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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
#761949#9622. 有限小数abbcc_1WA 21ms3716kbC++201.2kb2024-11-19 11:50:212024-11-19 11:50:22

Judging History

你现在查看的是最新测评结果

  • [2024-11-19 11:50:22]
  • 评测
  • 测评结果:WA
  • 用时:21ms
  • 内存:3716kb
  • [2024-11-19 11:50:21]
  • 提交

answer

#include <bits/stdc++.h>

using namespace std;

using i64 = long long;

i64 extgcd(i64 a, i64 b, i64& x, i64& y) {
    i64 d = a;
    if (!b) {
        x = 1, y = 0;
    } else {
        d = extgcd(b, a % b, y, x);
        y -= x * (a / b);
    }
    return d;
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    int kase;
    cin >> kase;
    while (kase--) {
        i64 a, b;
        cin >> a >> b;
        i64 w = b;
        while (w % 2 == 0) {
            w /= 2;
        }
        while (w % 5 == 0) {
            w /= 5;
        }
        if (w == 1) {
            cout << 0 << ' ' << 1 << '\n';
            continue;
        }
        pair<i64, i64> res = {1e9, 1e9};
        for (i64 j = 1; j <= 1'000'000'000; j *= 2) {
            i64 cur = j;
            while (cur * w <= 1'000'000'000) {
                // cerr << "cur = " << cur << '\n';
                i64 x, y;
                extgcd(b / w, -w, x, y);
                x *= -a * cur;
                x = (x % w + w) % w;
                res = min(res, pair{x, cur * w});
                cur *= 5;
            }
        }
        cout << res.first << ' ' << res.second << '\n';
    }

    return 0;
}

詳細信息

Test #1:

score: 100
Accepted
time: 0ms
memory: 3668kb

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: 21ms
memory: 3716kb

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 3
1 7
1 231680000
23 3936
1 36096000
5 326
1 63360
0 1
1 31232
0 1
1 4880
1 344
1 118400
1 11714560
1 331250
1 2944
1 31
1 3
1 289600000
1 455000
1 58880
1 51840
0 1
1 4750
0 1
1 415
1 19328000
1 765000000
1 29000
1 608
1 72192
3 775
1 6
3 347500
1 944
1 43600
1 23750
1 430000
1 6336
1...

result:

wrong answer The result is not terminating.(Testcase 3)