Submission #834005

#TimeUsernameProblemLanguageResultExecution timeMemory
834005ttamxTropical Garden (IOI11_garden)C++14
0 / 100
3 ms5076 KiB
#include "garden.h" #include "gardenlib.h" #include<bits/stdc++.h> using namespace std; const int N=150005; const int M=300005; const int D=300000; int n,p; vector<int> adj[N]; int dp[2][N][2]; int cnt[2][M]; int cyc[2]; int trav(int t,int u,int s){ s=min(s,(int)adj[u].size()-1); if(dp[t][u][s]!=-2)return dp[t][u][s]; dp[t][u][s]=-1; int v=adj[u][s]; int res=trav(t,v,adj[v][0]==u); if(res!=-1)dp[t][u][s]=res+1; return dp[t][u][s]; } void count_routes(int N, int M, int P, int R[][2], int Q, int G[]){ n=N,p=P; for(int t=0;t<2;t++)for(int i=0;i<n;i++)dp[t][i][0]=dp[t][i][1]=-2; for(int i=0;i<M;i++){ int u=R[i][0],v=R[i][1]; adj[u].emplace_back(v); adj[v].emplace_back(u); } dp[0][p][0]=dp[1][p][1]=0; for(int t=0;t<2;t++){ for(int i=0;i<n;i++){ int res=trav(t,i,0); if(res!=-1)cnt[t][res]++; } cyc[t]=trav(t,adj[p][t],adj[adj[p][0]][t]==p); if(cyc[t]!=-1){ cyc[t]++; for(int i=cyc[t];i<=D;i++)cnt[t][i]+=cnt[t][i-cyc[t]]; } } for(int i=0;i<Q;i++){ if(G[i]<=D){ answer(cnt[0][G[i]]+cnt[1][G[i]]); }else{ int ans=0; for(int t=0;t<2;t++){ if(cyc[t]==-1)continue; int d=G[i]-D; d=(d+cyc[t]-1)/cyc[t]*cyc[t]; ans+=cnt[t][G[i]-d]; } answer(ans); } } }
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...