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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#736464 | #9622. 有限小数 | UESTC_NLNS | WA | 16ms | 3560kb | C++20 | 1.3kb | 2024-11-12 11:13:29 | 2024-11-12 11:13:34 |
Judging History
answer
#include <iostream>
#include <vector>
using namespace std;
using ll = long long;
vector<ll> V;
const int inf = 1e9;
namespace INV {
ll x, y;
void exgcd(int a, int b) {
if (b == 0) {
x = 1, y = 0;
return;
}
exgcd(b, a % b);
ll tx = x;
x = y;
y = tx - y * (a / b);
}
int inv(int x, int p) {
exgcd(x, p);
return (x % p + p) % p;
}
} // namespace INV
using INV::inv;
void solve() {
int a, b;
cin >> a >> b;
int T = 1;
while (b % 2 == 0) T *= 2, b /= 2;
while (b % 5 == 0) T *= 5, b /= 5;
int as1 = inf, as2 = inf;
int iT = inv(T, b);
for (const ll v : V) {
if (b * v > inf) continue;
int d = b * v;
int c = (b - a * v % b * iT % b) % b;
if (c < as1) as1 = c, as2 = d;
}
cout << as1 << " " << as2 << '\n';
}
int main() {
cin.tie(0), cout.tie(0), ios::sync_with_stdio(0);
int t;
cin >> t;
{
vector<int> v1;
vector<int> v2;
ll x = 1;
while (x < inf) v1.push_back(x), x *= 2;
x = 1;
while (x < inf) v2.push_back(x), x *= 5;
for (int x : v1)
for (int y : v2)
if (1ll * x * y <= inf) V.push_back(x * y);
}
while (t--) solve();
}
Details
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Test #1:
score: 100
Accepted
time: 0ms
memory: 3496kb
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: 16ms
memory: 3560kb
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 828125000 1 15 1 4375 1 231680000 23 960937500 1 36096000 5 326 1 63360 0 1 1 61000 0 1 1 4880 1 10750000 1 4625 1 11714560 1 331250 1 898437500 1 31 1 15 1 289600000 1 455000 1 115000000 1 1265625 0 1 1 7421875 0 1 1 415 1 235937500 1 765000000 1 566406250 1 2968750 1 4406250 3 1550 1 3 3 347...
result:
wrong answer The result is not terminating.(Testcase 4)