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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#807347 | #9871. Just another Sorting Problem | Wzy# | WA | 1ms | 5628kb | C++14 | 1.1kb | 2024-12-09 21:43:21 | 2024-12-09 21:43:22 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
typedef long long LL;
typedef pair<LL,LL> PII;
const int N=2e5+10,M=2e6;
const int mod=998244353;
const LL P=1e9+7;
const LL INF=1e18;
LL h[N],e[M],ne[M],w[M],idx;
LL d[N];
int n;
LL tr[N];
int lowbit(int x)
{
return x & -x;
}
void add(int x, int c)
{
for (int i = x; i <= n; i += lowbit(i)) tr[i] += c;
}
LL sum(int x)
{
LL res = 0;
for (int i = x; i; i -= lowbit(i)) res += tr[i];
return res;
}
void solve(){
string s1,s2;
cin>>n>>s1;
if(s1=="Alice") s2="Bob";
else s2="Alice";
for(int i=0;i<=n;i++) tr[i]=0;
vector<int> a(n);
for(int i=0;i<n;i++){
cin>>a[i];
}
LL res=0;
for(int i=0;i<n;i++){
int t=sum(n)-sum(a[i]);
res+=t;
add(a[i],1);
}
if(res==0) cout<<"Alice"<<endl;
else if(res%2) cout<<s1<<endl;
else cout<<s2<<endl;
}
int main() {
ios::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
int T=1;
cin>>T;
while(T--) solve();
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 1ms
memory: 5628kb
input:
3 2 Alice 2 1 3 Bob 1 3 2 10 Bob 1 2 3 4 5 6 7 8 10 9
output:
Alice Bob Bob
result:
ok 3 lines
Test #2:
score: -100
Wrong Answer
time: 1ms
memory: 5584kb
input:
2 2 Alice 2 1 2 Bob 2 1
output:
Alice Bob
result:
wrong answer 2nd lines differ - expected: 'Alice', found: 'Bob'