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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 |
---|---|---|---|---|---|---|---|---|---|
#739464 | #9622. 有限小数 | startd | WA | 72ms | 3648kb | C++14 | 1.4kb | 2024-11-12 21:49:57 | 2024-11-12 21:50:08 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
#define int long long
int ttt;
int a,b;
int exgcd(int a,int b,int &x,int &y){
if(b==0){
x=1;
y=0;
return a;
}
return exgcd(b,a%b,y,x);
y-=a/b*x;
}
int updiv(int a,int b) {
return (a+b-1)/b;
}
int downdiv(int a,int b) {
return a/b;
}
signed main() {
cin>>ttt;
while(ttt--) {
cin>>a>>b;
int ans_c=1000000000,ans_d=1000000000;
int g=__gcd(a,b);
a/=g;
b/=g;
int x=b;
while(x%2==0) x/=2;
while(x%5==0) x/=5;
if(x==1) {
cout<<"0 1"<<endl;
continue;
}
for(int p2=1;x*p2<=1e9;p2*=2) {
for(int p5=1;x*p2*p5<=1e9;p5*=5) {
int d=x*p2*p5;
int c,k;
int g=exgcd(x,b/x,k,c);
if((a*p2*p5)%g==0) {
k*=(a*p2*p5)/g;
c*=(a*p2*p5)/g;
int dc=x/g,dk=(b/x)/g;
if(c>=0) {
int t=updiv(c,dc);
c-=dc*t;
k+=dk*t;
if(c==0) {
c-=dc;
k+=dk;
}
}
if(k<0) continue;
int t=min(downdiv(-c,dc),downdiv(k,dk));
c+=dc*t;
k-=dk*t;
if(c==0) {
c-=dc;
k+=dk;
}
int g_=__gcd(-c,d);
if(-c/g_<ans_c) {
ans_c=-c/g_;
ans_d=d/g_;
}
else if((-c/g_==ans_c)&&(d/g_<ans_d)) {
ans_c=-c/g_;
ans_d=d/g_;
}
}
}
}
cout<<ans_c<<' '<<ans_d<<endl;
}
return 0;
}
/*
4
1 2
2 3
3 7
19 79
*/
詳細信息
Test #1:
score: 100
Accepted
time: 0ms
memory: 3644kb
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: 72ms
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 3 1 54272 1 1 1 70 1 231680000 23 3936 1 36096000 5 326 1 63360 0 1 1 31232 0 1 1 4880 1 1 1 1 1 11714560 1 331250 1 2944 1 31 1 1 1 289600000 1 455000 1 58880 1 51840 0 1 1 1 0 1 1 415 1 19328000 1 765000000 1 1 1 608 1 72192 3 6200 1 1 3 347500 1 944 1 43600 1 1 1 430000 1 6336 1 29184 11 795000...
result:
wrong answer The result is not terminating.(Testcase 3)