Submission #601357

#TimeUsernameProblemLanguageResultExecution timeMemory
601357IwanttobreakfreeBubble Sort 2 (JOI18_bubblesort2)C++98
0 / 100
9091 ms1464 KiB
#include <iostream> #include <vector> #include <map> #include "bubblesort2.h" using namespace std; int find_min(int n,int l,int r,vector<int>& t,int x){ if(t[n]>=x)return -1; if(l==r&&t[n]<x)return l; int mid=(r+l)/2; if(t[(n<<1)+1]<x)return find_min((n<<1)+1,mid+1,r,t,x); if(t[(n<<1)]<x)return find_min(n<<1,l,mid,t,x); return -1; } void p_upd(int n,int l,int r,vector<int>& t,int a,int x){ // cout<<l<<' '<<r<<' '<<x<<'\n'; if(l>a||r<a)return; if(l==r&&l==a)t[n]=x; else{ int mid=(r+l)/2; p_upd(n<<1,l,mid,t,a,x); p_upd((n<<1)+1,mid+1,r,t,a,x); t[n]=max(t[n<<1],t[(n<<1)+1]); } } void build(int n,int l,int r,vector<int>& t,vector<int>& li){ if(l==r)t[n]=li[l]; else{ int mid=(r+l)/2; build(n<<1,l,mid,t,li); build((n<<1)+1,mid+1,r,t,li); t[n]=min(t[n<<1],t[(n<<1)+1]); } } void p_updminimum(int n,int l,int r,vector<int>& t,int a,int x){ if(l>a||r<a)return; if(l==r&&l==a)t[n]=x; else{ int mid=(r+l)/2; p_updminimum(n<<1,l,mid,t,a,x); p_updminimum((n<<1)+1,mid+1,r,t,a,x); t[n]=min(t[n<<1],t[(n<<1)+1]); } } int val(int n,int l,int r,vector<int>& t,int a,int b){ if(l>b||r<a)return -1e9; if(l>=a&&r<=b)return t[n]; int mid=(r+l)/2; int valls=val(n<<1,l,mid,t,a,b); int valrs=val((n<<1)+1,mid+1,r,t,a,b); return max(valls,valrs); } vector<int> countScans(vector<int> A,vector<int> X,vector<int> V){ int Q=X.size(),N=A.size(); vector<int> answer(Q); vector<int> t_min(4*N),t_sol(4*N); build(1,0,N-1,t_min,A); for(int i=N-1;i>=0;i--){ int u=find_min(1,0,N-1,t_min,A[i]); //cout<<u<<' '; if(i<u){ int v=val(1,0,N-1,t_sol,i+1,u); p_upd(1,0,N-1,t_sol,i,v+1); } } for(int j=0;j<Q;j++) { A[X[j]]=V[j]; p_updminimum(1,0,N-1,t_min,X[j],V[j]); for(int i=X[j];i>=0;i--){ int u=find_min(1,0,N-1,t_min,A[i]); //cout<<A[i]<<' '<<i<<' '<<u<<'\n'; if(i<u){ int v=val(1,0,N-1,t_sol,i+1,u); p_upd(1,0,N-1,t_sol,i,v+1); } } answer[j]=t_sol[1]; //cout<<t_sol[1]<<' '; } //for(int ans:answer)cout<<ans<<' '; return answer; } /*int main(){ vector<int> A={3,2,1,4},X={0,1,2,0},V={3,5,5,5}; countScans(A,X,V); }*/
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