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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 |
---|---|---|---|---|---|---|---|---|---|
#209965 | #7110. Kuririn MIRACLE | PetroTarnavskyi | RE | 3ms | 4300kb | C++17 | 1.6kb | 2023-10-10 20:30:54 | 2023-10-10 20:30:54 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
#define FOR(i, a, b) for(int i = (a); i < (b); i++)
#define RFOR(i, a, b) for(int i = (a) - 1; i >= (b); i--)
#define SZ(a) int(a.size())
#define ALL(a) a.begin(), a.end()
#define PB push_back
#define MP make_pair
#define F first
#define S second
typedef long long LL;
typedef vector<int> VI;
typedef pair<int, int> PII;
typedef double db;
const int M = 40000;
const db PI = acos(-1.0);
const db EPS = 1e-9;
db v, r, d;
db f(db phi)
{
db si = sin(phi);
return -v / (2 * r) * (sqrt(3 + si * si) - si);
}
void solve()
{
cin >> v >> r >> d;
db ans = d / v;
db phi = PI;
const db dt = ans / M;
FOR(i, 1, M + 1)
{
db t = i * dt;
db k1 = f(phi), k2 = f(phi + dt / 2 * k1), k3 = f(phi + dt / 2 * k2),
k4 = f(phi + dt * k3);
phi += dt / 6 * (k1 + 2 * k2 + 2 * k3 + k4);
db si = sin(phi);
db a = d - 2 * r - v * t;
if (a < 0)
continue;
if (phi < PI / 2 && phi > EPS)
{
db l = sqrt(4 * r * r + a * a - 4 * r * a * cos(phi));
db siBeta = 2 * r * si / l;
assert(0 <= siBeta && siBeta < 1 - EPS);
db beta = asin(min(1.0, siBeta));
if (phi + beta <= PI / 2 && 2 * cos(phi + beta) >= cos(phi))
{
ans = min(ans, t + l / (2 * v));
break;
}
}
else if (phi < EPS)
{
ans = t + a / (2 * v);
break;
}
}
cout << ans << "\n";
//cerr << ans - 8.310579933902352 << "\n";
}
int main()
{
ios::sync_with_stdio(0);
cin.tie(0);
cout << fixed << setprecision(15);
int t;
cin >> t;
while (t--)
solve();
return 0;
}
详细
Test #1:
score: 100
Accepted
time: 3ms
memory: 4300kb
input:
1 2.00 3 30.0
output:
8.310579933906595
result:
ok found '8.3105799', expected '8.3105799', error '0.0000000'
Test #2:
score: -100
Runtime Error
input:
100 8.66 6.05 71.59 8.44 8.67 82.55 4.23 9.68 24.74 6.63 9.95 7.45 1.2 7.27 97.55 2.08 2.94 31.61 8.48 5.56 20.16 7.35 5.55 52.48 1.35 8.15 51.23 3.88 9.02 72.37 7.03 1.97 57.03 1.78 4.44 93.44 5.5 6.11 52.94 1.09 9.64 69.01 1.01 3.54 16.78 1.63 4.55 44.06 5.82 5.51 5.92 5.62 2.93 76.01 4.75 4.43 73...