QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#725183 | #8022. Walker | nnk | WA | 1ms | 3864kb | C++20 | 1.5kb | 2024-11-08 16:35:32 | 2024-11-08 16:35:32 |
Judging History
answer
#include<bits/stdc++.h>
#define int long long
#define N 500005
using namespace std;
void solve()
{
double p1, v1, p2, v2, ans, n;
cin >> n >> p1 >> v1 >> p2 >> v2;
if (p1 > p2) {
swap(p1, p2);
swap(v1, v2);
}
//一个人走完全程
ans = (min(p1, n - p1) + n) / v1;
ans = min(ans, (min(p2, n - p2) + n) / v2);
//相反方向走
ans = min(ans, (n + p1 + (n - p2)) / (v1 + v2));
double tt = min(max((p2 + p1) / v1, (n - p2) / v2), max((n - p1 + n - p2) / v2, p1 / v1));
ans = min(ans, tt);
//相对方向走
double t1 = (p2 - p1) / (v1 + v2), x = v1 * t1 + p1, x2;
ans = min({ ans, max(x / v1, (n - x) / v2) + t1, max((n - x) / v1, x / v2) + t1 });
//相同方向走
x = (2 * n * v1 + p1 * v2 - p2 * v1) / (v1 + 2 * v2);
if (x >= p1 && x <= p2)
ans = min(ans, (2 * x - p1) / v1);
else ans = min(ans, max((p2 + p2 - p1) / v1, (n - p2) / v2));
x2 = (n * v1 + p2 * v1 - p1 * v2) / (2 * v1 + v2);
if (x2 >= p1 && x2 <= p2)
ans = min(ans, (n + p2 - 2 * x2) / v2);
else ans = min(ans, max((p2 - p1 + n - p1) / v2, p1 / v1));
cout<<setiosflags(ios::fixed)<<setprecision(10) << ans << endl;
}
signed main() {
ios::sync_with_stdio(false), cin.tie(nullptr);
int T = 1;
cin >> T;
while (T--) {
solve();
}
return 0;
}
/*
10
3 1
da/ma/ca/k
da/ma/ca/m
a/b/cc
da/ma/h/c
3 1
da/ma/ca/k
da/ma/ca/m
a/b/cc
da/ma/c
*/
Details
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Test #1:
score: 100
Accepted
time: 1ms
memory: 3804kb
input:
2 10000.0 1.0 0.001 9999.0 0.001 4306.063 4079.874 0.607 1033.423 0.847
output:
5001000.0000000000 3827.8370013755
result:
ok 2 numbers
Test #2:
score: 0
Accepted
time: 0ms
memory: 3804kb
input:
1 10.0 1.0 10.0 9.0 0.1
output:
1.1000000000
result:
ok found '1.1000000', expected '1.1000000', error '0.0000000'
Test #3:
score: 0
Accepted
time: 0ms
memory: 3824kb
input:
1 10.0 8.0 10.0 9.0 0.1
output:
1.2000000000
result:
ok found '1.2000000', expected '1.2000000', error '0.0000000'
Test #4:
score: 0
Accepted
time: 0ms
memory: 3824kb
input:
1 10.0 8.0 0.1 9.0 10
output:
1.1000000000
result:
ok found '1.1000000', expected '1.1000000', error '0.0000000'
Test #5:
score: 0
Accepted
time: 0ms
memory: 3864kb
input:
1 10.0 2.0 0.1 3.0 10
output:
1.3000000000
result:
ok found '1.3000000', expected '1.3000000', error '0.0000000'
Test #6:
score: 0
Accepted
time: 0ms
memory: 3808kb
input:
1 10.0 9.0 0.1 8.0 10.0
output:
1.2000000000
result:
ok found '1.2000000', expected '1.2000000', error '0.0000000'
Test #7:
score: 0
Accepted
time: 0ms
memory: 3860kb
input:
1 10.0 4.0 0.1 6.0 0.1
output:
60.0000000000
result:
ok found '60.0000000', expected '60.0000000', error '0.0000000'
Test #8:
score: -100
Wrong Answer
time: 0ms
memory: 3832kb
input:
1 10.0 4.5 0.1 6.0 0.1
output:
60.0000000000
result:
wrong answer 1st numbers differ - expected: '57.5000000', found: '60.0000000', error = '0.0434783'