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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
#746242#9622. 有限小数wxy2005WA 26ms3836kbC++231.0kb2024-11-14 13:58:162024-11-14 13:58:16

Judging History

你现在查看的是最新测评结果

  • [2024-11-14 13:58:16]
  • 评测
  • 测评结果:WA
  • 用时:26ms
  • 内存:3836kb
  • [2024-11-14 13:58:16]
  • 提交

answer

#include <bits/stdc++.h>
using namespace std;
const int N = 2e5 + 10, lim = 1e9;
int pw2[N], pw5[N], a, b, T, w;
long long c, d;
long long gcd(long long a, long long b){
	return b ? gcd(b, a % b) : a;
}
void exgcd(long long a, long long b, long long &x, long long &y){
	if(!b){
		x = 1, y = 0;
		return;
	}
	exgcd(b, a % b, y, x); y -= (a / b) * x;
}
long long solve(long long a, long long b, long long c){
	long long x, y;
	exgcd(a, b, x, y);
	c %= a;
	b = (b * c % a + a) % a;
	if(b > 0) return a - b;
	return b;
}
int main()
{
	scanf("%d", &T);
	while(T--){
		scanf("%d%d", &a, &b);
		int x = 1, y = 1;
		while(b % 2 == 0) y *= 2, b /= 2;
		while(b % 5 == 0) y *= 5, b /= 5;
		c = 1e18, d = 0;
		if(b == 1){
			puts("0 1");
			continue;
		}
		for(long long i = b; i <= lim; i *= 2){
			for(long long j = i; j <= lim; j *= 5){
				x = j / b;
				long long tmp = solve(b, y, x * a);
				if(tmp < c || (tmp == c && d > j)) c = tmp, d = j;
			}
		}
		printf("%lld %lld\n", c, d);
	}
	return 0;
}

详细

Test #1:

score: 100
Accepted
time: 0ms
memory: 3752kb

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: 26ms
memory: 3836kb

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:

0 585937500
1 54272
0 384000000
1 14
1 231680000
23 3936
1 36096000
5 326
1 63360
0 1
1 31232
0 1
1 4880
1 11008
1 4625
1 11714560
1 331250
1 2944
1 31
1 6
1 289600000
1 455000
1 58880
1 51840
0 1
1 76
0 1
1 415
1 19328000
1 765000000
1 1160
1 608
1 72192
0 992000000
0 187500000
3 347500
1 944
1 436...

result:

wrong answer The result is not terminating.(Testcase 1)