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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
#741173#9622. 有限小数ZLYFWA 40ms3632kbC++201.1kb2024-11-13 13:40:012024-11-13 13:40:02

Judging History

你现在查看的是最新测评结果

  • [2024-11-13 13:40:02]
  • 评测
  • 测评结果:WA
  • 用时:40ms
  • 内存:3632kb
  • [2024-11-13 13:40:01]
  • 提交

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=b-a,ans2=b,w=b/B;
	for(int i=1;i<=tot&&q[i]*B<=inf;i++){
		int d=q[i]*B;
		//xc=y(modB)
		int y=-q[i]*a,x=w,xinv,k;
		y=y%B+B;
		//x*xinv=1(modB)->x*xinv+B*k=1
		exgcd(x,B,xinv,k);
		xinv=(xinv+B)%B;
		int c=xinv*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 

0 1
1 3
1 14
3 316
*/

詳細信息

Test #1:

score: 100
Accepted
time: 9ms
memory: 3632kb

input:

4
1 2
2 3
3 7
19 79

output:

0 1
1 3
1 14
3 316

result:

ok 4 case(s)

Test #2:

score: -100
Wrong Answer
time: 40ms
memory: 3572kb

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 31
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 6731)