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;
using ll=long long;
const int MAX1=101;
const int MAX2=51;
const int INF=1e9+5;
int dp1[MAX1];
int dp2[MAX2][MAX2];
vector<int> a(MAX2);
int n, A, B, nas;
ll t=(1LL<<43)-1;
int ok;
void rek1(int i, int sof) {
if(sof==B+1) {
return;
}
if(i==n) {
ok=1;
return;
}
ll sum=0;
for(int j=i; j<n; j++) {
sum+=a[j];
if((sum|t)==t) {
dp1[j]=min(dp1[j], 1+(i?dp1[i-1]:0));
rek1(j+1, sof+1);
}
}
}
void rek2(int i, int sof) {
dp2[i][sof]=1;
if(sof==B+1) {
return;
}
if(i==n && sof>=A) {
ok=1;
return;
}
ll sum=0;
for(int j=i; j<n; j++) {
sum+=a[j];
if((sum|t)==t) {
if(dp2[j+1][sof+1]) {
continue;
}
rek2(j+1, sof+1);
}
}
}
int main() {
ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
cin >> n >> A >> B;
for(int i=0; i<n; i++) {
cin >> a[i];
}
if(A==1) {
for(int i=42; ~i; i--) {
t^=(1LL<<i);
for(int j=0; j<MAX1; j++) {
dp1[j]=INF;
}
ok=0;
rek1(0, 0);
if(ok==0) {
t^=(1LL<<i);
}
}
cout << t << '\n';
return 0;
}
for(int i=42; ~i; i--) {
t^=(1LL<<i);
for(int j=0; j<MAX2; j++) {
for(int k=0; k<MAX2; k++) {
dp2[j][k]=0;
}
}
ok=0;
rek2(0, 0);
if(ok==0) {
t^=(1LL<<i);
}
}
cout << t << '\n';
}
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