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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#758891 | #9622. 有限小数 | woodie_0064# | WA | 11ms | 3528kb | C++20 | 1.0kb | 2024-11-17 20:16:47 | 2024-11-17 20:16:47 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
const int D = 1e9;
int exgcd(int a, int b, int &x, int &y) {
if(b == 0) {
x = 1;
y = 0;
return a;
}
int d = exgcd(b, a % b, x, y);
int t = x;
x = y;
y = t - a / b * y;
return d;
}
int inv(int a, int p) {
int x, y;
exgcd(a, p, x, y);
return (x % p + p) % p;
}
void work(){
int a, b;
cin >> a >> b;
int x = 0, y = 0;
int d = 1;
while(b % 2 == 0) {
x++;
b /= 2;
d *= 2;
}
while(b % 5 == 0) {
y++;
b /= 5;
d *= 5;
}
a = 1ll * a * inv(d, b) % b;
int ansc = b, ansd = 1;
for(int i = 0, x = 1; x <= D; i++, x *= 2) {
for(int j = 0, y = 1; y <= D / x; j++, y *= 5) {
int t = 1ll * a * x % b * y % b;
if(t) {
t = b - t;
}
if(t < ansc) {
ansc = t;
ansd = b * x * y;
}
}
}
cout << ansc << ' ' << ansd << '\n';
}
int main(){
// freopen("test.txt", "r", stdin);
ios::sync_with_stdio(false);
cin.tie(0);
int T;
cin >> T;
while(T--){
work();
}
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 1ms
memory: 3528kb
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: 11ms
memory: 3528kb
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 15 1 7 1 231680000 23 -70948394 1 -2091842296 3 2086400000 1 63360 0 1 1 61000 0 1 1 -559229644 1 10750 1 18500 1 1117187500 1 331250 1 -1654433138 1 31 1 15 1 289600000 1 455000 1 788880816 1 1265625 0 1 1 1484375 0 1 1 415 1 235937500 1 765000000 1 181250 1 2968750 1 4406250 3 77...
result:
wrong answer Integer -70948394 violates the range [1, 10^9]