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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 |
---|---|---|---|---|---|---|---|---|---|
#808868 | #9871. Just another Sorting Problem | ucup-team1004# | WA | 1ms | 4012kb | C++20 | 2.0kb | 2024-12-11 09:02:31 | 2024-12-11 09:02:36 |
Judging History
answer
#include<bits/stdc++.h>
#define Gc() getchar()
#define Me(x,y) memset(x,y,sizeof(x))
#define Mc(x,y) memcpy(x,y,sizeof(x))
#define d(x,y) ((m)*(x-1)+(y))
#define R(n) (rnd()%(n)+1)
#define Pc(x) putchar(x)
#define LB lower_bound
#define UB upper_bound
#define fi first
#define se second
#define eb emplace_back
#define all(x) x.begin(),x.end()
using namespace std;using ll=long long;using db=double;using lb=long db;using ui=unsigned;using ull=unsigned long long;using pii=pair<int,int>;
const int N=2e5+5,M=N*4+5,K=1000+5,mod=998244353,Mod=mod-1;const db eps=1e-9;const int INF=1e9+7;mt19937 rnd(28382);
#define Tp template<typename T>
#define Ts template<typename T,typename... Ar>
namespace Debug{
Tp void _debug(char* f,T t){cerr<<f<<'='<<t<<endl;}
Ts void _debug(char* f,T x,Ar... y){while(*f!=',') cerr<<*f++;cerr<<'='<<x<<",";_debug(f+1,y...);}
#ifdef LOCAL
#define gdb(...) _debug((char*)#__VA_ARGS__,__VA_ARGS__)
#else
#define gdb(...) void()
#endif
}using namespace Debug;
int n,A[N];
char token[10];
map<vector<int>,int> f[2];
int dfs(vector<int> A,int op){
int flag=0;
for(int i=0;i<n;i++) if(A[i]^i+1) flag=1;
if(!flag) return 1;
// gdb(A[0],A[1],A[2],op);
if(f[op].count(A)) return 0;
f[op][A]=0;
if(op){
for(int x=0;x<n;x++) for(int y=x+1;y<n;y++){
swap(A[x],A[y]);
if(dfs(A,0)) return f[op].erase(A),1;
swap(A[x],A[y]);
}
f[op].erase(A);
return 0;
}else{
for(int x=1;x<n;x++){
swap(A[x],A[x-1]);
if(!dfs(A,1)) return f[op].erase(A),0;
swap(A[x],A[x-1]);
}
f[op].erase(A);
return 1;
}
}
void Solve(){
scanf("%d%s",&n,token+1);
int op=(token[1]=='A');
vector<int> A(n);
for(int i=1;i<=n;i++) scanf("%d",&A[i-1]);
int cnt=0;
for(int i=1;i<=n;i++) if(A[i-1]^i) cnt++;
if(op&&cnt==2){
puts("Alice");
return;
}
if(!op&&n>4){
puts("Bob");
return;
}
f[0].clear();f[1].clear();
puts(dfs(A,op)?"Alice":"Bob");
}
int main(){
int t=1;
scanf("%d",&t);
while(t--) Solve();
cerr<<clock()*1.0/CLOCKS_PER_SEC<<'\n';
}
详细
Test #1:
score: 100
Accepted
time: 0ms
memory: 3872kb
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: 4012kb
input:
2 2 Alice 2 1 2 Bob 2 1
output:
Alice Alice
result:
ok 2 lines
Test #3:
score: -100
Wrong Answer
time: 1ms
memory: 3888kb
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 Bob Alice Alice Bob Bob Alice Bob Bob
result:
wrong answer 3rd lines differ - expected: 'Alice', found: 'Bob'