Submission #1216678

#TimeUsernameProblemLanguageResultExecution timeMemory
1216678LmaoLmaoRobot (JOI21_ho_t4)C++20
0 / 100
176 ms29196 KiB
#include<bits/stdc++.h> #define fi first #define se second #define int long long using namespace std; using ll = long long; using ii = pair<ll, ll>; using aa = array<int,3>; using aa4 = array<int,4>; const int N = 1e6+5; const int INF = 1e9; const int mod = 1e9+7; vector<aa> adj[100005]; map<int,int> mp[100005]; map<int,int> d[100005]; signed main() { ios_base::sync_with_stdio(false); cin.tie(NULL); int n,m; cin >> n >> m; for(int i=1;i<=m;i++) { int u,v,c,w; cin >> u >> v >> c >> w; adj[u].push_back({v,w,c}); adj[v].push_back({u,w,c}); mp[u][c]+=w; mp[v][c]+=w; d[u][c]=1e18; d[v][c]=1e18; } for(int i=2;i<=n;i++) { d[i][0]=1e18; } priority_queue<aa,vector<aa>,greater<aa>> q; q.push({0,1,0}); while(!q.empty()) { aa u=q.top(); q.pop(); if(u[0]>d[u[1]][u[2]]) continue; for(aa v:adj[u[1]]) { if(u[2]!=0 &&v[2]!=u[2]) continue; int cur=mp[u[1]][v[2]]; if(d[v[0]][0]>u[0]+cur-v[1]) { q.push({d[v[0]][0]=u[0]+cur-v[1],v[0],0}); } if(u[2]!=0 &&v[2]==u[2]) continue; if(d[v[0]][v[2]]>u[0]) { q.push({d[v[0]][v[2]]=u[0],v[0],v[2]}); } v[1]=min(v[1],cur-v[1]); if(d[v[0]][0]>u[0]+v[1]) { q.push({d[v[0]][0]=u[0]+v[1],v[0],v[2]}); } } } for(int i=1;i<=n;i++) { //cout << d[i][0] << endl; } if(d[n][0]==1e18) { cout << -1; return 0; } cout << d[n][0]; return 0; } /* ██╗░░██╗██╗░░██╗░█████╗░███╗░░██╗░██████╗░ ░██████╗██╗██╗░░░██╗ ░█████╗░██╗░░░██╗████████╗███████╗ ██║░██╔╝██║░░██║██╔══██╗████╗░██║██╔════╝░ ██╔════╝██║██║░░░██║ ██╔══██╗██║░░░██║╚══██╔══╝██╔════╝ █████═╝░███████║███████║██╔██╗██║██║░░██╗░ ╚█████╗░██║██║░░░██║ ██║░░╚═╝██║░░░██║░░░██║░░░█████╗░░ ██╔═██╗░██╔══██║██╔══██║██║╚████║██║░░╚██╗ ░╚═══██╗██║██║░░░██║ ██║░░██╗██║░░░██║░░░██║░░░██╔══╝░░ ██║░╚██╗██║░░██║██║░░██║██║░╚███║╚██████╔╝ ██████╔╝██║╚██████╔╝ ╚█████╔╝╚██████╔╝░░░██║░░░███████╗ ╚═╝░░╚═╝╚═╝░░╚═╝╚═╝░░╚═╝╚═╝░░╚══╝░╚═════╝░ ╚═════╝░╚═╝░╚═════╝░ ░╚════╝░░╚═════╝░░░░╚═╝░░░╚══════╝ */
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