結果
| 問題 |
No.654 Air E869120
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2021-07-03 15:52:25 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
TLE
|
| 実行時間 | - |
| コード長 | 2,855 bytes |
| コンパイル時間 | 2,662 ms |
| コンパイル使用メモリ | 220,508 KB |
| 最終ジャッジ日時 | 2025-01-22 17:15:10 |
|
ジャッジサーバーID (参考情報) |
judge5 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 5 |
| other | AC * 32 TLE * 3 |
コンパイルメッセージ
main.cpp:34:34: warning: use of ‘auto’ in parameter declaration only available with ‘-std=c++20’ or ‘-fconcepts’
34 | ll find_path(int v, int t, ll f, auto& used){
| ^~~~
main.cpp: In function ‘int main()’:
main.cpp:70:14: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
70 | scanf("%lld %lld %lld %lld %lld", &u, &v, &p, &q, &w);
| ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ソースコード
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
#define REP(i, n) for(int i=0; i<n; i++)
#define REPi(i, a, b) for(int i=int(a); i<int(b); i++)
#define MEMS(a,b) memset(a,b,sizeof(a))
#define mp make_pair
#define MOD(a, m) ((a % m + m) % m)
template<class T>bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }
template<class T>bool chmin(T &a, const T &b) { if (b<a) { a=b; return 1; } return 0; }
const ll MOD = 1e9+7;
const ll INF = 1LL << 60;
const int MAX_V = 2100;
using P = pair<ll, ll>;
//// {行き先, 容量, 逆辺}
//// {to, cap, rev}
//// G[v][to] <-> G[to][rev]
using Edge = tuple<int, ll, int>;
vector<Edge> G[MAX_V];
//// G に辺と逆辺を追加
void add_edge(int from, int to, ll cap){
G[from].push_back(Edge(to, cap, G[to].size()));
G[to].push_back(Edge(from, 0, G[from].size()-1));
}
//// 増加パスをdfsで探索
ll find_path(int v, int t, ll f, auto& used){
if(v == t) return f;
used[v] = true;
for(auto& [to, cap, rev] : G[v]){
if(!used[to] && cap > 0){
ll d = find_path(to, t, min(f, cap), used);
if(d > 0){
cap -= d;
get<1>(G[to][rev]) += d;
return d;
}
}
}
return 0;
}
//// sからtへの最大流を求める
ll max_flow(int s, int t){
ll flow = 0;
while(1){
vector<bool> used(MAX_V);
ll f = find_path(s, t, INF, used);
if(f == 0) break;
flow += f;
}
return flow;
}
int main(){
ll N, M, D;
cin >> N >> M >> D;
using T = tuple<ll, ll, ll, ll, ll>;
vector<T> X;
REP(i,M){
ll u, v, p, q, w;
//cin >> u >> v >> p >> q >> w;
scanf("%lld %lld %lld %lld %lld", &u, &v, &p, &q, &w);
u--, v--;
X.push_back(T(u, v, p, q, w));
}
vector<vector<int>> vertex(N);
vertex[0].push_back(0);
vertex[N-1].push_back(1000000000LL);
for(auto& [u, v, p, q, w] : X){
vertex[u].push_back(p);
vertex[v].push_back(q+D);
}
map<P, int> pos2idx;
ll cnt = 0;
REP(v, N){
sort(vertex[v].begin(), vertex[v].end());
vertex[v].erase(unique(vertex[v].begin(), vertex[v].end()), vertex[v].end());
int size = vertex[v].size();
REP(i, size){
pos2idx[P(v, vertex[v][i])] = cnt++;
}
}
for(auto& [u, v, p, q, w] : X){
auto v0 = pos2idx[P(u, p)];
auto v1 = pos2idx[P(v, q+D)];
add_edge(v0, v1, w);
}
REP(v, N){
int size = vertex[v].size();
REP(i, size-1){
auto v0 = pos2idx[P(v, vertex[v][i])];
auto v1 = pos2idx[P(v, vertex[v][i+1])];
add_edge(v0, v1, INF);
}
}
ll ans = max_flow(0, cnt-1);
cout << ans << endl;
return 0;
}