結果

問題 No.119 旅行のツアーの問題
ユーザー shkiiii_
提出日時 2025-01-25 00:41:53
言語 C++17
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 2 ms / 5,000 ms
コード長 4,842 bytes
コンパイル時間 2,444 ms
コンパイル使用メモリ 211,996 KB
実行使用メモリ 6,820 KB
最終ジャッジ日時 2025-01-25 00:41:57
合計ジャッジ時間 3,823 ms
ジャッジサーバーID
(参考情報)
judge4 / judge1
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 4
other AC * 19
権限があれば一括ダウンロードができます

ソースコード

diff #
プレゼンテーションモードにする

#include<bits/stdc++.h>
// #include<atcoder/all>
// #include<boost/multiprecision/cpp_int.hpp>
using namespace std;
// using namespace atcoder;
// using bint = boost::multiprecision::cpp_int;
using ll = long long;
using ull = unsigned long long;
using ld = long double;
using P = pair<ll,ll>;
using vi = vector<ll>;
using vvi = vector<vi>;
using vvvi = vector<vvi>;
using ve = vector<vector<int>>;
using vb = vector<bool>;
using vvb = vector<vb>;
#define rep(i,s,n) for(ll i = (ll)s;i < (ll)n;i++)
#define ALL(x) (x).begin(),(x).end()
#define sz(c) ((ll)(c).size())
#define LB(A,x) (int)(lower_bound(A.begin(),A.end(),x)-A.begin())
#define UB(A,x) (int)(upper_bound(A.begin(),A.end(),x)-A.begin())
// #define MOD 1000000007
#define MOD 998244353
template<typename T>using min_priority_queue=priority_queue<T,vector<T>,greater<T>>;
template<typename T>ostream&operator<<(ostream&os,vector<T>&v){for(int i = 0;i < v.size();i++)os<<v[i]<<(i+1!=v.size()?" ":"");return os;}
template<typename T>istream&operator>>(istream&is,vector<T>&v){for(T&in:v)is>>in;return is;}
template<typename T1,typename T2>ostream&operator<<(ostream&os,pair<T1,T2>&p){os<<p.first<<" "<<p.second;return os;}
template<typename T1,typename T2>istream&operator>>(istream&is,pair<T1,T2>&p){is>>p.first>>p.second;return is;}
template<typename T> inline bool chmax(T &a,T b){if(a < b){a = b;return true;}return false;}
template<typename T> inline bool chmin(T &a,T b){if(a > b){a = b;return true;}return false;}
ld dist(ld x1,ld y1,ld x2, ld y2){return sqrtl((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));}
// https://ei1333.github.io/luzhiled/snippets/graph/dinic.html
template<typename flow_t>
struct Dinic{
/*
fromcap
is_e == true""
""efr -> tov[e.to][e.ref].cap
*/
struct edge{
int to;
flow_t cap;
int ref;//
bool is_e;//
int idx;//index
};
vector<vector<edge>> v;
vector<int> mn_cost,iter;
const flow_t inf;
Dinic(int n):inf(numeric_limits<flow_t>::max()),v(n){}
void add_edge(int fr,int to,flow_t cap,int idx = -1){
v[fr].emplace_back((edge){to,cap,(int)v[to].size(),true,idx});
v[to].emplace_back((edge){fr,0,(int)v[fr].size()-1,false,idx});
}
bool bfs(int s,int t){
mn_cost.assign(v.size(),-1);
queue<int> que;
mn_cost[s] = 0;
que.push(s);
while(!que.empty() && mn_cost[t] == -1){
int ov = que.front();que.pop();
for(auto &e : v[ov]){
if(e.cap > 0 && mn_cost[e.to] == -1){
mn_cost[e.to] = mn_cost[ov] + 1;
que.push(e.to);
}
}
}
return mn_cost[t] != -1;
}
flow_t dfs(int ov,const int t,flow_t flow){
if(ov == t)return flow;
for(int &i = iter[ov];i < v[ov].size();i++){
edge &e = v[ov][i];
if(e.cap > 0 && mn_cost[ov] < mn_cost[e.to]){
flow_t d = dfs(e.to,t,min(flow,e.cap));
if(d > 0){
e.cap -= d;
v[e.to][e.ref].cap += d;
return d;
}
}
}
return 0;
}
// O(m n^2)(n: m:)
flow_t max_flow(int s,int t){
flow_t flow = 0;
while(bfs(s,t)){
iter.assign(v.size(),0);
flow_t f = 0;
while((f = dfs(s,t,inf)) > 0)flow += f;
}
return flow;
}
void output(){
for(int i = 0;i < v.size();i++){
for(auto &e : v[i]) {
if(!e.is_e) continue;
auto &rev_e = v[e.to][e.ref];
cout << i << "->" << e.to << " (flow: " << rev_e.cap << "/" << e.cap + rev_e.cap << ")" << "\n";
}
}
}
};
int main(){
ios_base::sync_with_stdio(0), cin.tie(0);
int n;cin >> n;
Dinic<ll> dn(2*n+2);
int S = 2*n,T = S+1;
const ll inf = 1ll << 40;
auto ch = [](int i,int d){return 2*i+d;};
// minus
ll res = 0;
rep(i,0,n){
vi th(3);cin >> th[2] >> th[0];
rep(j,0,3)th[j] *= -1;
res += th[2];
rep(j,0,2){
ll k = th[j]-th[j+1];
if(k > 0){
dn.add_edge(S,ch(i,j),k);
}else if(k < 0){
dn.add_edge(ch(i,j),T,-k);
res += k;
}
}
dn.add_edge(ch(i,1),ch(i,0),inf);
}
int m;cin >> m;
vvi P = {
{0,0,0},{0,0,0},{0,-inf,-inf}
};
rep(i,0,m){
int d,e;cin >> d >> e;
res += inf;
res += -inf;
dn.add_edge(ch(d,1),T,inf);
// phi
rep(k,0,2)rep(l,0,2){
ll A = P[k+1][l+1] - P[k+1][l] - P[k][l+1] + P[k][l];
if(!A)continue;
res += A;
dn.add_edge(S,ch(d,k),-A);
dn.add_edge(ch(d,k),ch(e,l),-A);
}
}
res += dn.max_flow(S,T);
cout << -res << "\n";
return 0;
}
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