#include "traffic.h"
#include <bits/stdc++.h>
#define _USE_MATH_DEFINES
#define INF LLONG_MAX
#define MOD 1000000007
#define endl "\n"
#define sp " "
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define f1(i, x) for(auto &i : x)
#define f2(i, x, j) for(ll i = j; i < x; i++)
#define raya() cout << endl << "====================================" << endl
#define dbg(x) cerr << #x << ": " << x << endl;
using namespace std;
using ll = long long;
int LocateCentre(int n, int p[], int s[], int d[]){
vector<int> pref(n + 1);
f2(i, n, 0){
pref[i + 1] = p[i] + pref[i];
}
int ansa = 0, ma = pref[n];
f2(i, n + 1, 1){
int x = pref[i - 1];
int y = pref[n] - pref[i];
int t = max(x, y);
if(t < ma){
ansa = i - 1;
ma = t;
}
}
return ansa;
}
