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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#359828#8171. ColaDelay_for_five_minutes#AC ✓236ms238108kbC++201.3kb2024-03-20 21:34:592024-03-20 21:35:00

Judging History

你现在查看的是最新测评结果

  • [2024-03-20 21:35:00]
  • 评测
  • 测评结果:AC
  • 用时:236ms
  • 内存:238108kb
  • [2024-03-20 21:34:59]
  • 提交

answer

#include <bits/stdc++.h>
using namespace std;
const int mod = 998244353;
int inv[20000005];
int n , m;
int t[20000005] , rt[20000005];
int fpow(int a,int b) {
    int ans = 1;
    while(b) {
        if(b & 1) ans = 1LL * ans * a %mod;
        a = 1LL * a * a %mod;b >>= 1;
    }
    return ans;
}
int C(int a,int b) {
    return 1LL * t[a] * rt[b] % mod * rt[a - b] % mod;
}
int C_(int a,int b) {
    return C(a + b - 1 , b) ;
}
int ans = 0;
typedef long long ll;
void calc(int s,int v) {
    if(s > m - 1) return ;
    // printf("%d %d\n",s,v) ;
    int sol = C_(m - 1 - s + 1 , n) ;
    // printf("SOL %d\n",sol) ;
    ans = ((ll)ans + sol * v + mod) % mod;
}
int main() {
    ios::sync_with_stdio(false) ; cin.tie(0) ;
    cin >>n >> m ; 
    inv[1] = 1;rt[0] =rt[1] = 1;
    t[0] = t[1] = 1;
    for(int i = 2;i <= n + m + 2;i++) {
        inv[i] = (1LL * inv[mod % i] * (mod - mod / i)) % mod;
        rt[i] = 1LL * rt[i - 1] * inv[i] % mod;
        t[i] = 1LL * t[i - 1] * i % mod;
    }
    for(int i = 0;1LL * i *(3*i - 1) / 2 <= m;i++) {
        calc(i * (3 * i - 1) / 2 , ((i & 1) ? (-1) : 1)) ;
        if(i) calc(i * (3 * i + 1) / 2 , ((i & 1) ? (-1) : 1)) ;
    }
    // cout << ans << '\n' ;
    ans = 1LL * ans * rt[n ] % mod;
    cout << ans;
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 0ms
memory: 7780kb

input:

2 1

output:

499122177

result:

ok "499122177"

Test #2:

score: 0
Accepted
time: 1ms
memory: 7768kb

input:

1 1

output:

1

result:

ok "1"

Test #3:

score: 0
Accepted
time: 1ms
memory: 7780kb

input:

167 91

output:

469117530

result:

ok "469117530"

Test #4:

score: 0
Accepted
time: 214ms
memory: 229956kb

input:

9806463 8975779

output:

125384417

result:

ok "125384417"

Test #5:

score: 0
Accepted
time: 179ms
memory: 218788kb

input:

9138576 8731432

output:

306972756

result:

ok "306972756"

Test #6:

score: 0
Accepted
time: 195ms
memory: 233568kb

input:

9978791 9033584

output:

932159263

result:

ok "932159263"

Test #7:

score: 0
Accepted
time: 227ms
memory: 235956kb

input:

9811954 9790000

output:

404679920

result:

ok "404679920"

Test #8:

score: 0
Accepted
time: 208ms
memory: 231712kb

input:

9685105 9276909

output:

32996715

result:

ok "32996715"

Test #9:

score: 0
Accepted
time: 215ms
memory: 237980kb

input:

10000000 10000000

output:

309225852

result:

ok "309225852"

Test #10:

score: 0
Accepted
time: 210ms
memory: 238060kb

input:

10000000 9999999

output:

635234302

result:

ok "635234302"

Test #11:

score: 0
Accepted
time: 210ms
memory: 238036kb

input:

10000000 9999998

output:

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result:

ok "239117935"

Test #12:

score: 0
Accepted
time: 186ms
memory: 238064kb

input:

