제출 #1036106

#제출 시각아이디문제언어결과실행 시간메모리
1036106HNa_seawjingRobot (JOI21_ho_t4)C++14
0 / 100
58 ms17492 KiB
#include <bits/stdc++.h> //code #define fl(i,x,y,z) for(int i=x;i<=y;i=i+z) #define fn(i,x,y,z) for(int i=x;i>=y;i=i-z) #define rep(i,x,y) for(int i=x;i<y;i=i+1) #define all(v) v.begin(),v.end() #define pb push_back #define tle cout<<"tle"<<endl #define edl cout<<"\n" #define el "\n" #define getbit(x,i) ((x>>i)&1) #define bitcnt __builtin_popcount //ham #define pii pair<int,int> #define fi first #define se second #define ll long long #define ld long double #define inf 0x3f3f3f3f //#define int long long using namespace std; const ll mod=1e9+7; int n,m; vector<pii> a[100005]; vector<pair <int,pii>> g[100005]; int d[100005]; int t[100005]; bool vis[100005]; priority_queue< pair < int,int > , vector < pair < int ,int > > , greater < pair < int , int > > > q; void dij(int x) { fl(i,1,n,1) d[i] = 1e9; d[x] = 0; q.push({0, x}); while (!q.empty()) { auto p1 = q.top(); int W = p1.fi; int x = p1.se; q.pop(); if (vis[x]) continue; vis[x] = 1; for (auto p2 : a[x]) { int y = p2.fi; int w = p2.se; if (vis[y] || d[y] < W + w) continue; d[y] = W + w; q.push({W + w, y}); } } } void inp() { cin >> n >> m; fl(i,1,m,1) { int u,v,c,p; cin >> u >> v >> c >> p; g[u].push_back({c, {v, p}}); g[v].push_back({c, {u, p}}); a[u].push_back({v, p}); a[v].push_back({u, p}); } } void sol() { int cur = n; fl(i,1,n,1) { sort(g[i].begin(), g[i].end()); for (auto it : g[i]) t[it.fi] += it.se.se; for (auto it : g[i]) { if (!vis[it.fi]) { ++cur; a[i].push_back({cur,0}); } vis[it.fi] = 1; a[cur].push_back({it.se.fi, t[it.fi] - it.se.se}); a[it.se.fi].push_back({cur, 0}); } for (auto it : g[i]) { t[it.fi] = 0; vis[it.fi] = 0; } } dij(1); if (d[n]==1e9) cout<<"-1"; else cout<<d[n]; } signed main() { // freopen("task.inp","r",stdin); // freopen("task.out","w",stdout); ios_base::sync_with_stdio(false); cin.tie(NULL); inp(); sol(); return 0; } /* /\_/\ ( ._. ) / >V< \ */
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