Submission #878989

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
878989	2023-11-26 03:40:06	12345678	Election Campaign (JOI15_election_campaign)	C++17	20 / 100	1040 ms	30552 KiB

election_campaign

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#include <bits/stdc++.h>
using namespace std;
const int nx=1e5+5, kx=17;
int n, m, a[nx], b[nx], c[nx], u, v, dp1[nx], dp2[nx], lvl[nx], pa[nx][kx];
vector<int> d[nx], l[nx];
void dfs(int u, int p)
{
    lvl[u]=lvl[p]+1;
    pa[u][0]=p;
    for (int i=1; i<kx; i++) pa[u][i]=pa[pa[u][i-1]][i-1];
    for (auto v:d[u]) if (v!=p) dfs(v, u);
}
int lca(int u, int v)
{
    if (lvl[u]>lvl[v]) swap(u, v);
    for (int i=kx-1; i>=0; i--) if (lvl[pa[v][i]]>=lvl[u]) v=pa[v][i];
    if (u==v) return v;
    for (int i=kx-1; i>=0; i--) if (pa[u][i]!=pa[v][i]) u=pa[u][i], v=pa[v][i];
    return pa[u][0];
}
void dfs2(int u, int p)
{
    for (auto v:d[u]) if (v!=p) dfs2(v, u), dp2[u]+=dp1[v];
    dp1[u]=dp2[u];
 
 
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• Subtask 1: 10 / 10
• Subtask 2: 0 / 5
• Subtask 3: 0 / 5
• Subtask 4: 0 / 30
• Subtask 5: 10 / 10
• Subtask 6: 0 / 40