結果
| 問題 |
No.8071 玉虫色着色
|
| ユーザー |
|
| 提出日時 | 2020-07-28 23:27:04 |
| 言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 20 ms / 2,000 ms |
| コード長 | 3,571 bytes |
| コンパイル時間 | 1,287 ms |
| コンパイル使用メモリ | 104,708 KB |
| 実行使用メモリ | 5,376 KB |
| 最終ジャッジ日時 | 2024-06-28 21:06:59 |
| 合計ジャッジ時間 | 11,599 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 14 |
ソースコード
#include <cassert>
#include <cmath>
#include <cstdint>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <algorithm>
#include <bitset>
#include <complex>
#include <deque>
#include <functional>
#include <iostream>
#include <map>
#include <numeric>
#include <queue>
#include <set>
#include <sstream>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <vector>
using namespace std;
using Int = long long;
template <class T1, class T2> ostream &operator<<(ostream &os, const pair<T1, T2> &a) { return os << "(" << a.first << ", " << a.second << ")"; };
template <class T> void pv(T a, T b) { for (T i = a; i != b; ++i) cerr << *i << " "; cerr << endl; }
template <class T> bool chmin(T &t, const T &f) { if (t > f) { t = f; return true; } return false; }
template <class T> bool chmax(T &t, const T &f) { if (t < f) { t = f; return true; } return false; }
namespace MF {
const int LIM_N = 200010;
const int LIM_M = 200010;
typedef int wint;
const wint wEPS = 0;
const wint wINF = 1001001001;
int n, m, ptr[LIM_N], nxt[LIM_M * 2], zu[LIM_M * 2];
wint capa[LIM_M * 2], tof;
int lev[LIM_N], see[LIM_N], que[LIM_N], *qb, *qe;
void init(int _n) {
n = _n; m = 0; fill(ptr, ptr + n, -1);
}
void ae(int u, int v, wint w0, wint w1 = 0) {
nxt[m] = ptr[u]; ptr[u] = m; zu[m] = v; capa[m] = w0; ++m;
nxt[m] = ptr[v]; ptr[v] = m; zu[m] = u; capa[m] = w1; ++m;
}
wint augment(int src, int ink, wint flo) {
if (src == ink) return flo;
for (int &i = see[src]; ~i; i = nxt[i]) if (capa[i] > wEPS && lev[src] < lev[zu[i]]) {
const wint f = augment(zu[i], ink, min(flo, capa[i]));
if (f > wEPS) {
capa[i] -= f; capa[i ^ 1] += f; return f;
}
}
return 0;
}
bool solve(int src, int ink, wint flo = wINF) {
for (tof = 0; tof + wEPS < flo; ) {
qb = qe = que; fill(lev, lev + n, -1);
for (lev[*qe++ = src] = 0, see[src] = ptr[src]; qb != qe; ) {
const int u = *qb++;
for (int i = ptr[u]; ~i; i = nxt[i]) if (capa[i] > wEPS) {
const int v = zu[i];
if (lev[v] == -1) {
lev[*qe++ = v] = lev[u] + 1; see[v] = ptr[v];
if (v == ink) goto au;
}
}
}
return false;
au: for (wint f; (f = augment(src, ink, flo - tof)) > wEPS; tof += f);
}
return true;
}
}
int L, R, M;
vector<int> A, B;
int main() {
for (; ~scanf("%d%d%d", &L, &R, &M); ) {
A.resize(M);
B.resize(M);
for (int i = 0; i < M; ++i) {
scanf("%d%d", &A[i], &B[i]);
B[i] += L;
}
int color;
vector<int> ans(M, -1);
for (color = 0; ; ++color) {
vector<int> deg(L + R, 0);
for (int i = 0; i < M; ++i) {
if (ans[i] == -1) {
++deg[A[i]];
++deg[B[i]];
}
}
const int minDeg = *min_element(deg.begin(), deg.end());
if (minDeg == 0) {
break;
}
MF::init(L + R + 2);
vector<int> ids(M, -1);
for (int u = 0; u < L; ++u) {
MF::ae(L + R + 0, u, deg[u] - minDeg + 1);
}
for (int v = L; v < L + R; ++v) {
MF::ae(v, L + R + 1, deg[v] - minDeg + 1);
}
for (int i = 0; i < M; ++i) {
if (ans[i] == -1) {
ids[i] = MF::m;
MF::ae(A[i], B[i], 1);
}
}
MF::solve(L + R + 0, L + R + 1);
for (int i = 0; i < M; ++i) {
if (ans[i] == -1) {
if (MF::capa[ids[i]] == 0) {
ans[i] = color;
}
}
}
}
printf("%d\n", color);
for (int i = 0; i < M; ++i) {
printf("%d\n", ans[i]);
}
}
return 0;
}