QOJ.ac
QOJ
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 |
---|---|---|---|---|---|---|---|---|---|
#582987 | #9376. Game | Ail_ijyq | WA | 389ms | 3704kb | C++14 | 1.3kb | 2024-09-22 17:55:52 | 2024-09-22 17:55:56 |
Judging History
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();
}
}
详细
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'