結果
| 問題 | No.957 植林 |
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2021-02-28 19:09:10 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.89.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 4,827 bytes |
| 記録 | |
| コンパイル時間 | 1,663 ms |
| コンパイル使用メモリ | 148,620 KB |
| 最終ジャッジ日時 | 2025-01-19 08:15:21 |
|
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 11 WA * 34 |
ソースコード
#include <iostream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <queue>
#include <string>
#include <map>
#include <set>
#include <stack>
#include <tuple>
#include <deque>
#include <array>
#include <numeric>
#include <bitset>
#include <iomanip>
#include <cassert>
#include <chrono>
#include <random>
#include <limits>
#include <iterator>
#include <functional>
#include <sstream>
#include <fstream>
#include <complex>
#include <cstring>
#include <unordered_map>
#include <unordered_set>
using namespace std;
using ll = long long;
constexpr int INF = 1001001001;
constexpr int mod = 1000000007;
// constexpr int mod = 998244353;
template<class T>
inline bool chmax(T& x, T y){
if(x < y){
x = y;
return true;
}
return false;
}
template<class T>
inline bool chmin(T& x, T y){
if(x > y){
x = y;
return true;
}
return false;
}
template< typename flow_t >
struct PushRelabel {
const flow_t INF;
struct edge {
int to;
flow_t cap;
int rev;
bool isrev;
int idx;
};
vector< vector< edge > > graph;
vector< flow_t > ex;
int relabels, high;
vector< int > cnt, h;
vector< vector< int > > hs;
PushRelabel(int V) : graph(V), INF(numeric_limits< flow_t >::max()), hs(V + 1), high(0) {}
void add_edge(int from, int to, flow_t cap, int idx = -1) {
graph[from].emplace_back((edge) {to, cap, (int) graph[to].size(), false, idx});
graph[to].emplace_back((edge) {from, 0, (int) graph[from].size() - 1, true, idx});
}
void update_height(int idx, int nxt_height) {
++relabels;
if(h[idx] != graph.size() + 1) {
--cnt[h[idx]];
}
h[idx] = nxt_height;
if(h[idx] != graph.size() + 1) {
high = nxt_height;
++cnt[nxt_height];
if(ex[idx] > 0) hs[nxt_height].emplace_back(idx);
}
}
void global_relabel(int idx) {
for(int i = 0; i <= high; i++) hs[i].clear();
relabels = 0;
high = 0;
h.assign(graph.size(), graph.size() + 1);
cnt.assign(graph.size(), 0);
queue< int > que;
que.emplace(idx);
h[idx] = 0;
while(que.size()) {
int p = que.front();
que.pop();
for(auto &e : graph[p]) {
if(h[e.to] == graph.size() + 1 && graph[e.to][e.rev].cap > 0) {
que.emplace(e.to);
high = h[p] + 1;
update_height(e.to, high);
}
}
}
}
void push(int idx, edge &e) {
if(h[e.to] == graph.size() + 1) return;
if(ex[e.to] == 0) {
hs[h[e.to]].emplace_back(e.to);
}
flow_t df = min(ex[idx], e.cap);
e.cap -= df;
graph[e.to][e.rev].cap += df;
ex[idx] -= df;
ex[e.to] += df;
}
void discharge(int idx) {
int next_height = (int) graph.size() + 1;
for(auto &&e : graph[idx]) {
if(e.cap > 0) {
if(h[idx] == h[e.to] + 1) {
push(idx, e);
if(ex[idx] <= 0) return;
} else {
next_height = min(next_height, h[e.to] + 1);
}
}
}
if(cnt[h[idx]] > 1) {
update_height(idx, next_height);
} else {
for(; high >= h[idx]; hs[high--].clear()) {
for(int j : hs[high]) update_height(j, graph.size() + 1);
}
}
}
flow_t max_flow(int s, int t) {
ex.assign(graph.size(), 0);
ex[s] = INF;
ex[t] = -INF;
global_relabel(t);
for(auto &e : graph[s]) push(s, e);
for(; high >= 0; high--) {
while(!hs[high].empty()) {
int idx = hs[high].back();
hs[high].pop_back();
discharge(idx);
if(relabels >= graph.size() * 4) global_relabel(t);
}
}
return ex[t] + INF;
}
void output() {
for(int i = 0; i < graph.size(); i++) {
for(auto &e : graph[i]) {
if(e.isrev) continue;
auto &rev_e = graph[e.to][e.rev];
cout << i << "->" << e.to << " (flow: " << rev_e.cap << "/" << e.cap + rev_e.cap << ")" << endl;
}
}
}
};
int main(){
ios::sync_with_stdio(false);
cin.tie(nullptr);
int H, W;
cin >> H >> W;
vector<vector<ll>> G(H, vector<ll>(W));
int s = H * W + H + W, t = s + 1, V = s + 2;
PushRelabel<ll> g(V);
ll ans = 0;
for(int i = 0; i < H; ++i){
for(int j = 0; j < W; ++j){
cin >> G[i][j];
int v = i * W + j;
g.add_edge(v, t, G[i][j]);
int w = H * W + i, x = H * W + H + j;
g.add_edge(w, v, INF);
g.add_edge(x, v, INF);
}
}
vector<ll> R(H), C(W);
for(int i = 0; i < H; ++i){
cin >> R[i];
ans += R[i];
int v = H * W + i;
g.add_edge(s, v, R[i]);
}
for(int i = 0; i < W; ++i){
cin >> C[i];
ans += C[i];
int v = H * W + H + i;
g.add_edge(s, v, C[i]);
}
ans -= g.max_flow(s, t);
cout << ans << endl;
return 0;
}