#include "hexagon.h"
#include <bits/stdc++.h>
using namespace std;\
typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vii;
typedef pair<int,int> pi;
typedef vector<pi> pii;
typedef tuple<int,int,int> tii;
typedef vector<ll> li;
typedef vector<li> lii;
#define REP(i,a,b) for(int i=a;i<b;i++)
#define F first
#define S second
#define PB push_back
#define LSOne(s) ((s)&(-s))
const ll INF=1000000000000000010;
const int inf=1e9+10;
const ll M=1e9+7;
int draw_territory(int N, int A, int B, std::vector<int> D, std::vector<int> L) {
int k=L[0];
ll a=(ll)A;
ll b=(ll)B;
ll ans=(ll)A;
REP(i,1,k+1){
ans+=((ll)i+1LL)*(((ll)i*b+a)%M);
ans%=M;
}
return ans;
}
