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Codeforces Round #803 (Div. 2)
2022-07-06 17:59:00 【Stellaris_ L】
A - XOR Mixup
The main idea of the topic :
To one with n Array of Numbers , Among them is 1 The number is another n-1 XOR sum of numbers , Find this number .
practice :
Because there must be a solution , So the XOR sum of the whole array is 0, Just choose one at will .
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
const int N=2e5+10;
int T,n;
void slove(){
int n;
cin>>n;
int ans;
for(int i=0;i<n;i++){
cin>>ans;
}
cout<<ans<<endl;
}
int main(){
cin>>T;while(T--)
slove();
return 0;
}
B - Rising Sand
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