#include "peru.h"
#include <bits/stdc++.h>

using std::cin;
using std::cout;
using std::endl;
using std::vector;
using std::string;
using ll = long long;
using vi = vector<ll>;
using vii = vector<vi>;
using pii = std::pair<ll,ll>;

#define ln "\n"
#define pb emplace_back
#define mp std::make_pair
#define mtp std::make_tuple
#define rep(i,j,k) for(ll i=ll(j); i<ll(k); i++)
#define REP(i,j,k) for(ll i=ll(j); i<=ll(k); i++)
#define per(i,j,k) for(ll i=ll(j); i>=ll(k); i--)
#define all(a) a.begin(),a.end()

constexpr ll inf = (1ll<<60);
constexpr ll mod = 1e9+7;
constexpr ll mul = 23;

int solve(int n, int k, int* v){
    assert(n <= 2000);
    vi dp(n+1, inf);
    dp[0] = 0;
    rep(i,0,n){
        ll max = 0;
        per(j,i,std::max(0ll, i-k+1)){
            max = std::max(max, ll(v[j]));
            dp[i+1] = std::min(dp[i+1], dp[j]+max);
        }
    }
    ll ret = 0;
    rep(i,0,n){
        ret = ret*mul+dp[i+1];
        ret %= mod;
    }
    return ret;
}

implementer.cpp: In function ‘int main()’:
implementer.cpp:34:13: error: ‘fout’ was not declared in this scope; did you mean ‘out’?
   34 |     fprintf(fout, "%d\n", sol);
      |             ^~~~
      |             out
implementer.cpp: In function ‘char nextch()’:
implementer.cpp:15:31: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   15 |     if (pos == BUF_SIZE) fread(buf, BUF_SIZE, 1, fin), pos = 0;
      |                          ~~~~~^~~~~~~~~~~~~~~~~~~~~~~