結果
| 問題 |
No.704 ゴミ拾い Medium
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2019-01-23 15:47:59 |
| 言語 | D (dmd 2.109.1) |
| 結果 |
AC
|
| 実行時間 | 338 ms / 1,500 ms |
| コード長 | 3,316 bytes |
| コンパイル時間 | 1,203 ms |
| コンパイル使用メモリ | 126,224 KB |
| 実行使用メモリ | 33,452 KB |
| 最終ジャッジ日時 | 2024-06-13 03:32:39 |
| 合計ジャッジ時間 | 10,342 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 44 |
ソースコード
import std.conv, std.stdio, std.string;
import std.algorithm, std.array, std.bigint, std.container, std.math, std.numeric, std.range, std.regex, std.typecons;
import core.bitop;
class EOFException : Throwable { this() { super("EOF"); } }
string[] tokens;
string readToken() { for (; tokens.empty; ) { if (stdin.eof) { throw new EOFException; } tokens = readln.split; } auto token = tokens.front; tokens.popFront; return token; }
int readInt() { return readToken.to!int; }
long readLong() { return readToken.to!long; }
real readReal() { return readToken.to!real; }
void chmin(T)(ref T t, in T f) { if (t > f) t = f; }
void chmax(T)(ref T t, in T f) { if (t < f) t = f; }
int binarySearch(T)(in T[] as, in bool delegate(T) test) { int low = -1, upp = cast(int)(as.length); for (; low + 1 < upp; ) { int mid = (low + upp) >> 1; (test(as[mid]) ? low : upp) = mid; } return upp; }
int lowerBound(T)(in T[] as, in T val) { return as.binarySearch((T a) => (a < val)); }
int upperBound(T)(in T[] as, in T val) { return as.binarySearch((T a) => (a <= val)); }
enum INF = 10L^^18;
class SegmentTree {
int n;
long[] mn;
this(int n_) {
for (n = 1; n < n_; n <<= 1) {}
mn = new long[n << 1];
mn[] = INF;
}
void update(int a, long val) {
chmin(mn[a += n], val);
for (a >>= 1; a; a >>= 1) {
mn[a] = min(mn[a << 1], mn[a << 1 | 1]);
}
}
long rangeMin(int a, int b) {
long ret = INF;
for (a += n, b += n; a <= b; a >>= 1, b >>= 1) {
if ( a & 1) chmin(ret, mn[a++]);
if (~b & 1) chmin(ret, mn[b--]);
}
return ret;
}
}
int N;
long[] A, X, Y;
void main() {
try {
for (; ; ) {
N = readInt();
A = new long[N];
foreach (i; 0 .. N) {
A[i] = readLong();
}
X = new long[N];
foreach (i; 0 .. N) {
X[i] = readLong();
}
Y = new long[N];
foreach (i; 0 .. N) {
Y[i] = readLong();
}
debug {
auto dp = new long[N];
foreach (i; 0 .. N) {
dp[i] = abs(X[0] - A[i]) + abs(Y[0] - 0);
foreach (j; 1 .. i + 1) {
chmin(dp[i], dp[j - 1] + abs(X[j] - A[i]) + abs(Y[j] - 0));
}
}
writeln(dp);
}
/*
dp[i] = min{ dp[j - 1] + |X[j] - A[i]| + |Y[j] - 0| | 0 <= j <= i }
= min{
min{ dp[j - 1] - X[j] + |Y[j]| | X[j] < A[i] } + A[i],
min{ dp[j - 1] + X[j] + |Y[j]| | X[j] >= A[i] } - A[i]
}
*/
const xs = X.dup.sort.uniq.array;
const xsLen = cast(int)(xs.length);
auto segL = new SegmentTree(xsLen);
auto segR = new SegmentTree(xsLen);
long ans;
foreach (i; -1 .. N) {
long z;
if (i == -1) {
z = 0;
} else {
z = min(
segL.rangeMin(0, xs.lowerBound(A[i]) - 1) + A[i],
segR.rangeMin(xs.lowerBound(A[i]), xsLen - 1) - A[i]
);
}
debug {
writeln(i, " ", z);
}
if (i == N - 1) {
ans = z;
} else {
const pos = xs.lowerBound(X[i + 1]);
segL.update(pos, z - X[i + 1] + abs(Y[i + 1]));
segR.update(pos, z + X[i + 1] + abs(Y[i + 1]));
}
}
writeln(ans);
}
} catch (EOFException e) {
}
}