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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#817818 | #9871. Just another Sorting Problem | kenken714 | WA | 1ms | 3604kb | C++14 | 1.2kb | 2024-12-17 12:51:52 | 2024-12-17 12:51:53 |
Judging History
answer
#include "bits/stdc++.h"
using namespace std;
#define REP(i, n) for(int i = 0;i < n;i++)
#define REPR(i, n) for(int i = n;i >= 0;i--)
#define FOR(i, m, n) for(ll i = m;i < n;i++)
#define FORR(i, m, n) for(ll i = m;i >= n;i--)
#define REPO(i, n) for(ll i = 1;i <= n;i++)
#define ll long long
#define INF (ll)1ll << 60
#define MINF (-1 * INF)
#define ALL(n) n.begin(),n.end()
#define MOD (ll)1000000007
#define P pair<ll, ll>
struct BIT {
vector<ll> dat;
ll sz;
BIT(ll n) {
sz = n;
dat.resize(sz);
}
void add(int x, ll a){
for(ll i = x; i <= sz; i += i & -i)dat[i] += a;
}
ll sum(int x){
ll res = 0;
for(int i = x; i > 0; i -= i & -i) res += dat[i];
return res;
}
};
string solve(ll n, string s){
BIT bit(n + 5);
ll te = 0;
REP(i, n){
ll x;
cin >> x;
te += i - bit.sum(x);
bit.add(x, 1);
}
if(n == 2)return "Alice";
if((te % 2 == 1 and s == "Alice") or (te % 2 == 0 and s == "Bob"))return "Alice";
return "Bob";
}
int main() {
ll t;
cin >> t;
REP(i, t){
ll n;
string s;
cin >> n >> s;
cout << solve(n, s) << endl;
}
}
Details
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Test #1:
score: 100
Accepted
time: 1ms
memory: 3576kb
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: 0ms
memory: 3508kb
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: 3584kb
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: 1ms
memory: 3604kb
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'