7/1 3Q

.gitignore

@@ -1,2 +1,2 @@
 .DS_Store
-
+Jiho/input.txt

Jiho/Day1/백준10816.js

@@ -0,0 +1,29 @@
+const fs = require("fs");
+const input = fs
+  .readFileSync(process.platform === "linux" ? "/dev/stdin" : "./input.txt")
+  .toString()
+  .trim()
+  .split("\n");
+
+const [N, cardstr, M, arrstr] = input;
+const cards = cardstr.split(" ").map(Number);
+const arr = arrstr.split(" ").map(Number);
+
+function solution(N, cards, M, arr) {
+  // #1. 집합 만들기
+  const card_set = new Set();
+  for (const card of cards) {
+    card_set.add(card);
+  }
+  let res = "";
+  for (const num of arr) {
+    if (card_set.has(num)) {
+      res += "1 ";
+    } else {
+      res += "0 ";
+    }
+  }
+  return res;
+}
+
+console.log(solution(parseInt(N), cards, parseInt(M), arr));

Jiho/Day1/백준1475.js

@@ -0,0 +1,30 @@
+const fs = require("fs");
+const input = fs
+  .readFileSync(process.platform === "linux" ? "/dev/stdin" : "../input.txt")
+  .toString()
+  .trim();
+
+/*--------------------------------------------------------------------------------
+  #1 1475번
+*/
+function solution(val) {
+  const arr = val.toString().split("");
+  const cnt_arr = Array(10).fill(0);
+  const cnt_arr69 = Array(2).fill(0);
+  let i;
+  for (i = 0; i < arr.length; i++) {
+    const val = parseInt(arr[i]);
+    if (val == 6) {
+      cnt_arr69[0] += 1;
+    } else if (val == 9) {
+      cnt_arr69[1] += 1;
+    } else {
+      cnt_arr[val] += 1;
+    }
+  }
+
+  const res = [...cnt_arr, Math.ceil((cnt_arr69[0] + cnt_arr69[1]) / 2)];
+  return Math.max(...res);
+}
+
+console.log(solution(parseInt(input)));

Jiho/Day1/백준7785.js

@@ -0,0 +1,32 @@
+const fs = require("fs");
+const input = fs
+  .readFileSync(process.platform === "linux" ? "/dev/stdin" : "./input.txt")
+  .toString()
+  .trim()
+  .split("\n");
+
+const [N, ...arr] = input;
+function solution(N, arr) {
+  const emp_set = new Set();
+  for (const rec of arr) {
+    const [name, command] = rec.trim().split(" ");
+    // #1. enter인 경우
+    if (command === "enter") {
+      emp_set.add(name);
+    }
+    // #2. leave인 경우
+    else if (command === "leave") {
+      if (emp_set.has(name)) {
+        emp_set.delete(name);
+      }
+    }
+  }
+  const emp_arr = [...emp_set];
+  // const sorted_arr = emp_arr.sort().reverse();
+  const sorted_arr = emp_arr.sort((a, b) => a.localeCompare(b));
+  for (const name of sorted_arr) {
+    console.log(name);
+  }
+}
+
+solution(parseInt(N), arr);