QOJ.ac
QOJ
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 |
---|---|---|---|---|---|---|---|---|---|
#738176 | #9622. 有限小数 | ucup-team059# | WA | 1ms | 3568kb | C++20 | 1.4kb | 2024-11-12 18:05:53 | 2024-11-12 18:05:54 |
Judging History
answer
#include <bits/stdc++.h>
#define ll long long
ll exgcd(ll a, ll b, ll &x, ll &y){
if (b == 0){
x = 1, y = 0;
return a;
}
int d = exgcd(b, a % b, y, x);
y -= a / b * x;
return d;
}
void solve(){
int a, b;
std::cin >> a >> b;
std::vector<ll> num;
if (b == 5 || b == 2){
std::cout << "0 1\n";
return;
}
constexpr int MAX = 1e6;
for (ll i = 1; i <= MAX; i *= 2){
for (ll j = 1; i * j <= MAX; j *= 5){
for (ll k = 1; i * k * j <= MAX; k *= b){
num.push_back(i * k * j);
}
}
}
std::sort(num.begin(), num.end());
std::pair<ll, ll> ans = {1e18, 1e18};
for (auto d : num){
// std::cout << d << '\n';
ll num1 = a * d;
if (num1 % b == 0){
ll by = b;
ll t = d;
while (t % b == 0){
by *= b;
t /= b;
}
ll add = by;
ll x, y;
if (num1 % std::gcd(by, y)){
continue;
}
ll d = exgcd(by, b, x, y);
y = -y;
while (x < 0 || y < 0){
x += b / d;
y += by / d;
}
while (x >= b / d && y >= by / d){
x -= b / d, y -= by / d;
}
by = x * by;
by -= num1;
by /= b;
if (ans > std::make_pair(by, d) && by >= 0){
ans = std::make_pair(by, d);
}
}
}
std::cout << ans.first << ' ' << ans.second << '\n';
}
int main(){
std::ios::sync_with_stdio(false);
std::cin.tie(nullptr);
int t;
std::cin >> t;
while (t--){
solve();
}
return 0;
}
详细
Test #1:
score: 0
Wrong Answer
time: 1ms
memory: 3568kb
input:
4 1 2 2 3 3 7 19 79
output:
0 1 1 3 1 7 3 79
result:
wrong answer The result is not terminating.(Testcase 3)