Submission #1063468

#TimeUsernameProblemLanguageResultExecution timeMemory
1063468jamjanekComparing Plants (IOI20_plants)C++14
0 / 100
4091 ms144028 KiB
#include "plants.h" #include<bits/stdc++.h> using namespace std; int perm[200010]; queue<int>kolejka; set<int>zera; int n, k; bool dodane[200010]; int nast(int val){ if(zera.size()==0)return -1; if(zera.upper_bound(val)==zera.end()){ return *zera.begin(); } return *zera.upper_bound(val); } void rozpatrz(int val){ if(val==-1)return; if(dodane[val])return; if(zera.lower_bound(val)==zera.begin()){ int pom = *zera.rbegin(); if(val - pom+n > k-1){ kolejka.push(val); dodane[val] = 1; } return; } else{ auto it = zera.lower_bound(val); it--; int pom =*it; if(val-pom > k-1){ kolejka.push(val); dodane[val] = 1; } } } const int base = 1<<18; int mini[2*base]; int lazy[2*base]; void push(int w){ if(!lazy[w])return; mini[w*2]+=lazy[w]; lazy[w*2]+=lazy[w]; mini[w*2+1]+=lazy[w]; lazy[w*2+1]+=lazy[w]; mini[w] = min(mini[w*2], mini[w*2+1]); lazy[w] = 0; } void dodaj(int w, int l, int p, int a, int b, int val){ if(b<l || p<a)return; if(a<=l && p<=b){ mini[w]+=val; lazy[w]+=val; return; } push(w); dodaj(w*2, l, (l+p)/2, a, b, val); dodaj(w*2+1, (l+p)/2+1, p, a, b, val); mini[w] = min(mini[w*2], mini[w*2+1]); } void odejmij(int l, int p){ l = (l+n)%n, p = (p+n)%n; if(l<=p) dodaj(1, 0, base-1, l, p, -1); else{ dodaj(1, 0, base-1, l, n-1, -1); dodaj(1, 0, base-1, 0, p, -1); } } int znajdz(int w){ if(w>base){ if(mini[w]==0)return w-base; else return -1; } if(mini[w]>0)return -1; push(w); int pom = znajdz(w*2); if(pom==-1)pom = znajdz(w*2+1); else znajdz(w*2+1); mini[w] = min(mini[w*2], mini[w*2+1]); return pom; } void init(int K, std::vector<int> r) { n = r.size(); int i; k = K; //odzyskaj permutacje for(i=0;i<n;i++) if(r[i]==0) zera.insert(i); for(auto j: zera){ rozpatrz(j); } for(i=0;i<base;i++){ if(i>n || r[i]==0) dodaj(1, 0, base-1, i, i, 1000000000); else dodaj(1, 0, base-1, i, i, r[i]); } int numer = n-1; while(kolejka.size()){ auto x = kolejka.front(); kolejka.pop(); perm[x] = numer--; zera.erase(x); odejmij(x-k+1, x-1); vector<int>nowe_zera; while(mini[1]==0){ int j = znajdz(1); dodaj(1, 0, base-1, j, j, 1000000000); zera.insert(j); nowe_zera.push_back(j); } for(auto j: nowe_zera) rozpatrz(j); rozpatrz(nast(x)); // for(auto j: nowe_zera)printf("%d ", j); // printf("\nKONIEC %d\n", x); } // for(i=0;i<n;i++)printf("%d ", perm[i]);printf("\n"); return; } int compare_plants(int x, int y) { if(perm[x]<perm[y]) return -1; if(perm[x]>perm[y]) return 1; return 0; }
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