Submission #408742

#TimeUsernameProblemLanguageResultExecution timeMemory
408742AmineWeslatiBubble Sort 2 (JOI18_bubblesort2)C++14
0 / 100
4309 ms1120 KiB
#include <bits/stdc++.h> #include "bubblesort2.h" using namespace std; typedef long long ll; typedef vector<int>vi; #define pb push_back #define sz(v) (int)v.size() #define all(x) begin(x),end(x) #define FOR(i,a,b) for(int i=a; i<b; i++) #define ROF(i,a,b) for(int i=b-1; i>=a; i--) //--------------------------------------------// int N,Q; vi a; const int MX=5e5+10; /*set<int>t[MX*4]; void build(int pos=1, int tl=0, int tr=N-1){ if(tl==tr){ t[pos].insert(a[tl]); return; } int tm=(tl+tr)/2; build(pos*2,tl,tm); build(pos*2+1,tm+1,tr); for(int x: t[pos*2]) t[pos].insert(x); for(int x: t[pos*2+1]) t[pos].insert(x); } void upd(int idx, int v, int vo, int pos=1, int tl=0, int tr=N-1){ t[pos].erase(vo); t[pos].insert(v); if(tl==tr) return; int tm=(tl+tr)/2; if(idx<=tl) upd(idx,v,vo,pos*2,tl,tm); else upd(idx,v,vo,pos*2+1,tm+1,tr); } int get(int ty, int l, int r, int v, int pos=1, int tl=0, int tr=N-1){ if(l>r) return 0; if(tl==l && tr==r){ int cnt=0; if(ty){ for(int x: t[pos]){ if(x<v) cnt++; else break; } } else{ for(int x: t[pos]){ if(x>v) cnt++; } } return cnt; } int tm=(tl+tr)/2; return get(ty,l,min(r,tm),v,pos*2,tl,tm) + get(ty,max(l,tm+1),r,v,pos*2+1,tm+1,tr); }*/ void ckmax(int &x, int y){x=max(x,y);} vi countScans(vi A,vi X,vi V){ N=sz(A); Q=sz(X); a.assign(all(A)); vi ans(Q); FOR(idx,0,Q){ a[X[idx]]=V[idx]; vi st,vec(N); ROF(i,0,N){ while(sz(st) && st.back()<a[i]) st.pop_back(); if(!sz(st)){ vec[i]=(i!=N-1); } else{ if(st.back()==i+1 && !vec[st.back()]) vec[i]=0; else vec[i]=vec[st.back()]+1; } st.pb(i); } vi temp; temp.assign(all(a)); sort(all(temp)); unordered_map<int,int>mp; ROF(i,0,N) mp[temp[i]]=i; FOR(i,0,N){ ckmax(vec[i],mp[a[i]]-i); } ans[idx]=0; FOR(i,0,N) ckmax(ans[idx],vec[i]); } return ans; } /* 4 2 1 2 3 4 0 3 2 1 */
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