Submission #289217

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
289217	2020-09-02 13:12:07	dolphingarlic	Swapping Cities (APIO20_swap)	C++14	100 / 100	482 ms	55592 KiB

swap

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#include "swap.h"
#include <bits/stdc++.h>
using namespace std;
pair<int, pair<int, int>> edges[200000];
int cmp[300000], deg[300000], cost[300000], nodes;
bool has_deg_3[300000], has_cycle[300000];
vector<int> dsu_tree[300000];
int tin[300000], tout[300000], timer = 0, anc[300000][20];
int find(int A) {
    while (A != cmp[A]) A = cmp[A], cmp[A] = cmp[cmp[A]];
    return A;
}
void onion(int A, int B) {
    has_cycle[nodes] = has_cycle[find(A)] || has_cycle[find(B)];
    if (find(A) == find(B)) has_cycle[nodes] = true;
    has_deg_3[nodes] = has_deg_3[find(A)] || has_deg_3[find(B)];
    if (deg[A] == 3 || deg[B] == 3) has_deg_3[nodes] = true;
    dsu_tree[nodes].push_back(find(A));
    if (find(A) != find(B)) dsu_tree[nodes].push_back(find(B));
    cmp[find(A)] = cmp[find(B)] = nodes;
    nodes++;
}
void dfs(int node = nodes - 1, int parent = -1) {
    tin[node] = timer++;
    for (int i = 1; i < 20; i++) anc[node][i] = -1;
 
 
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• Subtask 1: 6 / 6
• Subtask 2: 7 / 7
• Subtask 3: 17 / 17
• Subtask 4: 20 / 20
• Subtask 5: 23 / 23
• Subtask 6: 27 / 27