week 38 - 40 문제풀이 완료!

sujin/level0/69. 직각삼각형 출력하기.js

@@ -0,0 +1,18 @@
+const readline = require("readline");
+const rl = readline.createInterface({
+  input: process.stdin,
+  output: process.stdout,
+});
+
+let input = [];
+
+rl.on("line", function (line) {
+  input = line.split(" ");
+}).on("close", function () {
+  const N = Number(input[0]);
+  let answer = "";
+  for (let i = 1; i <= N; i++) {
+    answer += "*";
+    console.log(answer);
+  }
+});

sujin/level0/70. 문자열 정렬하기(2).js

@@ -0,0 +1,3 @@
+function solution(my_string) {
+  return my_string.toLowerCase().split("").sort().join("");
+}

sujin/level0/71. 접두사인지 확인하기.js

@@ -0,0 +1,9 @@
+function solution(my_string, is_prefix) {
+  const prefix = [];
+  let element = "";
+  for (let i of my_string) {
+    element += i;
+    prefix.push(element);
+  }
+  return prefix.includes(is_prefix) ? 1 : 0;
+}

sujin/level0/72. 글자 이어붙여 문자열 만들기.js

@@ -0,0 +1,3 @@
+function solution(my_string, index_list) {
+  return index_list.map((item, idx) => my_string[item]).join("");
+}

sujin/level0/73, 문자열 곱하기.js

@@ -0,0 +1,3 @@
+function solution(my_string, k) {
+  return my_string.repeat(k);
+}

sujin/level0/74. 원소들의 곱과 합.js

@@ -0,0 +1,5 @@
+function solution(num_list) {
+  const plus = num_list.reduce((acc, cur) => acc + cur, 0) ** 2;
+  const multiple = num_list.reduce((acc, cur) => acc * cur);
+  return multiple < plus ? 1 : 0;
+}

sujin/level1/12. 두 정수 사이의 합.js

@@ -0,0 +1,9 @@
+function solution(a, b) {
+  const NUM_ARR = [a, b].sort((a, b) => a - b);
+  let answer = NUM_ARR[0];
+  if (a === b) return a;
+  for (let i = NUM_ARR[0] + 1; i <= NUM_ARR[1]; ++i) {
+    answer += i;
+  }
+  return answer;
+}

sujin/level1/13. 문자열 내 p와 y의 개수.js

@@ -0,0 +1,12 @@
+function solution(s) {
+  const lowerCase = s.toLowerCase();
+  const compare = { p: 0, y: 0 };
+  for (let i of lowerCase) {
+    if (i === "p") {
+      compare.p += 1;
+    } else if (i === "y") {
+      compare.y += 1;
+    }
+  }
+  return compare.p === compare.y;
+}

sujin/level1/14. 음양 더하기.js

@@ -0,0 +1,7 @@
+function solution(absolutes, signs) {
+  let answer = 0;
+  signs.forEach((item, idx) => {
+    item ? (answer += absolutes[idx]) : (answer += -absolutes[idx]);
+  });
+  return answer;
+}