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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 |
|---|---|---|---|---|---|---|---|---|---|
| #744181 | #8242. V-Diagram | zzisjtu# | WA | 99ms | 4044kb | C++23 | 716b | 2024-11-13 21:04:19 | 2024-11-13 21:04:19 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
#define int long long
#define endl '\n'
#define LF(x) fixed<<setprecision(x)
void solve() {
int n;
long double ans=0;
cin>>n;
vector<long double>a(n+1);
for(int i=1;i<=n;i++)
cin>>a[i],ans+=a[i];
double cnt=ans/n;
int x=n;
for(int i=1;i<=n;i++)
{
if(x>=3&&a[i]<=cnt)
{
x--;
cnt=(ans-2*a[i])/x;
}
else break;
}
for(int i=n;i>=1;i--)
{
if(x>=3&&a[i]<=cnt)
{
x--;
cnt=(ans-2*a[i])/x;
}
else break;
}
cout<<LF(10)<<cnt<<endl;
}
#undef int
int main() {
ios::sync_with_stdio(false);
cin.tie(0);
int t = 1;
cin >> t;
while(t--) {
solve();
}
return 0;
}
详细
Test #1:
score: 100
Accepted
time: 0ms
memory: 4044kb
input:
2 4 8 2 7 10 6 9 6 5 3 4 8
output:
6.7500000000 5.8333333333
result:
ok 2 numbers
Test #2:
score: -100
Wrong Answer
time: 99ms
memory: 3764kb
input:
100000 3 948511478 739365502 813471668 3 881046825 27458122 398507422 3 987554257 399092415 924260278 3 984128569 125199021 716360525 3 529589236 45783262 313507287 3 645443456 85994112 226010681 3 914820717 228360911 572267310 3 418958362 56703604 195276041 3 64461646 26764720 26995581 3 914535039 ...
output:
437202656.0000000000 254998762.5000000000 770302316.6666666269 608562705.0000000000 296293261.6666666865 252713443.5000000000 571816312.6666666269 140192962.5000000000 32115392.5000000000 374079296.5000000000 382950166.0000000000 779975824.3333333731 271383850.5000000000 430086448.0000000000 3585531...
result:
wrong answer 1st numbers differ - expected: '833782882.6666666', found: '437202656.0000000', error = '0.4756397'