Submission #1140447

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
1140447	2025-01-26 23:48:48	mnbvcxz123	The Xana coup (BOI21_xanadu)	C++20	100 / 100	108 ms	29764 KiB

xanadu

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#include<bits/stdc++.h>
using namespace std;
using ll=long long;
constexpr int N=1e5+5;
constexpr int inf=1e9;
int n;
int dp[N][2][2];
int a[N];
vector<int>g[N];
void dfs(int v, int e){
    for(const int&i:g[v]){
        if(i==e)continue;
        dfs(i,v);
    }
    vector<int>all;
    ll tot=0;
    for(const int&i:g[v]){
        if(i==e)continue;
        tot+=dp[i][a[i]][0];
        all.push_back(dp[i][a[i]][1]-dp[i][a[i]][0]);
    }
    sort(all.begin(),all.end());
    vector<ll>p(all.size()+1);
    for(int i=1;i<=all.size();++i)
        p[i]=p[i-1]+all[i-1];
    vector<ll>mn(2,inf);
 
 
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• Subtask 1: 5 / 5
• Subtask 2: 15 / 15
• Subtask 3: 10 / 10
• Subtask 4: 40 / 40
• Subtask 5: 30 / 30