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QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#750922#9622. 有限小数sixx_oneeWA 25ms3648kbC++201.6kb2024-11-15 16:21:532024-11-15 16:22:00

Judging History

你现在查看的是最新测评结果

  • [2024-11-15 16:22:00]
  • 评测
  • 测评结果:WA
  • 用时:25ms
  • 内存:3648kb
  • [2024-11-15 16:21:53]
  • 提交

answer

#include <bits/stdc++.h>
#define int long long
using namespace std;

const int N = 1e5 + 10;

int num[N], cnt;

long long quik_power(int base, int power)
{
    long long result = 1;
    while (power > 0)
    {
        if (power & 1)
            result = result * base;
        base = base * base;
        power >>= 1;
    }
    return result;
}

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

void solve()
{
    int c = 0x3f3f3f3f3f3f3f3f;
    int a, b;
    cin >> a >> b;
    int p = b;
    int ansd = 0;
    while (p % 2 == 0)
        p /= 2;
    while (p% 5 == 0)
        p /= 5;
    if(p==1){
        cout << 0 << ' ' << 1 << endl;
        return;
    }
    for (int i = 1; i <= cnt; i++)
    {
        int d = num[i] * p;
        if (d > 1e9)
            break;
        int x,y,aq1;
        aq1 = a*num[i];
        exgcd(b/p,-p,x,y);
        x = -aq1*x;
        //y = aq1*y;
        x = (x%p+p)%p;
        if(c>x)c = x,ansd = d;
    }
    cout << c << ' ' << ansd << endl;
}

signed main()
{
    int tt = 1;
    cin >> tt;
    for (int i = 0; i <= 29; i++)
    {
        for (int j = 0; j <= 12; j++)
        {
            int cc = quik_power(2, i) * quik_power(5, j);
            if (cc <= 1e9)
            {
                num[++cnt] = cc;
            }
            else
                break;
        }
    }
    sort(num + 1, num + 1 + cnt);
    // cout << cnt << endl;
    while (tt--)
    {
        solve();
    }
}

Details

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Test #1:

score: 100
Accepted
time: 1ms
memory: 3648kb

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: 25ms
memory: 3644kb

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)