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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 |
---|---|---|---|---|---|---|---|---|---|
#743158 | #9622. 有限小数 | yzhx# | WA | 25ms | 3608kb | C++11 | 1.3kb | 2024-11-13 18:25:18 | 2024-11-13 18:25:20 |
Judging History
answer
#include <iostream>
#include <vector>
using namespace std;
using ll = long long;
#define int ll
vector<ll> k;
inline int exgcd(int a, int b, int &x, int &y, int t) {
if (b == 0) {
x = t, y = 0;
return a;
}
int d = exgcd(b, a % b, x, y, t);
int z = x;
x = y, y = z - y * (a / b);
return d;
}
void slove() {
ll up = 1e9;
ll a, b;
cin >> a >> b;
int bb = b;
while (bb % 2 == 0) bb /= 2;
while (bb % 5 == 0) bb /= 5;
int k1 = b / bb;
if (bb == 1) {
cout << "0 1\n";
return;
}
int C = 1e18, D = 0;
for (int i = 0; i < k.size(); i++) {
int k2 = k[i];
if (bb * k2 > 1e9) continue;
int t = (-(a * k2) % bb + bb) % bb;
int x, y;
int gcd = exgcd(k1, bb, x, y, t);
int lcm = bb / gcd;
int c = x % lcm;
if (c < C) {
C = c, D = bb * k2;
}
}
cout << C << ' ' << D << endl;
}
signed main() {
ll up = 1e9;
for (ll i = 1; i <= (ll)1e9; i *= 2LL) {
ll tmp = i;
while (tmp <= up) {
k.push_back(tmp);
tmp *= 5LL;
}
}
// cout << k.size() << endl;
int cnt = 1;
cin >> cnt;
while (cnt--) {
slove();
}
return 0;
}
/*
4
1 2
2 3
3 7
19 79
*/
詳細信息
Test #1:
score: 100
Accepted
time: 0ms
memory: 3608kb
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: 25ms
memory: 3564kb
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 -2 15 1 7 1 231680000 23 960937500 1 36096000 5 326 1 63360 0 1 1 61000 0 1 1 4880 -42 10750 -36 18500 1 11714560 1 331250 1 898437500 1 31 -2 15 1 289600000 1 455000 1 115000000 1 1265625 0 1 -18 1484375 0 1 1 415 1 235937500 1 765000000 -28 181250 1 2968750 1 4406250 3 775 -2 3 3 3...
result:
wrong answer Integer -2 violates the range [0, 10^9]