10000000 9999997

output:

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result:

ok "294859983"

Test #13:

score: 0
Accepted
time: 201ms
memory: 238108kb

input:

9999999 9999999

output:

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result:

ok "305530110"

Test #14:

score: 0
Accepted
time: 225ms
memory: 238104kb

input:

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output:

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result:

ok "164959553"

Test #15:

score: 0
Accepted
time: 230ms
memory: 238044kb

input:

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output:

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result:

ok "532215262"

Test #16:

score: 0
Accepted
time: 203ms
memory: 238060kb

input:

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output:

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result:

ok "123628609"

Test #17:

score: 0
Accepted
time: 221ms
memory: 237972kb

input:

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output:

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result:

ok "223852357"

Test #18:

score: 0
Accepted
time: 218ms
memory: 238056kb

input:

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output:

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result:

ok "75877991"

Test #19:

score: 0
Accepted
time: 236ms
memory: 238064kb

input:

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output:

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result:

ok "494540335"

Test #20:

score: 0
Accepted
time: 209ms
memory: 238060kb

input:

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output:

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result:

ok "19191738"

Test #21:

score: 0
Accepted
time: 200ms
memory: 237988kb

input:

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output:

238385746

result:

ok "238385746"

Test #22:

score: 0
Accepted
time: 215ms
memory: 238032kb

input:

9999997 9999996

output:

138191521

result:

ok "138191521"

Test #23:

score: 0
Accepted
time: 216ms
memory: 238068kb

input:

9999997 9999995

output:

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result:

ok "721536184"

Test #24:

score: 0
Accepted
time: 223ms
memory: 237980kb

input:

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output:

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result:

ok "627112720"

Test #25:

score: 0
Accepted
time: 71ms
memory: 126452kb

input:

8113616 1826492

output:

629546539

result:

ok "629546539"

Test #26:

score: 0
Accepted
time: 96ms
memory: 144760kb

input:

7230333 4233627

output:

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result:

ok "870135249"

Test #27:

score: 0
Accepted
time: 216ms
memory: 236036kb

input:

9734872 9617286

output:

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result:

ok "780426509"

Test #28:

score: 0
Accepted
time: 105ms
memory: 162336kb

input:

6780022 6393958

output:

508662111

result:

ok "508662111"

Test #29:

score: 0
Accepted
time: 51ms
memory: 92280kb

input:

4986441 1909344

output:

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result:

ok "762587564"

Test #30:

score: 0
Accepted
time: 83ms
memory: 126728kb

input:

9936540 91728

output:

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result:

ok "651924678"

Test #31:

score: 0
Accepted
time: 82ms
memory: 119208kb

input:

9099529 94239

output:

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result:

ok "775532638"

Test #32:

score: 0
Accepted
time: 70ms
memory: 119880kb

input:

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output:

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result:

ok "474538902"

Test #33:

score: 0
Accepted
time: 54ms
memory: 122876kb

input:

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output:

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result:

ok "354024226"

Test #34:

score: 0
Accepted
time: 93ms
memory: 119416kb

input:

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output:

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result:

ok "858989558"

Test #35:

score: 0
Accepted
time: 93ms
memory: 126144kb

input:

10000000 100000

output:

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result:

ok "609345536"

Test #36:

score: 0
Accepted
time: 74ms
memory: 126236kb

input:

10000000 99999

output:

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result:

ok "217258255"

Test #37:

score: 0
Accepted
time: 80ms
memory: 126496kb

input:

10000000 99998

output:

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result:

ok "485057696"

Test #38:

score: 0
Accepted
time: 80ms
memory: 126520kb

input:

10000000 99997

output:

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result:

ok "193579142"

Test #39:

score: 0
Accepted
time: 75ms
memory: 126668kb

input:

9999999 100000

output:

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result:

ok "584105896"

Test #40:

score: 0
Accepted
time: 94ms
memory: 126312kb

input:

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output:

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result:

ok "707014865"

