QOJ.ac

QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#322274#8171. ColaDaiRuiChen007AC ✓184ms316468kbC++17759b2024-02-06 18:01:202024-02-06 18:01:21

Judging History

你现在查看的是最新测评结果

  • [2024-02-06 18:01:21]
  • 评测
  • 测评结果：AC
  • 用时：184ms
  • 内存：316468kb
查看
  • [2024-02-06 18:01:20]
  • 提交

answer

#include<bits/stdc++.h>
#define ll long long
using namespace std;
const int MAXN=2e7+5,MOD=998244353;
ll fac[MAXN],ifac[MAXN];
ll ksm(ll a,ll b=MOD-2,ll p=MOD) {
	ll ret=1;
	for(;b;a=a*a%p,b=b>>1) if(b&1) ret=ret*a%p;
	return ret;
}
ll binom(ll n,ll m) {
	return fac[n]*ifac[n-m]%MOD*ifac[m]%MOD;
}
int eu(int i) { return i*(3*i-1)/2; }
signed main() {
	fac[0]=1;
	for(int i=1;i<MAXN;++i) fac[i]=fac[i-1]*i%MOD;
	ifac[MAXN-1]=ksm(fac[MAXN-1]);
	for(int i=MAXN-1;i;--i) ifac[i-1]=ifac[i]*i%MOD;
	int n,m;
	ll ans=0;
	scanf("%d%d",&n,&m);
	for(int i=0;eu(i)<m;++i) {
		ans+=(i&1?-1:1)*binom(n+m-eu(i)-1,n);
	}
	for(int i=-1;eu(i)<m;--i) {
		ans+=(i&1?-1:1)*binom(n+m-eu(i)-1,n);
	}
	printf("%lld\n",(ans%MOD+MOD)%MOD*ifac[n]%MOD);
}
Source code, Language: C++17

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 161ms
memory: 316468kb

input:

2 1

output:

499122177

result:

ok "499122177"

Test #2:

score: 0
Accepted
time: 147ms
memory: 316428kb

input:

1 1

output:

1

result:

ok "1"

Test #3:

score: 0
Accepted
time: 171ms
memory: 316284kb

input:

167 91

output:

469117530

result:

ok "469117530"

Test #4:

score: 0
Accepted
time: 174ms
memory: 316360kb

input:

9806463 8975779

output:

125384417

result:

ok "125384417"

Test #5:

score: 0
Accepted
time: 116ms
memory: 316400kb

input:

9138576 8731432

output:

306972756

result:

ok "306972756"

Test #6:

score: 0
Accepted
time: 159ms
memory: 316460kb

input:

9978791 9033584

output:

932159263

result:

ok "932159263"

Test #7:

score: 0
Accepted
time: 161ms
memory: 316328kb

input:

9811954 9790000

output:

404679920

result:

ok "404679920"

Test #8:

score: 0
Accepted
time: 166ms
memory: 316420kb

input:

9685105 9276909

output:

32996715

result:

ok "32996715"

Test #9:

score: 0
Accepted
time: 169ms
memory: 316280kb

input:

10000000 10000000

output:

309225852

result:

ok "309225852"

Test #10:

score: 0
Accepted
time: 165ms
memory: 316328kb

input:

10000000 9999999

output:

635234302

result:

ok "635234302"

Test #11:

score: 0
Accepted
time: 182ms
memory: 316336kb

input:

10000000 9999998

output:

239117935

result:

ok "239117935"

Test #12:

score: 0
Accepted
time: 153ms
memory: 316336kb

input:

10000000 9999997

output:

294859983

result:

ok "294859983"

Test #13:

score: 0
Accepted
time: 181ms
memory: 316340kb

input:

9999999 9999999

output:

305530110

result:

ok "305530110"

Test #14:

score: 0
Accepted
time: 165ms
memory: 316344kb

input:

9999999 9999998

output:

164959553

result:

ok "164959553"

Test #15:

score: 0
Accepted
time: 154ms
memory: 316360kb

input:

9999999 9999997

output:

532215262

result:

ok "532215262"

