Submission #297231

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
297231	2020-09-11 11:54:35	PeppaPig	Swapping Cities (APIO20_swap)	C++14	100 / 100	623 ms	61876 KiB

swap

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#include "swap.h"
#include <bits/stdc++.h>
#define iii tuple<int, int, int>
using namespace std;
const int N = 3e5 + 5;
int dsu[N];
int find(int x) { return dsu[x] = x == dsu[x] ? x : find(dsu[x]); }
int n, m, ptr;
int cost[N], deg[N], has_3[N], has_cycle[N], par[N][20], dep[N];
vector<int> g[N];
void onion(int a, int b) {
    has_3[ptr] = has_3[find(a)] | has_3[find(b)]; 
    has_cycle[ptr] = has_cycle[find(a)] | has_cycle[find(b)]; 
    if(deg[a] >= 3 || deg[b] >= 3) has_3[ptr] = 1;
    g[ptr].emplace_back(find(a));
    if(find(a) == find(b)) has_cycle[ptr] = 1;
    else g[ptr].emplace_back(find(b));
    dsu[find(a)] = dsu[find(b)] = ptr;
}
 
 
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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