Feat: 골드4 사회망 서비스

Author: bel1c10ud

Diff for: 4주차/박종운/골드4__사회망_서비스.js

@@ -0,0 +1,42 @@
+const readline = require('readline');
+
+const rl = readline.createInterface({
+  input: process.execArgv.includes("--stack-size=65536") ? 
+    process.stdin : require('fs').createReadStream(__dirname + '/input.txt'),
+  output: process.stdout
+});
+
+let N;
+let graph;
+let dp;
+let visited;
+
+function dfs(cur) {
+  visited[cur] = true;
+
+  for (const child of graph[cur]) {
+    if (!visited[child]) {
+      dfs(child);
+      dp[cur][0] += dp[child][1];
+      dp[cur][1] += Math.min(...dp[child]);
+    }
+  }
+}
+
+rl.question('', input => {
+  N = parseInt(input);
+  graph = Array.from({ length: N + 1 }, () => []);
+  dp = Array.from({ length: N + 1 }, () => [0, 1]);
+  visited = Array(N + 1).fill(false);
+
+  rl.on('line', line => {
+    const [u, v] = line.split(' ').map(Number);
+    graph[u].push(v);
+    graph[v].push(u);
+  }).on('close', () => {
+    dfs(1);
+    console.log(Math.min(...dp[1]));
+
+    process.exit();
+  });
+});