Test #16:

score: 0
Accepted
time: 154ms
memory: 316284kb

input:

9999999 9999996

output:

123628609

result:

ok "123628609"

Test #17:

score: 0
Accepted
time: 136ms
memory: 316284kb

input:

9999998 9999998

output:

223852357

result:

ok "223852357"

Test #18:

score: 0
Accepted
time: 128ms
memory: 316460kb

input:

9999998 9999997

output:

75877991

result:

ok "75877991"

Test #19:

score: 0
Accepted
time: 152ms
memory: 316280kb

input:

9999998 9999996

output:

494540335

result:

ok "494540335"

Test #20:

score: 0
Accepted
time: 182ms
memory: 316336kb

input:

9999998 9999995

output:

19191738

result:

ok "19191738"

Test #21:

score: 0
Accepted
time: 144ms
memory: 316460kb

input:

9999997 9999997

output:

238385746

result:

ok "238385746"

Test #22:

score: 0
Accepted
time: 163ms
memory: 316356kb

input:

9999997 9999996

output:

138191521

result:

ok "138191521"

Test #23:

score: 0
Accepted
time: 143ms
memory: 316464kb

input:

9999997 9999995

output:

721536184

result:

ok "721536184"

Test #24:

score: 0
Accepted
time: 172ms
memory: 316416kb

input:

9999997 9999994

output:

627112720

result:

ok "627112720"

Test #25:

score: 0
Accepted
time: 124ms
memory: 316412kb

input:

8113616 1826492

output:

629546539

result:

ok "629546539"

Test #26:

score: 0
Accepted
time: 164ms
memory: 316276kb

input:

7230333 4233627

output:

870135249

result:

ok "870135249"

Test #27:

score: 0
Accepted
time: 100ms
memory: 316344kb

input:

9734872 9617286

output:

780426509

result:

ok "780426509"

Test #28:

score: 0
Accepted
time: 142ms
memory: 316284kb

input:

6780022 6393958

output:

508662111

result:

ok "508662111"

Test #29:

score: 0
Accepted
time: 156ms
memory: 316280kb

input:

4986441 1909344

output:

762587564

result:

ok "762587564"

Test #30:

score: 0
Accepted
time: 167ms
memory: 316344kb

input:

9936540 91728

output:

651924678

result:

ok "651924678"

Test #31:

score: 0
Accepted
time: 136ms
memory: 316416kb

input:

9099529 94239

output:

775532638

result:

ok "775532638"

Test #32:

score: 0
Accepted
time: 124ms
memory: 316464kb

input:

9564814 93545

output:

474538902

result:

ok "474538902"

Test #33:

score: 0
Accepted
time: 184ms
memory: 316428kb

input:

9707744 92094

output:

354024226

result:

ok "354024226"

Test #34:

score: 0
Accepted
time: 128ms
memory: 316412kb

input:

9167687 94820

output:

858989558

result:

ok "858989558"

Test #35:

score: 0
Accepted
time: 171ms
memory: 316428kb

input:

10000000 100000

output:

609345536

result:

ok "609345536"

Test #36:

score: 0
Accepted
time: 139ms
memory: 316424kb

input:

10000000 99999

output:

217258255

result:

ok "217258255"

Test #37:

score: 0
Accepted
time: 141ms
memory: 316464kb

input:

10000000 99998

output:

485057696

result:

ok "485057696"

Test #38:

score: 0
Accepted
time: 161ms
memory: 316460kb

input:

10000000 99997

output:

193579142

result:

ok "193579142"

Test #39:

score: 0
Accepted
time: 181ms
memory: 316416kb

input:

9999999 100000

output:

584105896

result:

ok "584105896"

Test #40:

score: 0
Accepted
time: 176ms
memory: 316328kb

input:

9999999 99999

output:

707014865

result:

ok "707014865"

Test #41:

score: 0
Accepted
time: 126ms
memory: 316376kb

input:

9999999 99998

output:

872987417

result:

ok "872987417"

Test #42:

score: 0
Accepted
time: 162ms
memory: 316332kb

input:

9999999 99997

output:

707304988

result:

ok "707304988"

