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QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#770484#9622. 有限小数RongYu#WA 64ms3600kbC++17917b2024-11-21 22:03:462024-11-21 22:03:46

Judging History

你现在查看的是最新测评结果

  • [2024-11-21 22:03:46]
  • 评测
  • 测评结果:WA
  • 用时:64ms
  • 内存:3600kb
  • [2024-11-21 22:03:46]
  • 提交

answer

#include <bits/stdc++.h>

using namespace std;
#define endl '\n'
#define int long long

void solve() {
    int a, b; cin >> a >> b;
    const int up = 1e9;
    pair<int, int> ans = {up, up};
    for(int i = 1; i <= up; i *= 2) {
        for(int j = 1; i * j <= up; j *= 5) {
            int d = b * i * j;
            if(d > up) break;
            // c = kb - a * 2 ^ i * 5 ^ j
            // k >= (a * i * j + b - 1) / b
            int v = a * i * j;
            int k = (v + b - 1) / b;
            while(k % 2 == 0 || k % 5 == 0) k++;
            int c = k * b - v, g = gcd(c, d);
            c /= g, d /= g;
            ans = min(ans, {c, d});
        }
    }
    auto [c, d] = ans;
    cout << c << ' ' << d << endl;
}
signed main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int T = 1;
    cin >> T;
    while (T--) {
        solve();
    }
    return 0;
}

Details

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Test #1:

score: 100
Accepted
time: 0ms
memory: 3584kb

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: 64ms
memory: 3600kb

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 12
1 54272
1 15
1 7
1 231680000
23 3936
1 36096000
5 326
1 63360
0 1
1 31232
1 16
1 4880
1 44032
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 103750
1 19328000
1 765000000
1 4640
1 608
1 72192
3 775
1 12
3 347500
1 944
1 43600
1 1520
1 430000
1 6...

result:

wrong answer Jury found better answer than participant's 0 < 1 (Testcase 12)