# | 제출 시각 | 아이디 | 문제 | 언어 | 결과 | 실행 시간 | 메모리 |
---|---|---|---|---|---|---|---|
1139119 | KasymK | XOR Sum (info1cup17_xorsum) | C++20 | 4 ms | 328 KiB |
#include "bits/stdc++.h"
using namespace std;
#define ff first
#define ss second
#define all(v) v.begin(), v.end()
#define ll long long
#define pb push_back
#define pii pair<int, int>
#define pli pair<ll, int>
#define pll pair<ll, ll>
#define tr(i, c) for(auto i = c.begin(); i != c.end(); ++i)
#define wr puts("----------------")
template<class T>bool umin(T& a,T b){if(a>b){a=b;return 1;}return 0;}
template<class T>bool umax(T& a,T b){if(a<b){a=b;return 1;}return 0;}
const int N = 4e3+5;
int v[N];
int main(){
int n;
scanf("%d", &n);
for(int i = 1; i <= n; ++i)
scanf("%d", v+i);
int answer=0;
for(int i = 1; i <= n; ++i)
for(int j = i; j <= n; ++j)
answer^=(v[i]+v[j]);
printf("%d\n", answer);
return 0;
}
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