//
#include<bits/stdc++.h>
using namespace std;
#define int long long
#define pii pair<int ,int>
#define v vector
#define all(a) a.begin() , a.end()
signed main(){
int n , s , k;
cin>>n>>s>>k;
vector<int> d(n + 1 , 0) , di(n + 1, 0);
for(int i = 1 ; i <= n-1; i++){
cin>>di[i];
}
v<int> v(n +1, 0) , impact(n + 1 , 0) , p(n + 1 , 0);
for(int i = 1 ;i <= n ; i++)cin>>v[i];
for(int i = 1; i<=n;i++){
p[i] = p[i-1]+v[i];
}
// cout << d[0] << " ";
d[1] = 0;
// cout << d[1] <<" ";
for(int i = 2 ; i <= n ; i++){
d[i] = di[i - 1] + d[i - 1];
// cout << d[i] << " ";
}
// cout << "\n";
for(int i = 1 ;i<=n;i++){
int left = max(0LL , d[i] - k);
int right = min(d[n] , d[i] + k);
int left_idx = max(0LL ,( (long long)(lower_bound(all(d) , left) - d.begin()) - 1LL));
int right_idx = ((long long)(upper_bound(all(d) , right) - d.begin())) - 1LL;
// cout << left_idx << " "<<right_idx << "\n";
int sum = 0;
sum += p[i] - p[left_idx];
sum += p[right_idx] - p[i - 1];
impact[i] = sum - v[i];
// cout << impact[i] << " ";
}
cout << 1 << "\n";
int ans = max_element(impact.begin() , impact.end()) - impact.begin();
cout << ans;
}
