Submission #942780

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
942780	2024-03-11 04:37:44	Darren0724	The Xana coup (BOI21_xanadu)	C++17	100 / 100	68 ms	33896 KiB

xanadu

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#include <bits/stdc++.h>
using namespace std;
#define LCBorz ios_base::sync_with_stdio(false); cin.tie(0);
#define int long long
#define all(x) x.begin(), x.end()
#define endl '\n'
const int N=200005;
const int INF=1e9;
vector<int> adj[N];
vector dp(4,vector<int>(N,INF));
vector v(N,0);
void dfs(int k,int pa){
    vector<int> dp0,dp1;
    int t0=0,t1=0;
    for(int j:adj[k]){
        if(j==pa)continue;
        dfs(j,k);
        t0+=dp[0][j];
        dp0.push_back({dp[1][j]-dp[0][j]});
        t1+=dp[2][j];
        dp1.push_back({dp[3][j]-dp[2][j]});
    }
    sort(all(dp0));
    sort(all(dp1));
    int now=v[k]*2;
    dp[now][k]=min(dp[now][k],t0);
    for(int j:dp0){
        now^=2;
        t0+=j;
        dp[now][k]=min(dp[now][k],t0);
 
 
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• Subtask 1: 5 / 5
• Subtask 2: 15 / 15
• Subtask 3: 10 / 10
• Subtask 4: 40 / 40
• Subtask 5: 30 / 30