#include "peru.h"
#include <bits/stdc++.h>
using namespace std;
#define N 2500001
#define nl '\n'
#define ff first
#define ss second
#define add insert
#define ll long long
#define ld long double
#define terminator main
#define pll pair<ll,ll>
#define append push_back
#define pii pair<int,int>
#define all(x) (x).begin(),(x).end()
#define L0TA ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL)
ll x[N];
int a[N];
int mod = 1e9 + 7;
int add(int x, int y){
return (x + y) % mod;
}
int mul(int x, int y){
return (1ll * x * y) % mod;
}
int solve(int n, int k, int* v){
int mx, ans, c;
for(int i = 0; i < n; i++)
a[i + 1] = v[i];
for(int i = 1; i <= n; i++){
x[i] = x[i - 1] + a[i];
mx = a[i];
for(int j = i - 1; j > max(i - k, 0); j--){
mx = max(mx, a[j]);
x[i] = min(x[i], x[j - 1] + mx);
}
}
c = 1;
ans = 0;
for(int i = n; i > 0; i--){
x[i] %= mod;
ans = add(ans, mul(x[i], c));
c = mul(c, 23);
}
return ans;
}
