結果
| 問題 |
No.1951 消えたAGCT(2)
|
| コンテスト | |
| ユーザー |
tenten
|
| 提出日時 | 2023-06-29 17:37:40 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 682 ms / 3,000 ms |
| コード長 | 3,543 bytes |
| コンパイル時間 | 2,838 ms |
| コンパイル使用メモリ | 92,240 KB |
| 実行使用メモリ | 56,028 KB |
| 最終ジャッジ日時 | 2024-07-06 08:11:26 |
| 合計ジャッジ時間 | 11,992 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 28 |
ソースコード
import java.io.*;
import java.util.*;
import java.util.stream.*;
public class Main {
public static void main(String[] args) throws Exception {
Scanner sc = new Scanner();
int n = sc.nextInt();
char[] inputs = sc.next().toCharArray();
BinaryIndexedTree bit = new BinaryIndexedTree(n + 1);
for (int i = 1; i <= n; i++) {
bit.add(i, 1);
}
ArrayList<Character> list = new ArrayList<>();
int[] counts = new int[26];
for (char c : inputs) {
counts[c - 'A']++;
}
String agct = "AGCT";
int[] idxes = new int[4];
for (int i = 0; i < 4; i++) {
idxes[i] = agct.charAt(i) - 'A';
}
int ans = 0;
int plus = 0;
while (true) {
int current = 0;
for (int x : idxes) {
current += counts[(x + plus) % 26];
}
if (current == 0) {
break;
}
int left = 0;
int right = n;
while (right - left > 1) {
int m = (left + right) / 2;
if (bit.getSum(m) < current) {
left = m;
} else {
right = m;
}
}
char c = inputs[right - 1];
counts[c - 'A']--;
bit.add(right, -1);
plus += 26 - counts[c - 'A'] % 26;
plus %= 26;
ans++;
}
System.out.println(ans);
}
}
class BinaryIndexedTree {
int size;
int[] tree;
public BinaryIndexedTree(int size) {
this.size = size;
tree = new int[size];
}
public void add(int idx, int value) {
int mask = 1;
while (idx < size) {
if ((idx & mask) != 0) {
tree[idx] += value;
idx += mask;
}
mask <<= 1;
}
}
public int getSum(int from, int to) {
return getSum(to) - getSum(from - 1);
}
public int getSum(int x) {
int mask = 1;
int ans = 0;
while (x > 0) {
if ((x & mask) != 0) {
ans += tree[x];
x -= mask;
}
mask <<= 1;
}
return ans;
}
}
class Utilities {
static String arrayToLineString(Object[] arr) {
return Arrays.stream(arr).map(x -> x.toString()).collect(Collectors.joining("\n"));
}
static String arrayToLineString(int[] arr) {
return String.join("\n", Arrays.stream(arr).mapToObj(String::valueOf).toArray(String[]::new));
}
}
class Scanner {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
StringTokenizer st = new StringTokenizer("");
StringBuilder sb = new StringBuilder();
public Scanner() throws Exception {
}
public int nextInt() throws Exception {
return Integer.parseInt(next());
}
public long nextLong() throws Exception {
return Long.parseLong(next());
}
public double nextDouble() throws Exception {
return Double.parseDouble(next());
}
public int[] nextIntArray() throws Exception {
return Stream.of(br.readLine().split(" ")).mapToInt(Integer::parseInt).toArray();
}
public String next() throws Exception {
while (!st.hasMoreTokens()) {
st = new StringTokenizer(br.readLine());
}
return st.nextToken();
}
}
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