Submission #1049561

#TimeUsernameProblemLanguageResultExecution timeMemory
1049561inesfiJousting tournament (IOI12_tournament)C++17
100 / 100
171 ms9484 KiB
#include<bits/stdc++.h> using namespace std; const int TAILLEMAXI=100*1000+2,PUISSMAXI=19,DECALAGE=(1<<18); int arbremax[2*DECALAGE+1]; int arbresomme[2*DECALAGE+1]; int posdeb[TAILLEMAXI]; vector<pair<int,int>> tours; vector<pair<int,int>> inter; int deb,fin,milieu,val,premier,dernier,nbfois,ec,rec,rep; int cumu[TAILLEMAXI]; int somme(int a,int b){ if (a==b){ return arbresomme[a]; } if (a%2==1){ return arbresomme[a]+somme(a+1,b); } if (b%2==0){ return arbresomme[b]+somme(a,b-1); } return somme(a/2,b/2); } int maxi(int a,int b){ if (a==b){ return arbremax[a]; } if (a%2==1){ return max(arbremax[a],maxi(a+1,b)); } if (b%2==0){ return max(arbremax[b],maxi(a,b-1)); } return maxi(a/2,b/2); } void changer(int a){ while (a!=0){ arbresomme[a]++; a/=2; } } int GetBestPosition(int nbpers, int nbtours, int nouvpers, int *K, int *S, int *E) { for (int i=0;i<nbpers-1;i++){ posdeb[i]=K[i]; arbremax[DECALAGE+i]=posdeb[i]; } for (int i=DECALAGE-1;i>=0;i--){ arbremax[i]=max(arbremax[i*2],arbremax[i*2+1]); } for (int i=0;i<nbtours;i++){ tours.push_back(make_pair(S[i],E[i])); } for (int i=0;i<nbtours;i++){ deb=0; fin=nbpers-1; while (deb<fin){ milieu=(deb+fin+1)/2; val=somme(0+DECALAGE,milieu-1+DECALAGE); if (milieu-val>=tours[i].first){ fin=milieu-1; } else { deb=milieu; } } if (arbresomme[deb+DECALAGE]==0 and tours[i].first!=0){ deb++; } premier=deb; deb=0; fin=nbpers; //cout<<somme(DECALAGE,4+DECALAGE)<<endl; while (deb<fin){ milieu=(deb+fin)/2; val=somme(0+DECALAGE,milieu-1+DECALAGE); if (milieu-val>tours[i].second){ fin=milieu; } else { deb=milieu+1; } } deb--; dernier=deb; inter.push_back({premier,dernier}); deb=0; nbfois=dernier-premier+1-somme(premier+DECALAGE,dernier+DECALAGE)-1; for (int j=0;j<nbfois;j++){ deb=premier; fin=dernier; while (deb<fin){ milieu=(deb+fin)/2; val=somme(deb+DECALAGE,milieu+DECALAGE); if (val!=milieu-deb+1){ fin=milieu; } else { deb=milieu+1; } } changer(deb+DECALAGE); } } for (int i=0;i<nbtours;i++){ //cout<<inter[i].first<<" "<<inter[i].second<<endl; val=maxi(inter[i].first+DECALAGE,inter[i].second-1+DECALAGE); if (val<nouvpers){ //cout<<42<<endl; cumu[inter[i].first]++; cumu[inter[i].second+1]--; } } rec=-1; for (int i=0;i<nbpers;i++){ ec+=cumu[i]; if (ec>rec){ rec=ec; rep=i; } } //cout<<rep<<endl; return rep; }
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