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>
#define fast cin.tie(0)->sync_with_stdio(0);
#define int long long
#define inf ((int)1e18)
using namespace std;
vector <int> arr(101), pref(101);
bool solve(int val, int n, int a, int b) {
vector<int> dp(n + 1, inf);
dp[0] = 0;
for(int i = 1; i <= n; i++) {
for(int from = 0; from < i; from++) {
if(((pref[i] - pref[from]) & val) == 0) {
dp[i] = min(dp[i], dp[from] + 1); // dp[i] = i'ye kadar min kaç bölmelendirmeyle value'ya ulaşılabilinir
}
}
}
return (dp[n] <= b);
}
int32_t main(){
fast
int n, a, b;
cin >> n >> a >> b;
for(int i = 1; i <= n; i++) {
cin >> arr[i];
pref[i] = pref[i-1] + arr[i];
}
int val = 0;
for(int bit = (1ll << 60ll); bit > 0; bit /= 2) {
bool ans = solve(val + bit, n, a, b);
val += ans * bit;
}
cout << (((1ll << 61ll) - 1) ^ val) << "\n";
}
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