Submission #880765

#	Time	Username	Problem	Language	Result	Execution time	Memory
880765		lampooppp	Džumbus (COCI19_dzumbus)	C++17	0 / 110	1056 ms	9052 KiB

dzumbus

#include <bits/stdc++.h>
using namespace std;

const int inf = 1e9;
const int N=1e3+100;
vector<int> adj[N+1];
int d[N+1],n,m;
bool avail[N+1];
int dp[N+1][N+1][2], sz[N+1];

void dfs(int u, int par)
{
    avail[u]=1;
    for(int v : adj[u])
    {
        if(v!=par) dfs(v, u);
    }
}

void solve(int u, int par)
{
    dp[u][0][1]=d[u];
    dp[u][0][0]=0;
    sz[u]=1;
    for(int v : adj[u])
    {
        if(v!=par)
        {
            solve(v,u);
            for(int j = sz[u]; j>=0;--j)
            {
                for(int k = sz[v]; k >=0;--k)
                {
                    dp[u][j+k][0] = min(dp[u][j+k][0], dp[u][j][0] + min(dp[v][k][1], dp[v][k][0]));
                    if(j>0) dp[u][j+k][1] = min(dp[u][j+k][1], dp[u][j-1][1] + dp[v][k][1]);
                    if(k>0) dp[u][j+k][1] = min(dp[u][j+k][1], dp[u][j][1] + dp[v][k-1][1]);
                    if(j>0 && k>0) dp[u][j+k][1] = min(dp[u][j+k][1], dp[u][j-1][0] + dp[v][k-1][0]+d[u]+d[v]);
                    dp[u][j+k][1] = min(dp[u][j+k][1], dp[u][j][1] + dp[v][k][0]);
                }
            }
        }
        sz[u]+=sz[v];
    }
}

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    int n,m;
    cin >> n >> m;
    for(int i=1;i<=n;++i) cin >> d[i];
    for(int i=1;i<=m;++i)
    {
        int u,v;
        cin >> u >> v;
        adj[u].push_back(v);
        adj[v].push_back(u);
    }
    for(int i=1;i<=n;++i)
    {
        if(!avail[i]) dfs(i, 0);
        adj[0].push_back(i);
    }
    for(int i=0;i<=1000;++i)
    {
        for(int j=0;j<=1000;++j)
        {
            dp[i][j][0]=dp[i][j][1]=inf;
        }
    }
    solve(0,0);
    int q;
    cin >> q;
    while(q--)
    {
        int s;
        cin >> s;
        for(int i=m;i>=0;--i)
        {
            if(dp[0][i][0]<=s) {cout << i << '\n'; break;}
        }
    }
}

• Subtask 1: 0 / 20
• Subtask 2: 0 / 30
• Subtask 3: 0 / 30
• Subtask 4: 0 / 30