g-1)*((v-g)%mod)%mod;
		if(v==g)val=Pow(v,g-2);
		res=res*Pow(val,r-l+1)%mod;
	}
	
	printf("%lld",(res%mod+mod)%mod);
}

这程序好像有点Bug,我给组数据试试?

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 2ms
memory: 14040kb

input:

4

output:

8

result:

ok answer is '8'

Test #2:

score: 0
Accepted
time: 2ms
memory: 11928kb

input:

2

output:

1

result:

ok answer is '1'

Test #3:

score: 0
Accepted
time: 0ms
memory: 13976kb

input:

123

output:

671840470

result:

ok answer is '671840470'

Test #4:

score: 0
Accepted
time: 2ms
memory: 14032kb

input:

233

output:

353738465

result:

ok answer is '353738465'

Test #5:

score: 0
Accepted
time: 2ms
memory: 14112kb

input:

5981

output:

970246821

result:

ok answer is '970246821'

Test #6:

score: 0
Accepted
time: 0ms
memory: 14128kb

input:

86422

output:

897815688

result:

ok answer is '897815688'

Test #7:

score: 0
Accepted
time: 2ms
memory: 14044kb

input:

145444

output:

189843901

result:

ok answer is '189843901'

Test #8:

score: 0
Accepted
time: 0ms
memory: 13996kb

input:

901000

output:

819449452

result:

ok answer is '819449452'

Test #9:

score: 0
Accepted
time: 0ms
memory: 14196kb

input:

1000000

output:

113573943

result:

ok answer is '113573943'

Test #10:

score: 0
Accepted
time: 1ms
memory: 14120kb

input:

23333333

output:

949849384

result:

ok answer is '949849384'

Test #11:

score: 0
Accepted
time: 3ms
memory: 14204kb

input:

102850434

output:

604886751

result:

ok answer is '604886751'

Test #12:

score: 0
Accepted
time: 16ms
memory: 14664kb

input:

998244353

output:

0

result:

ok answer is '0'

Test #13:

score: 0
Accepted
time: 12ms
memory: 14704kb

input:

1000000007

output:

318420284

result:

ok answer is '318420284'

Test #14:

score: 0
Accepted
time: 21ms
memory: 18816kb

input:

2147483547

output:

688759898

result:

ok answer is '688759898'

Test #15:

score: 0
Accepted
time: 34ms
memory: 17328kb

input:

5120103302

output:

116870489

result:

ok answer is '116870489'

Test #16:

score: 0
Accepted
time: 101ms
memory: 22416kb

input:

19834593299

output:

523663743

result:

ok answer is '523663743'

Test #17:

score: 0
Accepted
time: 189ms
memory: 27004kb

input:

52500109238

output:

195086665

result:

ok answer is '195086665'

Test #18:

score: 0
Accepted
time: 264ms
memory: 29720kb

input:

84848352911

output:

107959260

result:

ok answer is '107959260'

Test #19:

score: 0
Accepted
time: 294ms
memory: 31296kb

input:

99824435322

output:

0

result:

ok answer is '0'

Test #20:

score: 0
Accepted
time: 294ms
memory: 29912kb

input:

99999999354

output:

316301711

result:

ok answer is '316301711'

Test #21:

score: 0
Accepted
time: 296ms
memory: 29996kb

input:

100000000000

output:

396843576

result:

ok answer is '396843576'

Extra Test:

score: 0
Extra Test Passed