QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#587467 | #9376. Game | yuannn | WA | 72ms | 3708kb | C++23 | 1.2kb | 2024-09-24 20:04:45 | 2024-09-24 20:04:45 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define endl '\n'
//只需要知道这个题目涉及:辗转相除(那么不用题解,也能把这个题目给补了)
//思维很简单,主要看的是,怎么去模拟实现 在m'n
const int mod=998244353;
int fpow(int x,int n){
int ans=1;
while(n){
if(n&1) ans=ans*x%mod;
x=x*x%mod;
n>>=1;
}
return ans;
}
int ans=0,now=1;
int p1,p2;
int gcd(int x,int y,int op){
if(x==0) return 0;
int e=(y+x-1)/x;
if(op==1) ans=(ans+now*fpow(p1,e)%mod)%mod,now=now*p1%mod;
else ans=(ans+now*p1%mod*(fpow(p2,e-1)-1)%mod*fpow(p2-1,mod-2)%mod*p2%mod+mod)%mod,now=now*p2%mod;
return gcd(y%x,x,op^1);
}
void solve(){
int x,y;cin>>x>>y;
int a0,a1,b;
cin>>a0>>a1>>b;
p1=a0*fpow(a0+a1,mod-2)%mod;
p2=a1*fpow(a0+a1,mod-2)%mod;
ans=0,now=1;
if(x==y){cout<<fpow(2,mod-2)<<endl;return;}
if(x<y) gcd(x,y,1);
else gcd(y,x,0);
cout<<ans<<endl;
}
signed main(){
ios::sync_with_stdio(false);
cin.tie(0), cout.tie(0);
int t = 1;
cin >> t;
while (t--) solve();
}
Details
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Test #1:
score: 100
Accepted
time: 1ms
memory: 3708kb
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: -100
Wrong Answer
time: 72ms
memory: 3628kb
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 499122177 138416357 499122177 857808336 499122177 499122177 985023825 499122177 273611525 951368934 499122177 499122177 499122177 203933533 499122177 824329239 499122177 499122177 499122177 499122177 499122177 178553963 499122177 414577756 246877045 39876086 499122177 405196653 4...
result:
wrong answer 3rd lines differ - expected: '612621163', found: '499122177'