#include<iostream>
using namespace std;
int n, a[20], gp1, gp2, gp3, nf1, nf2, nf3, c_m;
int max(int a, int b) {
if(a>b)
return a;
return b;
}
void solve() {
for(int i=1;i<=n-nf2-nf3;i++) {
for(int j=i+nf1;j<=n-nf3;j++) {
for(int k=j+nf2;k<=n;k++) {
int c = 0;
for(int p=i;p<i+nf1;p++)
c += abs(gp1-p);
for(int p=j;p<j+nf2;p++)
c += abs(gp2-p);
for(int p=k;p<k+nf3;p++)
c += abs(gp3-p);
c += nf1 + nf2 + nf3;
c_m = min(c_m, c);
}
}
}
}
int main() {
cin>>n;
for(int i=0;i<20;i++) a[i] = 0;
cin>>gp1>>gp2>>gp3;
cin>>nf1>>nf2>>nf3;
c_m = 99999;
solve();
cout<<c_m<<endl;
return 0;
}
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