結果
| 問題 |
No.484 収穫
|
| コンテスト | |
| ユーザー |
tanzaku
|
| 提出日時 | 2017-02-09 23:34:37 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 659 ms / 3,000 ms |
| コード長 | 2,630 bytes |
| コンパイル時間 | 3,419 ms |
| コンパイル使用メモリ | 78,216 KB |
| 実行使用メモリ | 180,188 KB |
| 最終ジャッジ日時 | 2024-10-13 13:07:41 |
| 合計ジャッジ時間 | 12,241 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 21 |
ソースコード
import java.io.*;
import java.util.*;
class InputValidator implements Closeable {
final InputStream in;
final int NO_BUFFER = -2;
int buffer;
public InputValidator(final InputStream in) {
this.in = in;
buffer = NO_BUFFER;
}
int read() throws IOException {
final int res = buffer == NO_BUFFER ? in.read() : buffer;
buffer = NO_BUFFER;
return res;
}
void unread(int ch) throws IOException {
buffer = ch;
}
// [low, high]
long nextLong(long low, long high) throws IOException {
long val = 0;
int ch = -1;
while (true) {
ch = read();
if (!Character.isDigit(ch)) break;
val = val * 10 + ch - '0';
check(val <= high);
}
check(ch >= 0);
check(val >= low);
unread(ch);
return val;
}
int nextInt(int low, int high) throws IOException { return (int)nextLong(low, high); }
int[] nextInts(int n, int low, int high) throws IOException {
int[] res = new int[n];
for (int i = 0; i < n; i++) {
res[i] = nextInt(low, high);
if (i + 1 != n) space();
}
newLineOrEOF();
return res;
}
void space() throws IOException { int ch = read(); check(ch == ' '); }
void newLine() throws IOException {
int ch = read();
if (ch == '\r') ch = read();
check(ch == '\n');
}
void newLineOrEOF() throws IOException { int ch = read(); check(ch == '\r' || ch == '\n' || ch < 0); }
void check(boolean b) { if (!b) throw new RuntimeException(); }
@Override
public void close() throws IOException {
}
}
public class _483_Validate {
public static void main(String[] args) throws IOException {
new _483_Validate().solve();
}
void solve() throws IOException {
try (final InputValidator in = new InputValidator(System.in)) {
// try (final Scanner in = new Scanner(System.in)) {
int n = in.nextInt(1, 2000);
in.newLine();
A = in.nextInts(n, 0, 1_000_000_000);
memo = new int[n][n][2];
for (int[][] me : memo) for (int[] mo : me) Arrays.fill(mo, -1);
int ans = INF;
for (int i = 0; i < n; i++) {
ans = Math.min(ans, rec(i, i, 0));
}
System.out.println(ans);
}
}
int[] A;
final int INF = 1<<30;
int[][][] memo;
int rec(int l, int r, int lr) {
if (l < 0) return INF;
if (r >= A.length) return INF;
if (r - l + 1 == A.length) return A[lr == 0 ? l : r];
if (memo[l][r][lr] != -1) return memo[l][r][lr];
final int x = lr == 0 ? l : r;
int ans = INF;
ans = Math.min(ans, (rec(l - 1, r, 0) + x - l + 1));
ans = Math.min(ans, (rec(l, r + 1, 1) + r - x + 1));
ans = Math.max(A[x], ans);
return memo[l][r][lr] = ans;
}
// for debug
static void dump(Object... o) {
System.err.println(Arrays.deepToString(o));
}
}
tanzaku