Submission #253778

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
253778	2020-07-28 16:36:18	someone	Election Campaign (JOI15_election_campaign)	C++14	100 / 100	271 ms	47356 KiB

election_campaign

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#include <bits/stdc++.h>
#define int long long
using namespace std;
 
struct Way {
    int a, b, cost;
};
const int M = 1 << 18, N = 2*M;
vector<int> adj[M];
vector<Way> way[M];
int n, m, l = M, deb[M], fin[M], sum[M], a[N], par[N][19];
void DFS(int i, int pre) {
    deb[i] = l++;
    par[i][0] = pre;
    for(int j : adj[i])
        if(j != pre)
            DFS(j, i);
    fin[i] = l++;
}
bool isAnc(int a, int b) {
    if(a == -1) return true;
    return deb[a] <= deb[b] && fin[b] <= fin[a];
}
int LCA(int a, int b) {
    if(isAnc(a, b)) return a;
 
 
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• Subtask 1: 10 / 10
• Subtask 2: 5 / 5
• Subtask 3: 5 / 5
• Subtask 4: 30 / 30
• Subtask 5: 10 / 10
• Subtask 6: 40 / 40