week5 nkim

nkim/week5/K번째수.js

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+function solution(array, commands) {
+  var answer = [];
+
+  commands.forEach(([i, j, k]) => {
+    const slice_arr = array.slice(i - 1, j);
+    slice_arr.sort((a, b) => a - b);
+    answer.push(slice_arr[k - 1]);
+  });
+  return answer;
+}

nkim/week5/모의고사.js

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+function solution(answers) {
+  var answer = [];
+
+  const answer_cnt = [0, 0, 0];
+  const pattern1 = [1, 2, 3, 4, 5]; //5
+  const pattern2 = [2, 1, 2, 3, 2, 4, 2, 5]; //8
+  const pattern3 = [3, 3, 1, 1, 2, 2, 4, 4, 5, 5]; //10
+
+  answers.forEach((answer, idx) => {
+    if (pattern1[idx % pattern1.length] === answer) answer_cnt[0] += 1;
+    if (pattern2[idx % pattern2.length] === answer) answer_cnt[1] += 1;
+    if (pattern3[idx % pattern3.length] === answer) answer_cnt[2] += 1;
+  });
+
+  const max = Math.max(...answer_cnt);
+  let idx = answer_cnt.indexOf(max);
+  let i;
+  while (idx != -1) {
+    answer.push(idx + 1);
+    i = idx + 1;
+    idx = answer_cnt.indexOf(max, i);
+  }
+
+  return answer;
+}

nkim/week5/신고 결과 받기.js

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+function solution(id_list, report, k) {
+  var answer = {};
+  const repoCount = {};
+  const repoSet = {};
+  const repoFilter = new Set();
+  const stopId = new Set();
+
+  id_list.forEach((id) => {
+    answer[id] = 0;
+    repoCount[id] = 0;
+    repoSet[id] = [];
+  });
+  report.forEach((data) => repoFilter.add(data));
+  repoFilter.forEach((repo) => {
+    const [user_id, report_id] = repo.split(" ");
+    repoCount[report_id] += 1;
+    if (repoCount[report_id] >= k) stopId.add(report_id);
+    repoSet[user_id].push(report_id);
+  });
+  Object.entries(repoSet).forEach(([user_id, report_id_list]) => {
+    stopId.forEach((stop_id) => {
+      if (report_id_list.includes(stop_id)) answer[user_id] += 1;
+    });
+  });
+  answer = Object.values(answer);
+
+  return answer;
+}