結果
問題 | No.1765 While Shining |
ユーザー | nishi5451 |
提出日時 | 2021-12-09 22:18:58 |
言語 | Java21 (openjdk 21) |
結果 |
AC
|
実行時間 | 108 ms / 2,000 ms |
コード長 | 2,670 bytes |
コンパイル時間 | 3,640 ms |
コンパイル使用メモリ | 74,876 KB |
実行使用メモリ | 53,280 KB |
最終ジャッジ日時 | 2023-09-24 14:24:42 |
合計ジャッジ時間 | 5,989 ms |
ジャッジサーバーID (参考情報) |
judge15 / judge14 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 43 ms
47,460 KB |
testcase_01 | AC | 44 ms
49,476 KB |
testcase_02 | AC | 44 ms
49,324 KB |
testcase_03 | AC | 44 ms
49,772 KB |
testcase_04 | AC | 45 ms
49,488 KB |
testcase_05 | AC | 46 ms
49,588 KB |
testcase_06 | AC | 45 ms
49,652 KB |
testcase_07 | AC | 45 ms
49,492 KB |
testcase_08 | AC | 46 ms
49,352 KB |
testcase_09 | AC | 86 ms
52,300 KB |
testcase_10 | AC | 102 ms
53,280 KB |
testcase_11 | AC | 100 ms
52,756 KB |
testcase_12 | AC | 106 ms
52,748 KB |
testcase_13 | AC | 97 ms
52,700 KB |
testcase_14 | AC | 106 ms
52,556 KB |
testcase_15 | AC | 101 ms
52,672 KB |
testcase_16 | AC | 106 ms
52,948 KB |
testcase_17 | AC | 98 ms
52,584 KB |
testcase_18 | AC | 108 ms
52,528 KB |
testcase_19 | AC | 105 ms
53,068 KB |
testcase_20 | AC | 105 ms
52,960 KB |
testcase_21 | AC | 107 ms
52,568 KB |
testcase_22 | AC | 108 ms
52,780 KB |
testcase_23 | AC | 105 ms
52,648 KB |
testcase_24 | AC | 101 ms
52,760 KB |
ソースコード
import java.util.*; import java.util.stream.*; import java.io.*; public class Main { static final int INF = 1<<30; static final long INFL = 1L<<60; static final int MOD = 1000000007; static final int MOD2 = 998244353; static List<List<Integer>> g; public static void main(String[] args) { FastScanner fs = new FastScanner(); PrintWriter pw = new PrintWriter(System.out); int n = fs.nextInt(); int[] a = fs.nextInts(n); int[] cnt = new int[n]; int now = 0; for(int i = n-2; i >= 0; i--){ if(a[i+1] != a[i]) now++; else now = 1; cnt[i] = now; } long ans = 0; for(int i = 0; i < n; i++){ if(a[i] == 1) ans += cnt[i]; } pw.println(ans); pw.close(); } } class FastScanner { private InputStream in = System.in; private byte[] buffer = new byte[1024]; private int length = 0, p = 0; private boolean hasNextByte() { if (p < length) return true; else{ p = 0; try{ length = in.read(buffer); }catch(Exception e){ e.printStackTrace(); } if(length == 0) return false; } return true; } private int readByte() { if (hasNextByte() == true) return buffer[p++]; return -1; } private static boolean isPrintable(int n) { return 33 <= n && n <= 126; } private void skip() { while (hasNextByte() && !isPrintable(buffer[p])) p++; } public boolean hasNext() { skip(); return hasNextByte(); } public String next() { if(!hasNext()) throw new NoSuchElementException(); StringBuilder sb = new StringBuilder(); int temp = readByte(); while (isPrintable(temp)) { sb.appendCodePoint(temp); temp = readByte(); } return sb.toString(); } public int nextInt() { return Math.toIntExact(nextLong()); } public int[] nextInts(int n) { int[] ar = new int[n]; for (int i = 0; i < n; i++) ar[i] = nextInt(); return ar; } public long[] nextLongs(int n) { long[] ar = new long[n]; for (int i = 0; i < n; i++) ar[i] = nextLong(); return ar; } public long nextLong() { if(!hasNext()) throw new NoSuchElementException(); boolean minus = false; int temp = readByte(); if (temp == '-') { minus = true; temp = readByte(); } if (temp < '0' || '9' < temp) throw new NumberFormatException(); long n = 0; while (isPrintable(temp)) { if ('0' <= temp && temp <= '9') { n *= 10; n += temp - '0'; } temp = readByte(); } return minus ? -n : n; } public char[] nextChars() { String s = next(); return s.toCharArray(); } public char[][] nextCharMat(int h, int w) { char[][] ar = new char[h][w]; for(int i = 0; i < h; i++){ String s = next(); for(int j = 0; j < w; j++){ ar[i][j] = s.charAt(j); } } return ar; } }