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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
#743158#9622. 有限小数yzhx#WA 25ms3608kbC++111.3kb2024-11-13 18:25:182024-11-13 18:25:20

Judging History

你现在查看的是最新测评结果

  • [2024-11-13 18:25:20]
  • 评测
  • 测评结果:WA
  • 用时:25ms
  • 内存:3608kb
  • [2024-11-13 18:25:18]
  • 提交

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
*/

详细

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]