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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 |
---|---|---|---|---|---|---|---|---|---|
#741827 | #9622. 有限小数 | keke | WA | 48ms | 3692kb | C++20 | 1.1kb | 2024-11-13 15:18:41 | 2024-11-13 15:18:42 |
Judging History
answer
#include <iostream>
#include <cstdio>
#include <cstring>
template <typename T> inline void read(T &s)
{
s=0;int f=1;char ch=getchar();
for(;ch<'0'||ch>'9';ch=getchar())if(ch=='-')f=-f;
for(;ch>='0'&&ch<='9';ch=getchar())s=s*10+ch-'0';
s*=f;
}
#define ll long long
ll Gcd(ll a,ll b){return !b?a:Gcd(b,a%b);}
void exgcd(ll a,ll b,ll &x,ll &y)
{
if(!b)return x=1,y=0,void();
exgcd(b,a%b,y,x);
y-=a/b*x;
}
ll solve(ll a,ll b,ll c)
{
if(!c)return 0;
ll x0=0,y0=0;
exgcd(a,b,x0,y0);
x0=(x0%b+b)%b;
x0=x0*c%b;
return x0;
}
const ll Lim=1e9;
void work()
{
ll a,b;read(a);read(b);
ll k1=1;
while(!(b%2))k1*=2,b/=2;
while(!(b%5))k1*=5,b/=5;
ll ansc=b-a,ansd=b;
for(ll tmp=1;tmp*b<=Lim;tmp*=2)
for(ll k2=tmp;k2*b<=Lim;k2*=5)
{
//printf("k2=%lld\n",k2);
ll g=Gcd(k1,k2);
ll c=solve(k1/g,b,(b-k2/g*a%b)%b);
//if(k2==2)printf("!%lld\n",c);
if(ansc>c)ansc=c,ansd=k2*b;
}
printf("%lld %lld\n",ansc,ansd);
}
int main()
{
int T;read(T);
while(T--)work();
return 0;
}
详细
Test #1:
score: 100
Accepted
time: 0ms
memory: 3692kb
input:
4 1 2 2 3 3 7 19 79
output:
0 1 1 3 1 4375 3 316
result:
ok 4 case(s)
Test #2:
score: -100
Wrong Answer
time: 48ms
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:
-8 3 1 828125000 -14 3 1 7 1 231680000 23 960937500 1 36096000 5 326 1 63360 -12 1 1 61000 -14 1 1 4880 1 10750 1 18500 1 11714560 1 331250 1 898437500 1 31 -2 3 1 289600000 1 455000 1 115000000 1 1265625 0 1 1 1484375 -116 1 1 415 1 235937500 1 765000000 1 181250 1 2968750 1 4406250 -64 31 -40 3 3 ...
result:
wrong answer Integer -8 violates the range [0, 10^9]