Submission #389397

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
389397	2021-04-14 03:56:15	casperwang	XOR Sum (info1cup17_xorsum)	C++14	7 / 100	1698 ms	600 KiB

xorsum

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#include <bits/stdc++.h>
using namespace std;
#define debug(args...) kout("[ " + string(#args) + " ]", args)
void kout() { cerr << endl; }
template <class T, class ...U> void kout(T a, U ...b) { cerr << a << ' ',kout(b...); }
template <class T> void pary(T L, T R) { while (L != R) cerr << *L << " \n"[++L==R]; }
const int MAXN = 1000000;
int N;
int a[MAXN+1];
int ans;
signed main() {
  ios_base::sync_with_stdio(0), cin.tie(0);
  cin >> N;
  for (int i = 1; i <= N; i++) {
    cin >> a[i];
    for (int j = 1; j <= i; j++)
      ans ^= (a[i] + a[j]);
  }
  cout << ans << '\n';
  return 0;
}
 
 
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• Subtask 1: 7 / 7
• Subtask 2: 0 / 11
• Subtask 3: 0 / 21
• Subtask 4: 0 / 38
• Subtask 5: 0 / 23