結果
| 問題 |
No.1301 Strange Graph Shortest Path
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2020-11-27 23:19:05 |
| 言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 3,133 bytes |
| コンパイル時間 | 2,032 ms |
| コンパイル使用メモリ | 182,396 KB |
| 実行使用メモリ | 12,544 KB |
| 最終ジャッジ日時 | 2024-07-26 20:26:10 |
| 合計ジャッジ時間 | 7,352 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 2 |
| other | AC * 28 WA * 5 |
ソースコード
#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL_
void debug_out() {cerr << endl;}
template<typename Head,typename... Tail> void debug_out(Head H,Tail... T){cerr << ' ' << H; debug_out(T...);}
#define debug(...) cerr << 'L' << __LINE__ << " [" << #__VA_ARGS__ << "]:",debug_out(__VA_ARGS__)
#define dump(x) cerr << 'L' << __LINE__ << " " << #x << " = " << (x) << endl;
#else
#define debug(...) (void(0))
#define dump(x) (void(0))
#endif
#define rep(i,n) for (int i = 0; i < (int)(n); i ++)
#define irep(i,n) for (int i = (int)(n) - 1;i >= 0;--i)
using ll = long long;
using PL = pair<ll,ll>;
using P = pair<int,int>;
constexpr int INF = 1000000000;
constexpr long long HINF = 100000'00000'00000;
constexpr long long MOD = 1000000007;// = 998244353;
constexpr double EPS = 1e-4;
constexpr double PI = 3.14159265358979;
#pragma region Macros
template<typename T1,typename T2> ostream &operator<<(ostream &os,const pair<T1,T2> &p) {
os << '(' << p.first << ',' << p.second << ')'; return os;
}
template<typename T> ostream &operator<<(ostream &os,const vector<T> &v) {
os << '[';
for (auto &e:v) {os << e << ',';}
os << ']'; return os;
}
// grid searh
const int dy[8] = {-1,0,1,0,-1,-1,1,1};
const int dx[8] = {0,1,0,-1,-1,1,-1,1};
bool IN(int y,int x,int H,int W) {return (0 <= y)&&(y < H)&&(0 <= x)&&(x < W);}
#pragma endregion
int main() {
cin.tie(nullptr);
ios::sync_with_stdio(false);
cout << fixed << setprecision(20);
int N,M; cin >> N >> M;
vector<vector<P>> G(N);
vector<int> C(M),D(M),used(M,-1);
rep(i,M) {
int a,b,c,d; cin >> a >> b >> c >> d;
--a; --b;
G[a].emplace_back(b,i);
G[b].emplace_back(a,i);
C[i] = c;
D[i] = d;
}
vector<ll> dist(N,HINF);
vector<int> before(N,-1);
dist[0] = 0;
priority_queue<PL,vector<PL>,greater<PL>> q;
q.push({0,0});
while (!q.empty()) {
PL p = q.top(); q.pop();
ll d = p.first;
int v = p.second;
if (dist[v] < d) continue;
for (PL p: G[v]) {
int e = p.first;
ll cost = C[p.second];
if (dist[e] > dist[v] + cost) {
dist[e] = dist[v] + cost;
before[e] = v;
q.push({dist[e],e});
}
}
}
int v = N-1;
while (v > 0) {
for (P p:G[v]) {
if (p.first == before[v]) {
used[p.second] = 1;
break;
}
}
v = before[v];
}
vector<ll> dist2(N,HINF);
dist2[N-1] = 0;
q.push({0,N-1});
while (!q.empty()) {
PL p = q.top(); q.pop();
ll d = p.first;
int v = p.second;
if (dist2[v] < d) continue;
for (PL p: G[v]) {
int e = p.first;
ll cost;
if (used[p.second] >= 0) cost = D[p.second];
else cost = C[p.second];
if (dist2[e] > dist2[v] + cost) {
dist2[e] = dist2[v] + cost;
q.push({dist2[e],e});
}
}
}
cout << dist[N-1] + dist2[0] << '\n';
return 0;
}