제출 #563157

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
563157	2022-05-16 11:43:17	Aktan	자매 도시 (APIO20_swap)	C++14	6 / 100	144 ms	20836 KiB

swap

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#include "swap.h"
#include <bits/stdc++.h>
using namespace std;
#ifndef EVAL
#include "grader.cpp"
#endif
vector<int> e[100005];
int used[100005],mx=0;
int ans=0;
void dfs(int x,int p){
  if(e[x].size()==1){
    ans=-1;
    return;
  }
  if(ans==-1){
    return;
  }
  used[x]++;
  for(auto w : e[x]){
    if(used[w]==0){
      dfs(w,x);
    }
  }
}
void init(int N, int M, vector<int> U, vector<int> V, vector<int> W){
  for(int i=0;i<M;i++){
    e[U[i]].push_back(V[i]);
    e[V[i]].push_back(U[i]);
 
 
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