ZROI#984

ZROI#984

众所周知,异或是不进位的加法,也就是\(a\: xor \: b\le a+b\).
所以要最大化答案就全加起来好了.

\(Code:\)

#include <iostream>
#include <cstdlib>
#include <cstdio>
#define rint read<int>
#define int long long

template < class T >
    inline T read () {
        T x = 0 , f = 1 ; char ch = getchar () ;
        while ( ch < '0' || ch > '9' ) {
            if ( ch == '-' ) f = - 1 ;
            ch = getchar () ;
        }
        while ( ch >= '0' && ch <= '9' ) {
            x = ( x << 3 ) + ( x << 1 ) + ( ch - 48 ) ;
            ch = getchar () ;
        }
        return f * x ;
    }

const int N = 1e6 + 100 ;

int n , ans ;

signed main () {
    n = rint () ;
    for (int i = 1 ; i <= n ; ++ i) ans += rint () ;
    printf ("%lld\n" , ans ) ;
    return 0 ;
}