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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#807349 | #9871. Just another Sorting Problem | Wzy# | WA | 1ms | 5908kb | C++14 | 1.1kb | 2024-12-09 21:46:02 | 2024-12-09 21:46:03 |
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(n==2) 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: 3632kb
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: 0
Accepted
time: 1ms
memory: 5648kb
input:
2 2 Alice 2 1 2 Bob 2 1
output:
Alice Alice
result:
ok 2 lines
Test #3:
score: 0
Accepted
time: 1ms
memory: 5908kb
input:
10 3 Bob 2 3 1 3 Alice 3 1 2 3 Bob 3 1 2 3 Alice 1 3 2 3 Alice 3 2 1 3 Bob 2 1 3 3 Bob 1 3 2 3 Alice 2 1 3 3 Alice 2 3 1 3 Bob 3 2 1
output:
Alice Bob Alice Alice Alice Bob Bob Alice Bob Bob
result:
ok 10 lines
Test #4:
score: -100
Wrong Answer
time: 0ms
memory: 5564kb
input:
46 4 Alice 4 1 3 2 4 Bob 4 1 3 2 4 Bob 3 2 4 1 4 Bob 2 4 1 3 4 Bob 1 4 3 2 4 Bob 4 1 2 3 4 Alice 1 2 4 3 4 Alice 3 2 1 4 4 Bob 2 1 4 3 4 Bob 4 3 1 2 4 Alice 1 3 2 4 4 Bob 3 1 4 2 4 Bob 1 3 2 4 4 Alice 2 4 1 3 4 Bob 2 1 3 4 4 Alice 2 1 3 4 4 Bob 4 2 3 1 4 Bob 3 4 2 1 4 Alice 4 1 2 3 4 Bob 2 4 3 1 4 B...
output:
Bob Alice Alice Bob Bob Bob Alice Alice Alice Bob Alice Bob Bob Alice Bob Alice Bob Bob Alice Alice Alice Bob Alice Alice Alice Bob Alice Bob Bob Bob Alice Alice Alice Bob Bob Bob Bob Bob Alice Bob Alice Alice Bob Alice Bob Alice
result:
wrong answer 2nd lines differ - expected: 'Bob', found: 'Alice'