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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
#741321#9622. 有限小数PHarrWA 32ms3624kbC++20963b2024-11-13 14:05:572024-11-13 14:06:02

Judging History

你现在查看的是最新测评结果

  • [2024-11-13 14:06:02]
  • 评测
  • 测评结果:WA
  • 用时:32ms
  • 内存:3624kb
  • [2024-11-13 14:05:57]
  • 提交

answer

#include <bits/stdc++.h>

using namespace std;


using i64 = long long;

const i64 MAXN = 2e9;
const i64 inf = LLONG_MAX / 2;

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

i64 calc(i64 a, i64 b, i64 c) {
	i64 x, y;
	i64 d = exgcd(a, b, x, y);
	d = abs(d);
	if(c % d != 0) return inf;
	x *= c / d;
	i64 t = abs(b / d);
	return (x % t + t) % t;
}

void solve() {
	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";
		return;
	}

	i64 resc = inf, resd;
	for(i64 p5 = w; p5 <= MAXN; p5 *= 5)
		for(i64 d = p5, c; d <= MAXN; d *= 2) {
			c = calc(b, w * w, -a * d);
			if(c < resc) resc = c, resd = d;
		}
	cout << resc << " " << resd << "\n";
	return;
}

int main() {
	int T;
	cin >> T;

	while(T --)
		solve();

	return 0;
}

详细

Test #1:

score: 100
Accepted
time: 0ms
memory: 3624kb

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: 32ms
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 3
1 54272
1 6
1 7
1 231680000
23 3936
1 36096000
4 1591796875
1 63360
0 1
1 31232
0 1
1 4880
1 44032
1 757760
1 11714560
1 331250
1 2944
1 31
1 6
1 289600000
1 455000
1 58880
1 51840
0 1
1 304
0 1
1 415
1 19328000
1 765000000
1 4640
1 608
1 72192
3 775
1 3
3 347500
1 944
1 43600
1 76
1 1761280
1 6...

result:

wrong answer Integer 1591796875 violates the range [1, 10^9]