n, a, b = map(int, input().split())
l = list(map(int, input().split()))
ans = 0
c = 0
for i in l:
if i == 1:
if a != 0:
a -= i;ans += 1
elif b != 0:
ans += i;b -= 1;c += 1
elif c != 0:
ans += i;c -= 1
else:
if b != 0:
ans += i;b -= 1
print(sum(l)-ans)
#include<bits/stdc++.h>
#define ll long long
#define pb push_back
using namespace std;
int main(){
ll n,a,b;
cin>>n>>a>>b;
ll x=0;
ll c=0;
for(int i=0;i<n;++i){
ll k;
cin>>k;
if(k==1){
if(a>0){
a--;
}
else if(b>0){
b--;
x++;
}
else if(x>0){
x--;
}
else c++;
}
if(k==2){
if(b>0){
b--;
} else c=c+2;
}
}
cout<<c<<endl;
}281A - Word Capitalization | 1646A - Square Counting |
266A - Stones on the Table | 61A - Ultra-Fast Mathematician |
148A - Insomnia cure | 1650A - Deletions of Two Adjacent Letters |
1512A - Spy Detected | 282A - Bit++ |
69A - Young Physicist | 1651A - Playoff |
734A - Anton and Danik | 1300B - Assigning to Classes |
1647A - Madoka and Math Dad | 710A - King Moves |
1131A - Sea Battle | 118A - String Task |
236A - Boy or Girl | 271A - Beautiful Year |
520B - Two Buttons | 231A - Team |
479C - Exams | 1030A - In Search of an Easy Problem |
158A - Next Round | 71A - Way Too Long Words |
160A - Twins | 1A - Theatre Square |
1614B - Divan and a New Project | 791A - Bear and Big Brother |
1452A - Robot Program | 344A - Magnets |