Submission #257799

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
257799	2020-08-04 20:11:39	VEGAnn	Village (BOI20_village)	C++14	100 / 100	122 ms	15856 KiB

Village

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#include <bits/stdc++.h>
#define sz(x) ((int)x.size())
#define PB push_back
#define i2 array<int,2>
using namespace std;
typedef long long ll;
const int N = 100100;
const int oo = 2e9;
set<i2> setik, oth;
vector<int> g[N], vc;
int n, siz[N], cen, who_kto[N], mrk[N];
ll ans, ANS;
void dfs(int v, int p){
    for (int u : g[v]){
        if (u == p) continue;
        dfs(u, v);
        if (mrk[u] < 0){
            ANS += 2;
            if (mrk[v] < 0){
                mrk[v] = u;
                mrk[u] = v;
            } else {
                mrk[u] = mrk[v];
                mrk[v] = u;
            }
        }
 
 
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• Subtask 1: 12 / 12
• Subtask 2: 38 / 38
• Subtask 3: 50 / 50