Test #41:

score: 0
Accepted
time: 69ms
memory: 126388kb

input:

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output:

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result:

ok "872987417"

Test #42:

score: 0
Accepted
time: 91ms
memory: 126064kb

input:

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output:

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result:

ok "707304988"

Test #43:

score: 0
Accepted
time: 87ms
memory: 125952kb

input:

9999998 100000

output:

789028925

result:

ok "789028925"

Test #44:

score: 0
Accepted
time: 89ms
memory: 129120kb

input:

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output:

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result:

ok "628266237"

Test #45:

score: 0
Accepted
time: 95ms
memory: 127620kb

input:

9999998 99998

output:

38358057

result:

ok "38358057"

Test #46:

score: 0
Accepted
time: 80ms
memory: 129400kb

input:

9999998 99997

output:

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result:

ok "785931240"

Test #47:

score: 0
Accepted
time: 68ms
memory: 127524kb

input:

9999997 100000

output:

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result:

ok "945452715"

Test #48:

score: 0
Accepted
time: 62ms
memory: 129424kb

input:

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output:

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result:

ok "537126025"

Test #49:

score: 0
Accepted
time: 88ms
memory: 125720kb

input:

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output:

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result:

ok "837196653"

Test #50:

score: 0
Accepted
time: 86ms
memory: 126104kb

input:

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output:

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result:

ok "263045713"

Test #51:

score: 0
Accepted
time: 0ms
memory: 7772kb

input:

2 2

output:

1

result:

ok "1"

Test #52:

score: 0
Accepted
time: 0ms
memory: 7736kb

input:

3 3

output:

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result:

ok "831870295"

Test #53:

score: 0
Accepted
time: 1ms
memory: 7768kb

input:

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output:

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result:

ok "374341633"

Test #54:

score: 0
Accepted
time: 0ms
memory: 7752kb

input:

3 2

output:

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result:

ok "499122177"

Test #55:

score: 0
Accepted
time: 0ms
memory: 7788kb

input:

4 3

output:

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result:

ok "623902721"

Test #56:

score: 0
Accepted
time: 1ms
memory: 7756kb

input:

5 4

output:

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result:

ok "890101215"

Test #57:

score: 0
Accepted
time: 1ms
memory: 7784kb

input:

3 1

output:

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result:

ok "166374059"

Test #58:

score: 0
Accepted
time: 1ms
memory: 7784kb

input:

4 2

output:

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result:

ok "166374059"

Test #59:

score: 0
Accepted
time: 1ms
memory: 7784kb

input:

5 3

output:

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result:

ok "16637406"

Test #60:

score: 0
Accepted
time: 1ms
memory: 7764kb

input:

6 4

output:

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result:

ok "508827330"

Test #61:

score: 0
Accepted
time: 1ms
memory: 7772kb

input:

4 1

output:

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result:

ok "291154603"

Test #62:

score: 0
Accepted
time: 1ms
memory: 7768kb

input:

5 2

output:

291154603

result:

ok "291154603"

Test #63:

score: 0
Accepted
time: 1ms
memory: 7828kb

input:

6 3

output:

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result:

ok "859599304"

Test #64:

score: 0
Accepted
time: 1ms
memory: 7832kb

input:

7 4

output:

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result:

ok "694809760"

Test #65:

score: 0
Accepted
time: 43ms
memory: 75196kb

input:

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output:

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result:

ok "327294391"

Test #66:

score: 0
Accepted
time: 0ms
memory: 12724kb

input:

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output:

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result:

ok "27573951"

Test #67:

score: 0
Accepted
time: 79ms
memory: 112952kb

input:

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output:

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result:

ok "393785113"

Test #68:

score: 0
Accepted
time: 7ms
memory: 22332kb

input:

1076972 58637

output:

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result:

ok "600806929"

Test #69:

score: 0
Accepted
time: 0ms
memory: 15312kb

input:

463217 39187

output:

408712022

result:

ok "408712022"

Extra Test:

score: 0
Extra Test Passed