[BOJ] 17352 여러분의 다리가 되어 드리겠습니다! (G5)

Author: uiop5809

박예진/7주차/260210.cpp

@@ -0,0 +1,48 @@
+// https://www.acmicpc.net/problem/17352
+
+#include <iostream>
+#include <algorithm>
+#include <vector>
+using namespace std;
+
+int N;
+int parent[300001];
+
+int getParent(int n) {
+  if (parent[n] == n) return n;
+  else return parent[n] = getParent(parent[n]);
+}
+
+void unionParent(int a, int b) {
+  int pa = getParent(a);
+  int pb = getParent(b);
+
+  if (pa < pb) parent[pb] = pa;
+  else parent[pa] = pb;
+}
+
+int main(){
+  ios_base::sync_with_stdio(false);
+  cin.tie(NULL); cout.tie(NULL);
+
+  cin >> N;
+  // 부모 노드 초기화
+  for(int i = 1; i <= N; i++){
+    parent[i] = i;
+  }
+
+  for(int i = 0; i < N - 2; i++){
+    int u, v;
+    cin >> u >> v;
+    unionParent(u, v);
+  } 
+
+  // 연결 안 된 노드 찾기
+  for(int i = 1; i < N; i++){
+    if (getParent(i) != getParent(i + 1)) {
+      cout << i << " " << i + 1;
+      break;
+    }
+  }
+  return 0;
+}