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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#807349#9871. Just another Sorting ProblemWzy#WA 1ms5908kbC++141.1kb2024-12-09 21:46:022024-12-09 21:46:03

Judging History

你现在查看的是最新测评结果

  • [2024-12-09 21:46:03]
  • 评测
  • 测评结果:WA
  • 用时:1ms
  • 内存:5908kb
  • [2024-12-09 21:46:02]
  • 提交

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'