제출 #674678

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
674678	2022-12-25 18:57:51	Vahe	자매 도시 (APIO20_swap)	C++17	7 / 100	163 ms	10428 KiB

swap

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#include "swap.h"
#include <iostream>
#include <vector>
#include <algorithm>
#include <climits>
using namespace std;
int n, m;
vector<int> u_, v_, w, ver, var, par, P, p, her, sizes;
int get(int u)
{
    if (u == par[u]) return u;
    return get(par[u]);
}
void union_chains(int u, int v, int w)
{
    int a = get(u), b = get(v);
    if (a == b)
    {
        P[a] = min(P[a], w);
        return;
    }
    if (sizes[a] < sizes[b]) swap(a, b), swap(u, v);
    sizes[a] += sizes[b];
    par[v] = par[u];
    her[v] = w;
    if      (u == ver[a] && v == ver[b]) ver[a] = var[b];
    else if (u == ver[a] && v == var[b]) ver[a] = ver[b];
    else if (u == var[a] && v == ver[b]) var[a] = var[b];
 
 
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