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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
#814585#9622. 有限小数kiana810WA 110ms3944kbC++141.5kb2024-12-14 18:38:502024-12-14 18:38:57

Judging History

你现在查看的是最新测评结果

  • [2024-12-14 18:38:57]
  • 评测
  • 测评结果:WA
  • 用时:110ms
  • 内存:3944kb
  • [2024-12-14 18:38:50]
  • 提交

answer

#include <bits/stdc++.h>

using namespace std;
typedef long long ll;

int T;
ll a, b, c, d;
int cp2, cp5;
ll ip2, ip5;

void exgcd(ll a, ll b, ll &x, ll &y) {
    if (!b) {
        x = 1ll;
        y = 0ll;
        return;
    }
    exgcd(b, a%b, x, y);
    ll t = x;
    x = y;
    y = t - a / b * y;
}

ll inv(ll a, ll p) {
    ll x, y;
    exgcd(a, p, x, y);
    x = (x % p + p) % p;
    return x;
}

int main() {
    scanf("%d", &T);
    while (T--) {
        scanf("%lld%lld", &a, &b);
        cp2 = cp5 = 0;
        for (; b % 2 == 0; b /= 2, cp2++);
        for (; b % 5 == 0; b /= 5, cp5++);
        if (b == 1) {
            puts("0 1");
            continue;
        }
        ip2 = ip5 = 1ll;
        for (int i = 0; i < cp2; i++, ip2 *= inv(2, b));
        for (int i = 0; i < cp5; i++, ip5 *= inv(5, b));
        c = 1e9 + 1ll;
        for (int i = 0; i < 35; i++) {
            for (int j = 0; j < 15; j++) {
                ll tmp = (-a % b + b) % b, tmp2 = b;
                for (int k = 0; (k < i) && (tmp2 <= 1e9); k++, tmp2 *= 2);
                for (int k = 0; (k < j) && (tmp2 <= 1e9); k++, tmp2 *= 5);
                if (tmp2 > 1e9) continue;
                for (int k = 0; k < i; k++, tmp *= 2, tmp %= b);
                for (int k = 0; k < j; k++, tmp *= 5, tmp %= b);
                if (tmp < c) {
                    c = tmp;
                    d = tmp2;
                }
            }
        }
        printf("%lld %lld\n", c, d);
    }
    return 0;
}

详细

Test #1:

score: 100
Accepted
time: 0ms
memory: 3944kb

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: 110ms
memory: 3844kb

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
1 3
1 21875
1 231680000
23 960937500
1 36096000
5 326
1 63360
0 1
1 61000
0 1
1 4880
1 5375
1 9250
1 11714560
1 331250
1 898437500
1 31
1 3
1 289600000
1 455000
1 115000000
1 1265625
0 1
1 14843750
0 1
1 415
1 235937500
1 765000000
1 90625
1 2968750
1 4406250
3 6200
1 15
3 347500
1 9...

result:

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