Submission #587991

#	Time	Username	Problem	Language	Result	Execution time	Memory
587991		Jean7	XOR Sum (info1cup17_xorsum)	C++14	0 / 100	239 ms	568 KiB

xorsum

#include <bits/stdc++.h>
#define fastio ios_base::sync_with_stdio(0),cin.tie(0),cout.tie(0)
#define int long long

using namespace std ;

map <int,int> mp ;

signed main ()
{
    fastio ;
    int n , x , ans = 0 ;
    cin >> n ;
    for ( int i = 1 ; i <= n ; i++ )
    {
        cin >> x ;
        mp[x]++ ;
    }
    for ( auto it = mp.begin() ; it != mp.end() ; it++ )
        for ( auto itr = it ; itr != mp.end() ; itr++ )
            if ( ( it->first + itr->first ) * ( it->second + itr->second ) % 2 == 0 )
                ans ^= ( it->first + itr->first ) ;
    cout << ans ;
    return 0 ;
}

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