D - Make Them Equal

https://codeforces.com/contest/1633/problem/D
#include<bits/stdc++.h>
using namespace std;
#define int long long
const int mod = 1e9 + 7;
const int N= 1e6 + 10;

int n, k;
int b[N], c[N], v[N];


int qmi (int a, int b) {
    int ans = 1;
    while (b) {
        if (b & 1) ans = ans * a;
        a = a * a;
        b >>= 1;
    }
    return ans;
}
int get (int tar) {
    int ans = log(tar) / log(2);
    if (qmi(2, ans) == tar) return ans;
    
    queue<int> q;
    bool st[N] = {0};
    q.push(ans);
    map<int, int> dist;
    dist[ans] = 0;
    while(q.size()) {
        auto t = q.front(); q.pop();
        if (t == tar) {
            break;
        }
        for (int i = t; i >= 1; i --) {
            if (t + t / i <= tar) {
                q.push(t + t / i);
                dist[t + t / i] = dist[t] + 1;
            }
        }
    }
    return dist[ans] + ans;
}
void solve() {
    cin >> n >> k;
    int c[N];
    memset(c, 0x3f, sizeof c);
    c[1]= 0;
    for (int i = 1; i<= 1000; i ++) {
        for (int j =1; j<= i; j ++)
            if (i + i / j > i) continue;
            else c[i + i / j] = min (c[i + i / j], c[i] + 1);
    }
    for (int i = 1; i<= n; i ++) {
        cin >> b[i];
        v[i] = c[b[i]];
    }
    for (int i = 1; i <= n; i ++) cin >> c[i];
    int f[N] = {0};
    
    for (int i =1; i <= n ;i ++) {
        for (int j = k; j >= v[i]; j --)
            f[j] = max (f[j], f[j - v[i]] + c[i]);
    }
    cout << f[k] << endl;
}
signed main () {
    int t;
    cin >>t;
    while (t --) solve();
    
}

不要define int longlong 这题主要在于预处理部分。我用的是bfs超时了。应该用dp来预处理数组