Submission #1017792

#TimeUsernameProblemLanguageResultExecution timeMemory
1017792lucriSeptember (APIO24_september)C++17
100 / 100
299 ms21964 KiB
#include <bits/stdc++.h> std::vector<std::vector<int>>a; int pozmin[100010],pozmax[100010],aint[400010]; void update(int poz,int b,int e,int pozu,int val) { if(b>pozu||pozu>e) return; aint[poz]=std::max(aint[poz],val); if(b==e) return; update(poz*2,b,(b+e)/2,pozu,val); update(poz*2+1,(b+e)/2+1,e,pozu,val); } int maxim(int poz,int b,int e,int bi,int ei) { if(b>ei||bi>e) return 0; if(bi<=b&&e<=ei) return aint[poz]; return std::max(maxim(poz*2,b,(b+e)/2,bi,ei), maxim(poz*2+1,(b+e)/2+1,e,bi,ei)); } int initializare(int nod,int &N) { int p1=pozmin[nod],p2=pozmax[nod]; for(auto x:a[nod]) p2=std::max(p2,initializare(x,N)); update(1,1,N,p1,p2); return p2; } int solve(int N, int M, std::vector<int> F, std::vector<std::vector<int>> S) { a.clear(); a.resize(N+5); for(int i=1;i<=4*N;++i) aint[i]=0; for(int i=1;i<N;++i) { a[F[i]].push_back(i); pozmin[i]=N; pozmax[i]=0; } for(int i=0;i<M;++i) for(int j=0;j<N-1;++j) { pozmin[S[i][j]]=std::min(pozmin[S[i][j]],j+1); pozmax[S[i][j]]=std::max(pozmax[S[i][j]],j+1); } initializare(0,N); int poz=1,ans=0; while(poz<N) { int bi=poz,ei=poz; while(maxim(1,1,N,bi,ei)!=ei) ei=maxim(1,1,N,bi,ei); poz=ei+1; ++ans; } return ans; }
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