結果
| 問題 |
No.119 旅行のツアーの問題
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2015-02-18 05:52:58 |
| 言語 | D (dmd 2.109.1) |
| 結果 |
AC
|
| 実行時間 | 3 ms / 5,000 ms |
| コード長 | 3,749 bytes |
| コンパイル時間 | 1,013 ms |
| コンパイル使用メモリ | 124,544 KB |
| 実行使用メモリ | 5,376 KB |
| 最終ジャッジ日時 | 2024-06-12 02:23:26 |
| 合計ジャッジ時間 | 1,790 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 19 |
ソースコード
import core.thread;
import std.conv, std.stdio, std.string;
import std.algorithm, std.array, std.bigint, std.container, std.math, std.range, std.regex;
// Input
class EOFException : Throwable { this() { super("EOF"); } }
string[] tokens;
string readToken() { for (; tokens.empty; ) { tokens = readln.split; if (tokens.empty && stdin.eof) throw new EOFException; } auto token = tokens[0]; tokens.popFront; return token; }
int readInt() { return to!int(readToken); }
long readLong() { return to!long(readToken); }
real readReal() { return to!real(readToken); }
// chmin/chmax
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; }
// Pair
struct Pair(S, T) {
S x; T y;
int opCmp( const Pair p) const { return (x < p.x) ? -1 : (x > p.x) ? +1 : (y < p.y) ? -1 : (y > p.y) ? +1 : 0; }
int opCmp(ref const Pair p) const { return (x < p.x) ? -1 : (x > p.x) ? +1 : (y < p.y) ? -1 : (y > p.y) ? +1 : 0; }
string toString() const { return "(" ~ to!string(x) ~ ", " ~ to!string(y) ~ ")"; }
}
auto pair(S, T)(inout(S) x, inout(T) y) { return Pair!(S, T)(x, y); }
// Array
int binarySearch(T)(in T[] as, in bool delegate(T) test) { int low = -1, upp = 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) { return (a < val); }); }
int upperBound(T)(in T[] as, in T val) { return as.binarySearch((T a) { return (a <= val); }); }
T[] unique(T)(in T[] as) { T[] bs; foreach (a; as) if (bs.empty || bs[$ - 1] != a) bs ~= a; return bs; }
class MaxFlow(CAPA) {
static immutable CAPA wEPS = 0;
static immutable CAPA wINF = 1001001001;
int n, m;
int[][] g;
int[] zu;
CAPA[] capa;
CAPA tof;
int[] lev, see, que;
this (int n) {
this.n = n; m = 0; g = new int[][n]; zu = null; capa = null;
lev = new int[n]; see = new int[n]; que = new int[n];
}
void ae(int u, int v, CAPA w0, CAPA w1 = 0) {
g[u] ~= m; zu ~= v; capa ~= w0; ++m;
g[v] ~= m; zu ~= u; capa ~= w1; ++m;
}
CAPA augment(int src, int ink, CAPA flo) {
if (src == ink) return flo;
foreach (i; g[src][see[src] .. $]) {
if (capa[i] > wEPS && lev[src] < lev[zu[i]]) {
CAPA f = augment(zu[i], ink, min(flo, capa[i]));
if (f > wEPS) {
capa[i] -= f; capa[i ^ 1] += f; return f;
}
}
++see[src];
}
return 0;
}
bool dinic(int src, int ink, CAPA flo = wINF) {
for (tof = 0; tof + wEPS < flo; ) {
int[] q;
lev[] = -1;
dinicBFS:
for (lev[src] = 0, q ~= src; !q.empty; ) {
int u = q.front; q.popFront;
foreach (i; g[u]) {
int v = zu[i];
if (capa[i] > wEPS && lev[v] == -1) {
lev[v] = lev[u] + 1; q ~= v;
if (v == ink) break dinicBFS;
}
}
}
if (lev[ink] == -1) return false;
see[] = 0;
for (; ; ) {
CAPA f = augment(src, ink, flo - tof);
if (f <= wEPS) break;
tof += f;
}
}
return true;
}
}
int N;
int[] B, C;
int M;
int[] D, E;
void main(string[] args) {
try {
for (; ; ) {
N = readInt;
B = new int[N];
C = new int[N];
foreach (u; 0 .. N) {
B[u] = readInt;
C[u] = readInt;
}
M = readInt;
D = new int[M];
E = new int[M];
foreach (i; 0 .. M) {
D[i] = readInt;
E[i] = readInt;
}
int ans;
ans += B.reduce!((a, b) => a + b);
ans += C.reduce!((a, b) => a + b);
auto mf = new MaxFlow!(int)(2 + N * 2);
int L(int u) { return 2 + u * 2 + 0; }
int R(int u) { return 2 + u * 2 + 1; }
foreach (u; 0 .. N) {
mf.ae(0, L(u), B[u]);
mf.ae(L(u), R(u), mf.wINF);
mf.ae(R(u), 1, C[u]);
}
foreach (i; 0 .. M) {
mf.ae(L(D[i]), R(E[i]), mf.wINF);
}
mf.dinic(0, 1);
ans -= mf.tof;
writeln(ans);
}
} catch (EOFException) {}
}