結果
| 問題 |
No.1301 Strange Graph Shortest Path
|
| コンテスト | |
| ユーザー |
suta28407928
|
| 提出日時 | 2020-11-27 22:50:45 |
| 言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 3,514 bytes |
| コンパイル時間 | 3,014 ms |
| コンパイル使用メモリ | 198,780 KB |
| 実行使用メモリ | 18,288 KB |
| 最終ジャッジ日時 | 2024-07-26 20:04:21 |
| 合計ジャッジ時間 | 11,193 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
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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
#pragma GCC target("avx2")
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#include <bits/stdc++.h>
using namespace std;
#define DEBUG
#ifdef DEBUG
template <class T, class U>
ostream &operator<<(ostream &os, const pair<T, U> &p) {
os << '(' << p.first << ',' << p.second << ')';
return os;
}
template <class T> ostream &operator<<(ostream &os, const vector<T> &v) {
os << '{';
for(int i = 0; i < (int)v.size(); i++) {
if(i) { os << ','; }
os << v[i];
}
os << '}';
return os;
}
void debugg() { cerr << endl; }
template <class T, class... Args>
void debugg(const T &x, const Args &... args) {
cerr << " " << x;
debugg(args...);
}
#define debug(...) \
cerr << __LINE__ << " [" << #__VA_ARGS__ << "]: ", debugg(__VA_ARGS__)
#define dump(x) cerr << __LINE__ << " " << #x << " = " << (x) << endl
#else
#define debug(...) (void(0))
#define dump(x) (void(0))
#endif
using namespace std;
typedef long long ll;
typedef vector<ll> vl;
typedef vector<vl> vvl;
typedef vector<char> vc;
typedef vector<string> vs;
typedef vector<bool> vb;
typedef vector<double> vd;
typedef pair<ll,ll> P;
typedef pair<int,int> pii;
typedef vector<P> vpl;
typedef tuple<ll,ll,ll> tapu;
#define rep(i,n) for(int i=0; i<(n); i++)
#define REP(i,a,b) for(int i=(a); i<(b); i++)
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
const int inf = 1<<30;
const ll linf = 1LL<<62;
const int MAX = 510000;
int dy[8] = {0,-1,0,1,1,-1,-1,1};
int dx[8] = {-1,0,1,0,1,-1,1,-1};
const double pi = acos(-1);
const double eps = 1e-7;
template<typename T1,typename T2> inline bool chmin(T1 &a,T2 b){
if(a>b){
a = b; return true;
}
else return false;
}
template<typename T1,typename T2> inline bool chmax(T1 &a,T2 b){
if(a<b){
a = b; return true;
}
else return false;
}
template<typename T> inline void print(T &a){
int sz = a.size();
for(auto itr = a.begin(); itr != a.end(); itr++){
cout << *itr;
sz--;
if(sz) cout << " ";
}
cout << "\n";
}
template<typename T1,typename T2> inline void print2(T1 a, T2 b){
cout << a << " " << b << "\n";
}
template<typename T1,typename T2,typename T3> inline void print3(T1 a, T2 b, T3 c){
cout << a << " " << b << " " << c << "\n";
}
void mark() {cout << "#" << "\n";}
ll pcount(ll x) {return __builtin_popcountll(x);}
//const int mod = 1e9 + 7;
const int mod = 998244353;
struct edge{
ll to, c, d, id, mode;
};
int main(){
ll n,m; cin >> n >> m;
vector<vector<edge>> G(n);
rep(i,m){
ll u,v,c,d; cin >> u >> v >> c >> d; u--; v--;
G[u].push_back(edge{v,c,d,i,0});
G[v].push_back(edge{u,c,d,i,0});
}
priority_queue<P,vector<P>,greater<P>> pq;
vl d(n,linf);
d[0] = 0;
vl pre(n);
pq.emplace(0,0);
while(!pq.empty()){
P p = pq.top(); pq.pop();
ll u = p.second;
if(d[u] < p.first) continue;
for(auto v : G[u]){
if(chmin(d[v.to], d[u] + v.c)){
pre[v.to] = v.id;
pq.emplace(d[v.to], v.to);
}
}
}
ll ans = d[n-1];
ll now = n-1;
while(now > 0){
for(auto &v : G[now]){
if(v.id == pre[now]){
v.mode = 1;
now = v.to;
break;
}
}
}
rep(i,n) d[i] = linf; d[n-1] = 0;
pq.emplace(0,n-1);
while(!pq.empty()){
P p = pq.top(); pq.pop();
ll u = p.second;
if(d[u] < p.first) continue;
for(auto v : G[u]){
ll cost = v.mode == 0 ? v.c : v.d;
if(chmin(d[v.to], cost + d[u])){
pq.emplace(d[v.to], v.to);
}
}
}
ans += d[0];
cout << ans << "\n";
}
suta28407928