Submission #543215

#TimeUsernameProblemLanguageResultExecution timeMemory
543215__VariattoCrocodile's Underground City (IOI11_crocodile)C++17
100 / 100
525 ms67444 KiB
#include "crocodile.h" #include <bits/stdc++.h> using namespace std; #define pb push_back #define fi first #define se second #define ll long long const int MAX=1e6+10, MAXV=1e9+100; int n, m, k, ileSpe[MAX], odw[MAX]; int odl[MAX]; bool spe[MAX]; vector<pair<int,int>>g[MAX]; priority_queue<pair<int,int>>kol; pair<int,int>akt[MAX]; int obl(int x){ return(akt[x].se); } int travel_plan(int N, int M, int R[][2], int L[], int K, int P[]){ n=N, k=K, m=M; for(int i=1; i<=m; i++) g[R[i-1][0]+1].pb({R[i-1][1]+1, L[i-1]}), g[R[i-1][1]+1].pb({R[i-1][0]+1, L[i-1]}); for(int i=1; i<=k; i++){ int v=P[i-1]+1; spe[v]=true; } for(int i=1; i<=n; i++){ odl[i]=MAXV; akt[i]={MAXV, MAXV}; if(spe[i]) kol.push({0, i}), odl[i]=0; } while(kol.size()){ auto v=kol.top().se; kol.pop(); if(odw[v]) continue; odw[v]=spe[v]=true; for(auto s: g[v]){ ileSpe[s.fi]++; if(odl[v]+s.se<=akt[s.fi].fi) akt[s.fi].se=akt[s.fi].fi, akt[s.fi].fi=odl[v]+s.se; else if(odl[v]+s.se<akt[s.fi].se) akt[s.fi].se=odl[v]+s.se; if(ileSpe[s.fi]>=2){ int nowy=obl(s.fi); if(odl[s.fi]>nowy) odl[s.fi]=nowy, kol.push({-nowy, s.fi}); } } } return odl[1]; }
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