제출 #172272

#제출 시각아이디문제언어결과실행 시간메모리
172272ijxjdjdArranging Shoes (IOI19_shoes)Java
컴파일 에러
0 ms0 KiB
public class shoes { static long count_swaps(int[] S) { int N = S.length/2; ArrayDeque<Integer>[] left = new ArrayDeque[N]; ArrayDeque<Integer>[] right = new ArrayDeque[N]; for (int i = 0; i < N; i++) { left[i] = new ArrayDeque<>(); right[i] = new ArrayDeque<>(); } FenwickTree unset = new FenwickTree(2 * N); for (int i = 0; i < 2 * N; i++) { int a = S[i]; if (a < 0) { left[(-a) - 1].add(i); } else { right[a - 1].add(i); } unset.add(i, 1); } long res = 0; PriorityQueue<int[]> next = new PriorityQueue<>(new Comparator<int[]>() { public int compare(int[] ints, int[] t1) { return Integer.compare(ints[0] + ints[1] + (ints[0] > ints[1] ? 1 : 0), t1[0] + t1[1] + (t1[0] > t1[1] ? 1 : 0)); } }); for (int i = 0; i < N; i++) { if (left[i].size() > 0) { next.add(new int[]{left[i].remove(), right[i].remove(), i}); } } for (int i = 0; i < N; i++) { int[] a = next.remove(); res += (unset.sum(a[0]) - 1); unset.add(a[0], -1); res += (unset.sum(a[1]) - 1); unset.add(a[1], -1); if (left[a[2]].size() > 0) { next.add(new int[]{left[a[2]].remove(), right[a[2]].remove(), a[2]}); } } return res; } static class FenwickTree { public int[] BIT; public int size = 0; public FenwickTree(int N) { BIT = new int[N]; size = N; } public FenwickTree(int[] arr) { size = arr.length; BIT = new int[arr.length]; for (int i = 0; i < size; i++) { add(i, arr[i]); } } public void add(int id, int add) { for (int i = id; i < size; i |= i + 1) { BIT[i] += add; } } public int sum(int r) { if (r < 0 || r >= size) { return 0; } int res = 0; for (int i = r; i >= 0; i = ((i) & (i + 1)) - 1) { res += BIT[i]; } return res; } } }

컴파일 시 표준 에러 (stderr) 메시지

shoes.java:4: error: cannot find symbol
        ArrayDeque<Integer>[] left = new ArrayDeque[N];
        ^
  symbol:   class ArrayDeque
  location: class shoes
shoes.java:4: error: cannot find symbol
        ArrayDeque<Integer>[] left = new ArrayDeque[N];
                                         ^
  symbol:   class ArrayDeque
  location: class shoes
shoes.java:5: error: cannot find symbol
        ArrayDeque<Integer>[] right = new ArrayDeque[N];
        ^
  symbol:   class ArrayDeque
  location: class shoes
shoes.java:5: error: cannot find symbol
        ArrayDeque<Integer>[] right = new ArrayDeque[N];
                                          ^
  symbol:   class ArrayDeque
  location: class shoes
shoes.java:7: error: cannot find symbol
            left[i] = new ArrayDeque<>();
                          ^
  symbol:   class ArrayDeque
  location: class shoes
shoes.java:8: error: cannot find symbol
            right[i] = new ArrayDeque<>();
                           ^
  symbol:   class ArrayDeque
  location: class shoes
shoes.java:21: error: cannot find symbol
        PriorityQueue<int[]> next = new PriorityQueue<>(new Comparator<int[]>() {
        ^
  symbol:   class PriorityQueue
  location: class shoes
shoes.java:21: error: cannot find symbol
        PriorityQueue<int[]> next = new PriorityQueue<>(new Comparator<int[]>() {
                                        ^
  symbol:   class PriorityQueue
  location: class shoes
shoes.java:21: error: cannot find symbol
        PriorityQueue<int[]> next = new PriorityQueue<>(new Comparator<int[]>() {
                                                            ^
  symbol:   class Comparator
  location: class shoes
9 errors