[황장현] 94차 라이브 코테 제출

live9/test93/문제2/황장현.js

@@ -1,42 +1,24 @@
-const alphabetValues = {
-  B: 1,
-  C: 2,
-  D: 3,
-  E: 4,
-  F: 5,
-  G: 6,
-  H: 7,
-  I: 8,
-  J: 9,
-  K: 10,
-  L: 11,
-  M: 13,
-  N: 12,
-  O: 12,
-  P: 11,
-  Q: 10,
-  R: 9,
-  S: 8,
-  T: 7,
-  U: 6,
-  V: 5,
-  W: 4,
-  X: 3,
-  Y: 2,
-  Z: 1,
-};
-
 function solution(name) {
-  let answer = 0;
+  let moveCount = 0;
+  let minMove = name.length - 1;
+
   for (let i = 0; i < name.length; i++) {
-    if (name[i] === 'A') {
-      answer += -1;
-    } else {
-      answer += alphabetValues[name[i]];
+    const char = name[i];
+    moveCount += Math.min(char.charCodeAt(0) - 65, 91 - char.charCodeAt(0));
+
+    let nextIdx = i + 1;
+    while (nextIdx < name.length && name[nextIdx] === 'A') {
+      nextIdx++;
     }
+
+    minMove = Math.min(
+      minMove,
+      i * 2 + (name.length - nextIdx),
+      i + 2 * (name.length - nextIdx)
+    );
   }
-  answer += name.length;
-  return answer;
+
+  return moveCount + minMove;
 }
 
 // console.log(solution('JEROEN'));

live9/test93/문제3/황장현.js

@@ -0,0 +1,26 @@
+function solution(routes) {
+  routes.sort((a, b) => a[1] - b[1]);
+
+  let cameraCount = 0;
+  let lastCameraPos = -30001;
+
+  for (let route of routes) {
+    let [enter, exit] = route;
+
+    if (enter > lastCameraPos) {
+      cameraCount++;
+      lastCameraPos = exit;
+    }
+  }
+
+  return cameraCount;
+}
+
+console.log(
+  solution([
+    [-20, -15],
+    [-14, -5],
+    [-18, -13],
+    [-5, -3],
+  ])
+);

live9/test94/문제1/황장현.js

@@ -0,0 +1,32 @@
+function solution(dirs) {
+  let x = 0;
+  let y = 0;
+
+  const visited = new Set();
+  const directions = {
+    U: [0, 1],
+    D: [0, -1],
+    L: [-1, 0],
+    R: [1, 0],
+  };
+
+  for (let dir of dirs) {
+    const [dx, dy] = directions[dir];
+    let nx = x + dx;
+    let ny = y + dy;
+
+    if (nx < -5 || nx > 5 || ny < -5 || ny > 5) continue;
+
+    const path = `[${x},${y}]->[${nx},${ny}]`;
+
+    visited.add(path);
+
+    x = nx;
+    y = ny;
+  }
+
+  return visited.size;
+}
+
+console.log(solution('ULURRDLLU'));
+// console.log(solution('LULLLLLLU'));

live9/test94/문제2/황장현.js

@@ -0,0 +1,39 @@
+function solution(book_time) {
+  const toMinutes = (time) => {
+    const [hour, minute] = time.split(':').map(Number);
+    return hour * 60 + minute;
+  };
+
+  book_time.sort((a, b) => toMinutes(a[0]) - toMinutes(b[0]));
+
+  const rooms = [];
+
+  for (const [start, end] of book_time) {
+    const startTime = toMinutes(start);
+    const endTime = toMinutes(end) + 10;
+
+    let earliestRoomIndex = rooms.findIndex(
+      (roomEndTime) => roomEndTime <= startTime
+    );
+
+    if (earliestRoomIndex !== -1) {
+      rooms[earliestRoomIndex] = endTime;
+    } else {
+      rooms.push(endTime);
+    }
+
+    rooms.sort((a, b) => a - b);
+  }
+
+  return rooms.length;
+}
+
+console.log(
+  solution([
+    ['15:00', '17:00'],
+    ['16:40', '18:20'],
+    ['14:20', '15:20'],
+    ['14:10', '19:20'],
+    ['18:20', '21:20'],
+  ])
+);

live9/test94/문제3/황장현.js

@@ -0,0 +1,20 @@
+function solution(stones, k) {
+  let min = 1;
+  let max = 200000000;
+
+  while (min <= max) {
+    const mid = Math.floor((min + max) / 2);
+    let cnt = 0;
+    for (let stone of stones) {
+      if (stone - mid <= 0) cnt++;
+      else cnt = 0;
+
+      if (cnt === k) break;
+    }
+    if (cnt === k) max = mid - 1;
+    else min = mid + 1;
+  }
+  return min;
+}
+
+console.log(solution([2, 4, 5, 3, 2, 1, 4, 2, 5, 1], 3));