結果
| 問題 | No.789 範囲の合計 |
| コンテスト | |
| ユーザー |
tenten
|
| 提出日時 | 2022-08-24 09:41:14 |
| 言語 | Java (openjdk 25.0.1) |
| 結果 |
AC
|
| 実行時間 | 903 ms / 1,000 ms |
| コード長 | 2,698 bytes |
| 記録 | |
| コンパイル時間 | 2,606 ms |
| コンパイル使用メモリ | 79,272 KB |
| 実行使用メモリ | 62,272 KB |
| 最終ジャッジ日時 | 2024-10-11 19:45:23 |
| 合計ジャッジ時間 | 11,125 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 15 |
ソースコード
import java.io.*;
import java.util.*;
public class Main {
public static void main(String[] args) throws Exception {
Scanner sc = new Scanner();
int n = sc.nextInt();
boolean[] isAdds = new boolean[n];
int[] lefts = new int[n];
int[] rights = new int[n];
TreeMap<Integer, Integer> compress = new TreeMap<>();
for (int i = 0; i < n; i++) {
isAdds[i] = (sc.nextInt() == 0);
lefts[i] = sc.nextInt();
rights[i] = sc.nextInt();
if (isAdds[i]) {
compress.put(lefts[i], null);
} else {
compress.put(lefts[i], null);
compress.put(rights[i], null);
}
}
int idx = 1;
for (int x : compress.keySet()) {
compress.put(x, idx++);
}
BinaryIndexedTree bit = new BinaryIndexedTree(idx);
long ans = 0;
for (int i = 0; i < n; i++) {
if (isAdds[i]) {
bit.add(compress.get(lefts[i]), rights[i]);
} else {
ans += bit.getSum(compress.get(lefts[i]), compress.get(rights[i]));
}
}
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 Scanner {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
StringTokenizer st = new StringTokenizer("");
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 String next() throws Exception {
while (!st.hasMoreTokens()) {
st = new StringTokenizer(br.readLine());
}
return st.nextToken();
}
}
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