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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 |
|---|---|---|---|---|---|---|---|---|---|
| #68485 | #4797. Xormites | A_zjzj | WA | 2ms | 3660kb | C++14 | 625b | 2022-12-16 20:23:26 | 2022-12-16 20:23:27 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;using ll=long long;const int N=5e4+10;
int T,n,s,a[N];char buf[3][10]={"Draw","First","Second"};
int get(){
s=0;scanf("%d",&n);for(int i=1;i<=n;i++)scanf("%d",&a[i]),s^=a[i];
if(!s)return 0;if(!(n&1))return 1;for(int i=__lg(s);~i;i--)if(s>>i&1){
for(int j=1;j<=n;j++)a[j]=a[j]>>i&1;
int l=1,r=n,now=0;
for(;l<=r&&a[l]==a[r];l++,r--)now^=a[l];
if(l>r)return now&1?1:2;
int cnt=0;
for(int j=l;j<r;j++)cnt+=a[j]^a[j+1],now^=a[j];
if(cnt>1)return 1;
return now&1?1:2;
}return 0;
}
int main(){
for(scanf("%d",&T);T--;)puts(buf[get()]);return 0;
}
详细
Test #1:
score: 100
Accepted
time: 2ms
memory: 3660kb
input:
3 2 3 3 2 3 5 3 4 4 4
output:
Draw First Second
result:
ok 3 lines
Test #2:
score: -100
Wrong Answer
time: 2ms
memory: 3528kb
input:
12 10 1 3 1 3 3 3 2 1 3 3 10 1 3 3 3 1 3 2 1 1 3 9 1 2 3 3 3 1 2 2 3 9 1 3 2 1 3 3 2 2 2 10 3 2 2 2 3 3 1 2 1 2 10 2 1 2 3 3 3 3 2 3 2 10 2 1 1 3 3 1 1 1 2 1 10 2 1 1 1 1 1 1 2 2 3 10 2 1 2 1 1 2 2 3 3 3 9 2 2 1 1 3 3 1 2 3 9 1 3 3 2 2 2 2 3 2 10 1 1 1 1 1 2 2 2 1 2
output:
First First First First First First Draw First First Draw Draw Draw
result:
wrong answer 3rd lines differ - expected: 'Second', found: 'First'