Submission #1013490

#	Time	Username	Problem	Language	Result	Execution time	Memory
1013490		amine_aroua	Nestabilnost (COI23_nestabilnost)	C++17	0 / 100	1497 ms	524288 KiB

code1

#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define int long long
#define nl '\n'
int n;
vector<int> a , b , f;
vector<map<int ,int>> possible_k;
vector<int> dp;
vector<vector<int>> adj;
vector<int> order;
void dfs(int x , int p)
{
    order.pb(x);
    for(auto u : adj[x])
    {
        if(u == p)
            continue;
        dfs(u , x);
    }
}
void read_in()
{
    order.clear();
    cin>>n;
//    n = rand()%1000 + 1;
    a.clear();
    a.assign(n , 0);
    possible_k.clear();
    possible_k.assign(n , map<int ,int>());
    b = a;
    f.clear();
    f.assign(n + 1 , 0);
    adj.assign(n , {});
    for(int i = 0 ; i < n ; i++)
    {
//        b[i] = rand()%n;
        cin>>b[i];
    }
    for(int i = 1 ; i <= n;i++)
    {
        cin>>f[i];
//        f[i] = rand()%10000 + 1;
    }
    for(int i = 1 ; i <= n - 1 ; i++)
    {
        int u , v;
        cin>>u>>v;
//        u = i , v = i + 1;
        u-- , v--;
        adj[u].pb(v);
        adj[v].pb(u);
    }
}
int solve()
{
    int mn = 1e9;
    for(int i = 1 ; i <= n ; i++)
        mn = min(mn , f[i]);
    if(n == 1)
    {
        return mn;
    }
    dfs(0 , -1);
    for(int i = 0 ; i < n ; i++)
        a[i] = b[order[i]];
    for(int i = 0 ; i + 1 < n ; i++)
    {
        int diff = abs(a[i] + 1 - a[i + 1]);
        vector<int> vals;
        if(diff == 0)
        {
            for(int j = 1 ; j <= n;j++)
            {
                vals.pb(j);
            }
        }
        else
        {
            for(int d = 1 ; d* d <= diff ; d++)
            {
                if(d * d == diff)
                {
                    vals.pb(d);
                }
                else if(diff % d == 0)
                {
                    vals.pb(d);
                    vals.pb(diff/d);
                }
            }
        }
        for(auto k : vals)
        {
            if(possible_k[i].count(k))
                continue;
            assert(k != 0);
            int last = i + 1;
            for( ; last < n && (abs(a[last - 1] - a[last] + 1) % k == 0); last++);
            for(int j = i; j < last ; j++)
            {
                possible_k[j][k] = last;
            }
        }
    }
    dp.clear();
    dp.assign(n + 1 , 1e18);
    dp[n] = 0;
    for(int i = n - 1 ; i >= 0 ; i--)
    {
        dp[i] = dp[i + 1] + mn;
        if(i + 1 < n)
        {
            for(auto [k , last] : possible_k[i])
            {
                dp[i] = min(dp[i] , dp[last] + f[k]);
            }
        }
    }
    for(int i = 0 ; i < n;i++)
        adj[i].clear();
    return dp[0];
}
signed main() {
    read_in();
    cout<<solve()<<nl;
}

• Subtask 1: 0 / 12
• Subtask 2: 0 / 20
• Subtask 3: 0 / 7
• Subtask 4: 0 / 22
• Subtask 5: 0 / 39