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QOJ
| 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 |
|---|---|---|---|---|---|---|---|---|---|
| #226767 | #5152. Circular Caramel Cookie | Fyind# | WA | 0ms | 3908kb | C++23 | 1.7kb | 2023-10-26 15:49:07 | 2023-10-26 15:49:08 |
Judging History
answer
#include <bits/stdc++.h>
typedef long long ll;
using namespace std;
bool check(ll x, ll s, ll dx, ll dy) {
// cout << dx << ' ' << dy << endl;
ll cnt = 0;
for (ll i = 1; (2 * i - dx) * (2 * i - dx) <= x; ++i) {
ll l = 0, r = sqrt(x);
ll res = x - (2 * i - dx) * (2 * i - dx);
while (l <= r) {
ll mid = (l + r) >> 1;
if ((2 * mid + dy) * (2 * mid + dy) <= res)
l = mid + 1;
else
r = mid - 1;
}
// cout << l << ',' << i << ',' << x << endl;
// cout << res << endl;
cnt += ((l - 1) * 2 + dy) * (1 + !(dx && i == 1));//, cout << cnt << '!';
}
// cout << x << ':' << cnt << ',' << s << endl;
return cnt < s;
}
int main() {
ll s;
cin >> s;
ll ans;
{
ll ss = (s + 3) / 4 * 4;
// cout << s << endl;
ll l = 0, r = 20 * ss;
while (l <= r) {
ll mid = (l + r) / 2;
if(check(mid, ss, 0, 0))
l = mid + 1;
else
r = mid - 1;
}
ans = l;
}
// {
// ll l = 0, r = 20 * s;
// while (l <= r) {
// ll mid = (l + r) / 2;
// if(check(mid, s, 1, 1))
// l = mid + 1;
// else
// r = mid - 1;
// }
// // cout << l << endl;
// ans = min(ans, l);
// }
// {
// ll l = 0, r = 20 * s;
// while (l <= r) {
// ll mid = (l + r) / 2;
// if(check(mid, s, 1, 0))
// l = mid + 1;
// else
// r = mid - 1;
// }
// // cout << l << endl;
// ans = min(ans, l);
// }
// cout << ans << endl;
ans = (ans + 3) / 4;
long double l = 0, r = ans;
while (r - l > 1e-12) {
long double mid = (l + r) / 2;
if (mid * mid <= ans)
l = mid;
else
r = mid;
}
cout << fixed << setprecision(12) << l << '\n';
// cout << sqrt(ans) << endl;
}
詳細信息
Test #1:
score: 100
Accepted
time: 0ms
memory: 3812kb
input:
11
output:
2.236067977499
result:
ok found '2.2360680', expected '2.2360680', error '0.0000000'
Test #2:
score: 0
Accepted
time: 0ms
memory: 3904kb
input:
59
output:
5.000000000000
result:
ok found '5.0000000', expected '5.0000000', error '0.0000000'
Test #3:
score: 0
Accepted
time: 0ms
memory: 3908kb
input:
1
output:
1.414213562372
result:
ok found '1.4142136', expected '1.4142136', error '0.0000000'
Test #4:
score: 0
Accepted
time: 0ms
memory: 3880kb
input:
2
output:
1.414213562372
result:
ok found '1.4142136', expected '1.4142136', error '0.0000000'
Test #5:
score: 0
Accepted
time: 0ms
memory: 3848kb
input:
3
output:
1.414213562372
result:
ok found '1.4142136', expected '1.4142136', error '0.0000000'
Test #6:
score: -100
Wrong Answer
time: 0ms
memory: 3848kb
input:
4
output:
1.414213562372
result:
wrong answer 1st numbers differ - expected: '2.2360680', found: '1.4142136', error = '0.3675445'