結果
| 問題 |
No.860 買い物
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2019-08-10 12:30:04 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 180 ms / 1,000 ms |
| コード長 | 3,045 bytes |
| コンパイル時間 | 3,304 ms |
| コンパイル使用メモリ | 78,464 KB |
| 実行使用メモリ | 45,796 KB |
| 最終ジャッジ日時 | 2024-07-19 17:05:55 |
| 合計ジャッジ時間 | 5,069 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge3 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 15 |
ソースコード
import java.io.IOException;
import java.io.InputStream;
import java.util.Arrays;
import java.util.NoSuchElementException;
import java.util.PriorityQueue;
class Main {
public static void main(String[] args) {
new Main().run();
}
void run() {
Scanner sc = new Scanner();
int N = sc.nextInt();
long[] C = new long[N];
long[] D = new long[N];
long ans = 0;
for (int i = 0; i < N; ++i) {
C[i] = sc.nextLong();
D[i] = sc.nextLong();
ans += C[i] + D[i];
}
class Pair implements Comparable<Pair> {
long v;
long min;
public Pair(long v, long min) {
this.v = v;
this.min = min;
}
@Override
public int compareTo(Pair o) {
return -Long.compare(min, o.min);
}
}
PriorityQueue<Pair> pq = new PriorityQueue<>();
long pending = D[0] - C[0];
pq.add(new Pair(D[0], C[0]));
for (int i = 1; i < N; ++i) {
pq.add(new Pair(D[i] + pending, C[i]));
pending = Math.max(pending, D[i] - C[i] + pending);
long max = -Long.MAX_VALUE / 3;
while (!pq.isEmpty() && pq.peek().min >= C[i]) {
Pair p = pq.poll();
max = Math.max(max, p.v);
pending = Math.max(max - C[i], pending);
}
if (max != -Long.MAX_VALUE / 3)
pq.add(new Pair(max, C[i]));
}
System.out.println(ans - pending);
}
// 8+(80+60)+(50+2)+8=208(全部同じ日)
// 8+8+{ 80+(50+2)+50 }=16+130+52=146+52=198(1+(23))
void tr(Object... objects) {
System.out.println(Arrays.deepToString(objects));
}
}
class Scanner {
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 static 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 int nextInt() {
return (int) nextLong();
}
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();
}
}
}