QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#741397 | #9622. 有限小数 | ZLYF | WA | 43ms | 3648kb | C++20 | 1022b | 2024-11-13 14:16:40 | 2024-11-13 14:16:41 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
#define int long long
#define pii pair<int,int>
const int N=1e3+5,inf=1e9;
int q[N],tot;
map<int,int> mp;
void dfs(int x){
if(x>inf)
return ;
if(!mp[x]){
mp[x]=1;
q[++tot]=x;
}
dfs(x*2);
dfs(x*5);
}
void exgcd(int a,int b,int &x,int &y){
if(b==0){
x=1;
y=0;
return ;
}
exgcd(b,a%b,y,x);
y-=a/b*x;
}
void solve(){
int a,b;
cin>>a>>b;
int B=b;
while(B%2==0)
B/=2;
while(B%5==0)
B/=5;
if(B==1){
cout<<"0 1\n";
return ;
}
int ans1=inf,ans2=inf,w=b/B;
for(int i=1;i<=tot&&q[i]*B<=inf;i++){
int d=q[i]*B;
//xc=y(modB) -> xc+Bk=y
int y=(-(q[i]*a)%B+B)%B,x=w,X,Y;
exgcd(x,B,X,Y);
X=(X%B+B)%B;
int c=X*y%B;
if(ans1>c){
ans1=c;
ans2=d;
}
}
cout<<ans1<<" "<<ans2<<"\n";
}
signed main(){
ios::sync_with_stdio(false);
cin.tie();cout.tie();
dfs(2);
dfs(5);
sort(q+1,q+1+tot);
int T;cin>>T;
while(T--)
solve();
return 0;
}
/*
4
1 2
2 3
3 7
19 79
*/
Details
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Test #1:
score: 100
Accepted
time: 9ms
memory: 3644kb
input:
4 1 2 2 3 3 7 19 79
output:
0 1 1 12 1 14 3 316
result:
ok 4 case(s)
Test #2:
score: -100
Wrong Answer
time: 43ms
memory: 3648kb
input:
10000 11 12 28 53 17 60 2 35 17 181 80 123 68 141 79 163 71 99 13 64 33 61 15 32 16 61 11 86 33 74 128 143 40 53 7 23 30 31 5 6 86 181 73 91 13 23 71 81 1 2 7 38 117 160 33 83 129 151 88 153 25 58 16 19 19 141 95 124 43 96 71 139 11 59 106 109 93 152 34 43 17 99 1 57 20 159 16 25 5 73 159 170 172 17...
output:
1 12 1 54272 1 6 1 56 1 231680000 23 3936 1 36096000 5 326 1 63360 0 1 1 31232 0 1 1 4880 1 10750 1 18500 1 11714560 1 331250 1 2944 1 992 1 6 1 289600000 1 455000 1 58880 1 51840 0 1 1 304 0 1 1 415 1 19328000 1 765000000 1 4640 1 608 1 72192 3 775 1 12 3 347500 1 944 1 43600 1 76 1 430000 1 6336 1...
result:
wrong answer Jury found better answer than participant's 1 < 2 (Testcase 72)