A1： $n \operatorname{and} 2^5-1$\
A2：看[这儿](https://www.luogu.com.cn/article/64i8g4a8)
by crz_qwq @ 2024-04-10 17:11:23
求一个关注
by crz_qwq @ 2024-04-10 17:14:56
第一题：
```cpp
#include <bits/stdc++.h>
using namespace std;
string s;
int n;
void print(int x){
if(!x) return ;
print(x>>1);
putchar(x&1^'0');
}
int main(){
cin>>s;
for(int i=0;i<s.size();i++) n^=((s[i]^'0')<<(s.size()-i-1));
print(n&((1<<5)-1));
return 0;
}
```
by houwz351 @ 2024-04-10 17:25:59