QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#749066 | #9622. 有限小数 | kindow | WA | 42ms | 3796kb | C++20 | 1.6kb | 2024-11-14 22:31:49 | 2024-11-14 22:31:55 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
void solve(){
ll a, b;
cin >> a >> b;
vector<__int128_t> mul2(30);
vector<__int128_t> mul5(30);
vector<__int128_t> mul10(30);
mul2[0] = mul5[0] = mul10[0] = 1;
ll m = max(ceil(log(b) / log(5)), ceil(log2(b)));
for(int i = 1; i <= m; ++i){
mul2[i] = mul2[i - 1] * __int128_t(2);
mul5[i] = mul5[i - 1] * __int128_t(5);
mul10[i] = mul10[i - 1] * __int128_t(10);
}
ll miny = 0x7fffffffff;
ll totd;
for(ll i = 0; i <= m; ++i){
__int128_t r = 1;
ll curb = b;
ll num2 = 0;
ll num5 = 0;
while(curb % 2 == 0){
curb /= 2ll;
num2++;
}
while(curb % 5 == 0){
curb /= 5ll;
num5++;
}
for(ll j = 0; j < min(i, num2); ++j){
r *= 2ll;
}
for(ll j = 0; j < min(i, num5); ++j){
r *= 5ll;
}
for(ll p = 0; p <= i; ++p){
for(ll q = 0; q <= i; ++q){
if((mul10[i] / r) % mul2[p] || (mul10[i] / r) % mul5[q]){
continue;
}
__int128_t cur = mul10[i] / r * a / mul2[p] / mul5[q];
__int128_t now = b / r;
__int128_t bn = cur / now + 1;
__int128_t c = (bn * now - cur) % now;
__int128_t t = mul10[i] / mul2[p] / mul5[q];
__int128_t curd = t * b / r;
if(c < miny){
miny = c;
totd = curd;
}
}
}
}
cout << miny << ' ' << totd << '\n';
}
int main(){
ios::sync_with_stdio(false);
cin.tie(nullptr);
cout.tie(nullptr);
int t;
cin >> t;
while(t--){
solve();
}
}
Details
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Test #1:
score: 100
Accepted
time: 1ms
memory: 3736kb
input:
4 1 2 2 3 3 7 19 79
output:
0 10 1 3 1 14 3 316
result:
ok 4 case(s)
Test #2:
score: -100
Wrong Answer
time: 42ms
memory: 3796kb
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 12 3 165625 1 60 1 350 7 90500 23 246000 5 282 5 326 1 63360 0 1000000 1 61000 0 100000 1 4880 1 10750 1 18500 3 28600000 1 331250 1 460000 1 31 1 6 7 113125 1 455000 3 92000 1 1265625 0 10 1 304 0 100000 1 415 1 235937500 1 765000000 1 4640 1 608 1 4406250 3 3100000 1 480 3 347500 1 944 1 43600 1...
result:
wrong answer Jury found better answer than participant's 1 < 3 (Testcase 2)