結果
| 問題 |
No.1911 Alternately Coloring
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2022-10-23 16:03:44 |
| 言語 | D (dmd 2.109.1) |
| 結果 |
AC
|
| 実行時間 | 494 ms / 4,000 ms |
| コード長 | 3,719 bytes |
| コンパイル時間 | 1,110 ms |
| コンパイル使用メモリ | 139,760 KB |
| 実行使用メモリ | 6,944 KB |
| 最終ジャッジ日時 | 2024-06-22 16:27:12 |
| 合計ジャッジ時間 | 9,915 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 |
|---|---|
| sample | AC * 2 |
| other | AC * 29 |
ソースコード
import std.conv, std.functional, std.range, std.stdio, std.string;
import std.algorithm, std.array, std.bigint, std.bitmanip, std.complex, std.container, std.math, std.mathspecial, std.numeric, 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; }
bool chmin(T)(ref T t, in T f) { if (t > f) { t = f; return true; } else { return false; } }
bool chmax(T)(ref T t, in T f) { if (t < f) { t = f; return true; } else { return false; } }
int binarySearch(alias pred, T)(in T[] as) { int lo = -1, hi = cast(int)(as.length); for (; lo + 1 < hi; ) { const mid = (lo + hi) >> 1; (unaryFun!pred(as[mid]) ? hi : lo) = mid; } return hi; }
int lowerBound(T)(in T[] as, T val) { return as.binarySearch!(a => (a >= val)); }
int upperBound(T)(in T[] as, T val) { return as.binarySearch!(a => (a > val)); }
int root(int[] uf, int u) {
return (uf[u] < 0) ? u : (uf[u] = uf.root(uf[u]));
}
bool connect(int[] uf, int u, int v) {
u = uf.root(u);
v = uf.root(v);
if (u == v) return false;
if (uf[u] > uf[v]) swap(u, v);
uf[u] += uf[v];
uf[v] = u;
return true;
}
enum INF = 10L^^18;
void main() {
try {
for (; ; ) {
const N = readInt;
const M = readInt;
auto A = new int[M];
auto B = new int[M];
foreach (i; 0 .. M) {
A[i] = readInt - 1;
B[i] = readInt - 1;
}
auto C = new long[][](2, N);
foreach (h; 0 .. 2) foreach (u; 0 .. N) {
C[h][u] = readLong;
}
// bipartite?
{
auto uf = new int[N << 1];
uf[] = -1;
foreach (i; 0 .. M) {
uf.connect(A[i] << 1, B[i] << 1 | 1);
uf.connect(A[i] << 1 | 1, B[i] << 1);
}
if (uf.root(0) != uf.root(1)) {
long ans;
foreach (h; 0 .. 2) {
long score;
foreach (u; 0 .. N) {
score += C[(uf.root(h) == uf.root(u << 1)) ? 1 : 0][u];
}
chmax(ans, score);
}
writeln(ans);
continue;
}
}
auto graph = new int[][N];
foreach (i; 0 .. M) {
graph[A[i]] ~= B[i];
graph[B[i]] ~= A[i];
}
long best;
auto loss = new long[][](2, N);
foreach (u; 0 .. N) {
const mx = max(C[0][u], C[1][u]);
best += mx;
foreach (h; 0 .. 2) {
loss[h][u] = mx - C[h][u];
}
}
long cost = INF;
foreach (src; 0 .. N) {
alias Entry = Tuple!(long, "c", int, "h", int, "u");
BinaryHeap!(Array!Entry, "a.c > b.c") que;
auto dist = new long[][](2, N);
foreach (h; 0 .. 2) {
dist[h][] = INF;
}
que.insert(Entry(dist[0][src] = 0, 0, src));
for (; !que.empty; ) {
const c = que.front.c;
const h = que.front.h;
const u = que.front.u;
que.removeFront;
if (dist[h][u] == c) {
const hh = h ^ 1;
foreach (v; graph[u]) {
if (hh == 1 && src == v) {
chmin(cost, c);
} else {
const cc = c + loss[h][v];
if (chmin(dist[hh][v], cc)) {
que.insert(Entry(cc, hh, v));
}
}
}
}
}
}
writeln(best - cost);
}
} catch (EOFException e) {
}
}