This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include<bits/stdc++.h>
using namespace std;
#define debug(x) cout << '[' << #x << " is: " << x << "] " << endl;
#define imod(a , n) (a % n + n ) % n
#define fastio ios_base::sync_with_stdio(false);cin.tie(0);
#define inF freopen("input.txt","r",stdin );
#define outF freopen("output.txt" , "w" , stdout ) ;
#define sor(v) sort(v.begin() , v.end());
#define print(v) for(auto f : v ) cout << f << " " ;
#define rsor(v) sort(v.rbegin() , v.rend());
#define rev(v) reverse(v.begin() , v.end());
#define lp(i , n) for(int x = i ; x < n ; x ++)
#define ll long long
#define read(arr , x , n) for(int i = x ; i < n ; i ++ )cin >> arr[i];
#define vector deque
const double eps = 1e-6, PI = acos(-1) ;
const long long OO = 1e18 ;
const ll N = 2e3 + 3 , oo = 1e9 + 1, M = 2000002, mod = 1e9 + 7, K = 12;
const int di[] = {1, -1, 0, 0 , 1 , 1 , -1 , -1};
const int dj[] = {0, 0, 1, -1 , 1 , -1 , 1 , -1};
int n , a , b , arr[N];
int invalid = oo;
ll calc(int idx , int rest , ll sum ){//cout << idx << " " << rest << " " << sum << endl ;
if(n - idx <= rest)
return invalid ;
if(rest == 0){
ll ret = 0 ;
while(idx < n)ret += arr[idx ++];
return ret ;
}
ll first = OO , second ;
first = sum | calc(idx + 1 , rest - 1 , arr[idx + 1]);
//cout << sum << " " ;debug(first);
second = calc(idx + 1 , rest , sum + arr[idx + 1]);
return min(first , second);
}
int32_t main()
{
//inF;outF;
fastio;
// Dont Forget memset
cin >> n >> a >> b ;
for(int i = 0 ;i < n ; i ++)
cin >> arr[i];
ll mnans = OO ;
while(a <= b){
mnans = min(mnans , calc(0 , a , arr[0]));
//debug(mnans);
//break;
a ++ ;
}
cout << mnans ;
}
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