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QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#582987#9376. GameAil_ijyqWA 389ms3704kbC++141.3kb2024-09-22 17:55:522024-09-22 17:55:56

Judging History

你现在查看的是最新测评结果

  • [2024-09-22 17:55:56]
  • 评测
  • 测评结果:WA
  • 用时:389ms
  • 内存:3704kb
  • [2024-09-22 17:55:52]
  • 提交

answer

#include<bits/stdc++.h>
#define int long long
using namespace std;
const int mod=998244353;

int qmi(int a,int b,int q)
{
    int num=1;
    while(b)
    {
        if(b&1)
            num=a*num%q;
        a=a*a%q;
        b>>=1;
    }
    return num;
}

int fun(int a,int b,int k)//1-(a/b)^k=(b^k-a^k)/b^k
{
    int t=qmi(b,k,mod);
    int res=(t-qmi(a,k,mod)+mod)%mod;
    return res* qmi(t,mod-2,mod)%mod;
}

int dfs(int x,int y,int ax,int ay)
{
    int res=0;
    if(x==0) return 0;
    if(y==0) return 1;
    if(x==y)
    {
        return ax*qmi(ax+ay,mod-2,mod)%mod;//x 赢一局的概率
    }
    if(x>y)//往右分支 b连赢
    {
        int p_next=qmi(ay,y/x,mod)*qmi(qmi(ax+ay,x/y,mod),mod-2,mod)%mod;
        res=(res+p_next*dfs(x%y,y,ax,ay)%mod+fun(ay,ax+ay,x/y))%mod;
    }
    else if(x<y)//往左分支 a连赢
    {
        int p_next=qmi(ax,y/x,mod)*qmi(qmi(ax+ay,y/x,mod),mod-2,mod)%mod;
        res=(res+p_next*dfs(x,y%x,ax,ay)%mod)%mod;//a连赢过后继续分支
    }
    return res;
}

void solve()
{
    int x,y,a0,a1,b;
    cin>>x>>y>>a0>>a1>>b;
    cout<<dfs(x,y,a0,a1)<<endl;
}

signed main()
{
    std::ios::sync_with_stdio(false);
    cin.tie(0);
    int t;
    cin>>t;
    while(t--)
    {
        solve();
    }
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 0ms
memory: 3696kb

input:

3
1 1
2 2 6
1 3
2 3 6
3 4
7 3 15

output:

499122177
910398850
220911476

result:

ok 3 lines

Test #2:

score: 0
Accepted
time: 75ms
memory: 3704kb

input:

100000
1 1000000000
12980050 128257807 266126484
1 1000000000
400255084 123438563 768881284
1000000000 1000000000
24563487 72082135 450057094
1 1000000000
56952077 40876000 193815114
1000000000 1000000000
82048274 239365585 326520865
1000000000 1
309821265 346013425 963168258
1 1
104158269 199365020...

output:

947058399
376449942
612621163
138416357
592200562
45779380
870227707
169499045
86396463
415694940
46851356
951368934
426243016
864656779
750317399
922456360
486881524
824329239
198191519
189360084
966510181
512645443
695650039
703100783
550002158
438470182
246877045
39876086
667870434
405196653
5935...

result:

ok 100000 lines

Test #3:

score: -100
Wrong Answer
time: 389ms
memory: 3580kb

input:

100000
167959139 481199252
18199423 25950409 149762920
773386884 579721198
16629525 28339910 152155823
2087506 268792718
43528658 6471925 90197530
691952768 717268783
516613092 94328992 743662288
45277106 856168102
309821265 346013425 963168258
279198849 527268921
30167950 166388455 577970339
140515...

output:

993803839
173581251
52430979
309422484
333413667
445504847
826141857
627784664
784277294
993465173
718866945
85926935
252359707
8616165
201986843
244199883
422925565
518808471
455211277
954394830
389697172
846213018
485757634
981351795
57502050
591285477
534105703
145383370
967009774
317603542
68499...

result:

wrong answer 1st lines differ - expected: '623291477', found: '993803839'