Submission #521834

#	Time	Username	Problem	Language	Result	Execution time	Memory
521834		iskhakkutbilim	XOR Sum (info1cup17_xorsum)	C++14	0 / 100	1683 ms	96880 KiB

xorsum

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define ff first
#define ss second
const int INF = 1e9 + 7;
const int N = 1e5 + 1;


void solve(){
	
}

main(){
	int n; cin >> n;
	vector<int> a(n);
	multiset<int> st;
	for(int i = 0;i < n; i++){
		cin >> a[i];
	}
	for(int i = 0;i < n; i++){
		for(int j = i;j < n; j++){
			st.insert(a[i] + a[j]);
			// cout << a[i] + a[j] << "\n";
		}
	}
	int xr = 0;
	for(auto x : st){
	
		xr^= x;
	}
	// cout << "\n" << "------" << "\n";
	cout << xr;
	return 0;
}

Compilation message (stderr)

xorsum.cpp:14:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   14 | main(){
      | ^~~~

• Subtask 1: 0 / 7
• Subtask 2: 0 / 11
• Subtask 3: 0 / 21
• Subtask 4: 0 / 38
• Subtask 5: 0 / 23