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;
//Fast
int main(){
ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
int n,a,b;
cin>>n>>a>>b;
long long arr[n+1] = {0};
for(int i = 0;i<n;i++){
cin>>arr[i];
}
int dp[n+1] = {0};
dp[n] = 0;
long long num = (1LL<<40)-1 , sum = 0;int mi = 1e9;
for(long long bi = 39;bi>=0;bi--){
num^=(1LL<<bi);
for(int i = n-1;i>=0;i--){
sum = arr[i];
mi = 1e9;
for(int j = i+1;j<=n;j++){
if((sum|num)==num){
mi = min(mi,dp[j]+1);
}
sum+=arr[j];
}
dp[i] = mi;
}
if(dp[0]>b){
num^=(1<<bi);
}
}
cout<<num<<endl;
}
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