結果
問題 | No.346 チワワ数え上げ問題 |
ユーザー | CrazyBBB |
提出日時 | 2016-03-06 15:26:54 |
言語 | Java21 (openjdk 21) |
結果 |
AC
|
実行時間 | 93 ms / 2,000 ms |
コード長 | 3,160 bytes |
コンパイル時間 | 1,994 ms |
コンパイル使用メモリ | 77,476 KB |
実行使用メモリ | 51,208 KB |
最終ジャッジ日時 | 2024-09-24 14:46:26 |
合計ジャッジ時間 | 4,599 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
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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 | 50 ms
49,984 KB |
testcase_01 | AC | 49 ms
49,660 KB |
testcase_02 | AC | 49 ms
49,820 KB |
testcase_03 | AC | 49 ms
49,984 KB |
testcase_04 | AC | 51 ms
50,144 KB |
testcase_05 | AC | 49 ms
50,052 KB |
testcase_06 | AC | 49 ms
49,988 KB |
testcase_07 | AC | 50 ms
50,020 KB |
testcase_08 | AC | 50 ms
50,176 KB |
testcase_09 | AC | 49 ms
50,024 KB |
testcase_10 | AC | 89 ms
50,912 KB |
testcase_11 | AC | 81 ms
50,492 KB |
testcase_12 | AC | 89 ms
51,036 KB |
testcase_13 | AC | 82 ms
50,552 KB |
testcase_14 | AC | 52 ms
49,740 KB |
testcase_15 | AC | 88 ms
50,964 KB |
testcase_16 | AC | 92 ms
50,804 KB |
testcase_17 | AC | 89 ms
51,120 KB |
testcase_18 | AC | 91 ms
51,208 KB |
testcase_19 | AC | 93 ms
51,076 KB |
testcase_20 | AC | 81 ms
50,784 KB |
testcase_21 | AC | 90 ms
50,960 KB |
testcase_22 | AC | 92 ms
51,128 KB |
testcase_23 | AC | 48 ms
49,764 KB |
testcase_24 | AC | 48 ms
49,972 KB |
testcase_25 | AC | 47 ms
49,604 KB |
ソースコード
import java.io.IOException; import java.io.InputStream; import java.util.NoSuchElementException; public class Main { public static void main(String[] args) { FastScanner sc = new FastScanner(); String str = sc.next(); int wcnt = 0; long ans = 0; for (int i=str.length()-1; i>=0; i--) { if (str.charAt(i) == 'w') { wcnt++; } else if (str.charAt(i) == 'c') { ans += (long)wcnt * (wcnt-1) / 2; } } System.out.println(ans); } } /////////////////////////////////////////////////////// class FastScanner { private final InputStream in = System.in; private final byte[] buffer = new byte[1024]; private int ptr = 0; private int buflen = 0; private boolean hasNextByte() { if (ptr < buflen) { return true; }else{ ptr = 0; try { buflen = in.read(buffer); } catch (IOException e) { e.printStackTrace(); } if (buflen <= 0) { return false; } } return true; } private int readByte() { if (hasNextByte()) return buffer[ptr++]; else return -1;} private boolean isPrintableChar(int c) { return 33 <= c && c <= 126;} private void skipUnprintable() { while(hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++;} public boolean hasNext() { skipUnprintable(); return hasNextByte();} public String next() { if (!hasNext()) throw new NoSuchElementException(); StringBuilder sb = new StringBuilder(); int b = readByte(); while(isPrintableChar(b)) { sb.appendCodePoint(b); b = readByte(); } return sb.toString(); } public long nextLong() { if (!hasNext()) throw new NoSuchElementException(); long n = 0; boolean minus = false; int b = readByte(); if (b == '-') { minus = true; b = readByte(); } if (b < '0' || '9' < b) { throw new NumberFormatException(); } while(true){ if ('0' <= b && b <= '9') { n *= 10; n += b - '0'; }else if(b == -1 || !isPrintableChar(b)){ return minus ? -n : n; }else{ throw new NumberFormatException(); } b = readByte(); } } public int nextInt() { if (!hasNext()) throw new NoSuchElementException(); int n = 0; boolean minus = false; int b = readByte(); if (b == '-') { minus = true; b = readByte(); } if (b < '0' || '9' < b) { throw new NumberFormatException(); } while(true){ if ('0' <= b && b <= '9') { n *= 10; n += b - '0'; }else if(b == -1 || !isPrintableChar(b)){ return minus ? -n : n; }else{ throw new NumberFormatException(); } b = readByte(); } } }