Test #43:

score: 0
Accepted
time: 153ms
memory: 316428kb

input:

9999998 100000

output:

789028925

result:

ok "789028925"

Test #44:

score: 0
Accepted
time: 165ms
memory: 316460kb

input:

9999998 99999

output:

628266237

result:

ok "628266237"

Test #45:

score: 0
Accepted
time: 153ms
memory: 316464kb

input:

9999998 99998

output:

38358057

result:

ok "38358057"

Test #46:

score: 0
Accepted
time: 164ms
memory: 316280kb

input:

9999998 99997

output:

785931240

result:

ok "785931240"

Test #47:

score: 0
Accepted
time: 147ms
memory: 316308kb

input:

9999997 100000

output:

945452715

result:

ok "945452715"

Test #48:

score: 0
Accepted
time: 148ms
memory: 316276kb

input:

9999997 99999

output:

537126025

result:

ok "537126025"

Test #49:

score: 0
Accepted
time: 164ms
memory: 316424kb

input:

9999997 99998

output:

837196653

result:

ok "837196653"

Test #50:

score: 0
Accepted
time: 172ms
memory: 316424kb

input:

9999997 99997

output:

263045713

result:

ok "263045713"

Test #51:

score: 0
Accepted
time: 160ms
memory: 316428kb

input:

2 2

output:

1

result:

ok "1"

Test #52:

score: 0
Accepted
time: 164ms
memory: 316412kb

input:

3 3

output:

831870295

result:

ok "831870295"

Test #53:

score: 0
Accepted
time: 152ms
memory: 316464kb

input:

4 4

output:

374341633

result:

ok "374341633"

Test #54:

score: 0
Accepted
time: 172ms
memory: 316344kb

input:

3 2

output:

499122177

result:

ok "499122177"

Test #55:

score: 0
Accepted
time: 140ms
memory: 316408kb

input:

4 3

output:

623902721

result:

ok "623902721"

Test #56:

score: 0
Accepted
time: 164ms
memory: 316424kb

input:

5 4

output:

890101215

result:

ok "890101215"

Test #57:

score: 0
Accepted
time: 118ms
memory: 316464kb

input:

3 1

output:

166374059

result:

ok "166374059"

Test #58:

score: 0
Accepted
time: 128ms
memory: 316416kb

input:

4 2

output:

166374059

result:

ok "166374059"

Test #59:

score: 0
Accepted
time: 156ms
memory: 316344kb

input:

5 3

output:

16637406

result:

ok "16637406"

Test #60:

score: 0
Accepted
time: 148ms
memory: 316460kb

input:

6 4

output:

508827330

result:

ok "508827330"

Test #61:

score: 0
Accepted
time: 179ms
memory: 316424kb

input:

4 1

output:

291154603

result:

ok "291154603"

Test #62:

score: 0
Accepted
time: 159ms
memory: 316428kb

input:

5 2

output:

291154603

result:

ok "291154603"

Test #63:

score: 0
Accepted
time: 179ms
memory: 316304kb

input:

6 3

output:

859599304

result:

ok "859599304"

Test #64:

score: 0
Accepted
time: 163ms
memory: 316344kb

input:

7 4

output:

694809760

result:

ok "694809760"

Test #65:

score: 0
Accepted
time: 152ms
memory: 316404kb

input:

5629201 38642

output:

327294391

result:

ok "327294391"

Test #66:

score: 0
Accepted
time: 152ms
memory: 316428kb

input:

126092 74219

output:

27573951

result:

ok "27573951"

Test #67:

score: 0
Accepted
time: 116ms
memory: 316288kb

input:

8593075 8689

output:

393785113

result:

ok "393785113"

Test #68:

score: 0
Accepted
time: 171ms
memory: 316464kb

input:

1076972 58637

output:

600806929

result:

ok "600806929"

Test #69:

score: 0
Accepted
time: 112ms
memory: 316420kb

input:

463217 39187

output:

408712022

result:

ok "408712022"

Extra Test:

score: 0
Extra Test Passed
English 繁體中文 简体中文

Server Time: 2024-12-05 00:54:16 | OpenSource Project