QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#737529 | #9622. 有限小数 | rikka_lyly# | WA | 60ms | 3656kb | C++20 | 1.5kb | 2024-11-12 16:05:35 | 2024-11-12 16:05:35 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define ull unsigned long long
#define int ll
#define INF 0x3f3f3f3f3f3f3f3f
#define MAXD 1000000000
ll inv(ll x, ll p);
ll qpow(ll a, ll b, ll p = 1e18 + 7)//默认情况下认为到不了这么大
{
if(b < 0)
return inv(qpow(a, -b, p), p);
ll ans = 1;
while (b)
{
if(b & 1)
ans = ans * a % p;
a = a * a % p;
b >>= 1;
}
return ans;
}
ll inv(ll x, ll p)
{
return qpow(x, p - 2, p);
}
void solve()
{
ll a, b;
cin >> a >> b;
ll x = b, p1 = 0, q1 = 0;
while (x % 2 == 0)
{
x /= 2;
p1++;
}
while (x % 5 == 0)
{
x /= 5;
q1++;
}
if(x == 1)
{
cout << 0 << " " << 1 << '\n';
return;
}
pair<int, int> ans = {INF, INF};
for (int p2 = 0; ; p2++)
{
int tp = x * qpow(2, p2);
if(tp > MAXD)
break;
for (int q2 = 0; ; q2++)
{
ll d = x * qpow(2, p2) * qpow(5, q2);
if(d > MAXD)
break;
ll c = (x - a * qpow(2, p2 - p1, x) % x * qpow(5, q2 - q1, x) % x) % x;
ans = min(ans, {c, d});
}
}
cout << ans.first << " " << ans.second << '\n';
}
signed main()
{
ios::sync_with_stdio(false);
cin.tie(0), cout.tie(0);
int t;
cin >> t;
while (t--)
{
solve();
}
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 0ms
memory: 3588kb
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: 60ms
memory: 3656kb
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 6 1 7 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 3 3 347500 1 944 1 43600 1 76 1 430000 1 6336 1 291...
result:
wrong answer The result is not terminating.(Testcase 71)