Submission #12712

#TimeUsernameProblemLanguageResultExecution timeMemory
12712dohyun0324Holiday (IOI14_holiday)C++98
100 / 100
1556 ms46088 KiB
#include"holiday.h" #include<string.h> #include<algorithm> using namespace std; int top,s,t=1,pos[100001],k,e,p2[530001],r=1; long long dap,r1[530001],l1[530001],r2[530001],l2[530001],p[530001]; struct data{ int x,y; bool operator<(const data&r)const{ return x>r.x; } }a[100001]; struct data2{ int num; long long sum; }tree[270010]; struct data3{ int x,y,m1,m2; }st[530010]; struct data3 st2[530010]; void update(int x){ int p=x+t-1; if(tree[p].num) return; while(p>0){ tree[p].num++; tree[p].sum+=a[x].x; p/=2; } } void finding(int x,int y,int k,int num){ if(k==1 && num==0){s=0; return;} if(x==y){s=x-1; return;} if(num-tree[k*2].num>=0) { finding((x+y)/2+1,y,k*2+1,num-tree[k*2].num); } else finding(x,(x+y)/2,k*2,num); } long long query(int x,int y,int k,int s,int e){ if(s<=x && y<=e) return tree[k].sum; if(s>y || e<x) return 0; return query(x,(x+y)/2,k*2,s,e)+query((x+y)/2+1,y,k*2+1,s,e); } void gap(int m,int x,int y,int sw){ int i,ps=x; long long maxi=0; for(i=e+1;i<x;i++) update(pos[i]); for(i=x;i<=y;i++) { update(pos[i]); if(sw==1) finding(1,t,1,m-(i-1)-1); else finding(1,t,1,m-(i-1+1)*2); if(maxi<query(1,t,1,1,s)) { maxi=query(1,t,1,1,s); ps=i; } } e=y; p[m]=maxi; p2[m]=ps; } void ins(int i) { int m=(st[i].m1+st[i].m2)/2; st2[i*2-1].m1=st[i].m1; st2[i*2-1].m2=m; st2[i*2-1].x=st[i].x; st2[i*2-1].y=p2[m]; st2[i*2].m1=m+1; st2[i*2].m2=st[i].m2; st2[i*2].x=p2[m]; st2[i*2].y=st[i].y; } void pro(int m1,int m2,int x,int y,int sw){ int i,m; top=1; st[top].m1=m1; st[top].m2=m2; st[top].x=x; st[top].y=y; while(1) { memset(tree,0,sizeof tree); if(st[1].m1==st[1].m2) return; e=0; for(i=1;i<=top;i++){ m=(st[i].m1+st[i].m2)/2; if(m==3) { m=3; } gap(m,st[i].x,st[i].y,sw); } for(i=1;i<=top;i++){ ins(i); } top*=2; for(i=1;i<=top;i++) st[i]=st2[i]; } } long long int findMaxAttraction(int n, int st, int d, int att[]) { int i; for(i=st-1;i>=0;i--) a[st-i].x=att[i], a[st-i].y=st-i; sort(a+1,a+st+1); for(i=1;i<=st;i++) pos[a[i].y]=i; for(i=1;;i++){if(r>=st*3) break; r*=2;} for(i=1;;i++){if(t>=st) break; t*=2;} pro(1,r,1,st,1); for(i=1;i<=r;i++) l1[i]=p[i]; memset(p,0,sizeof p); pro(1,r,1,st,2); for(i=1;i<=r;i++) l2[i]=p[i]; for(i=st+1;i<n;i++) a[i-st].x=att[i], a[i-st].y=i-st; sort(a+1,a+n-st); for(i=1;i<=n-st-1;i++) pos[a[i].y]=i; r=1; for(i=1;;i++){if(r>=(n-st-1)*3) break; r*=2;} for(i=1;;i++){if(t>=n-st-1) break; t*=2;} memset(p,0,sizeof p); pro(1,r,1,n-st-1,1); for(i=1;i<=r;i++) r1[i]=p[i]; memset(p,0,sizeof p); pro(1,r,1,n-st-1,2); for(i=1;i<=r;i++) r2[i]=p[i]; for(i=0;i<=d;i++){ dap=max(dap,l1[i]+r2[d-i]); dap=max(dap,l2[i]+r1[d-i]); if(i>=1) dap=max(dap,l1[i-1]+r2[d-i]+att[st]); if(i>=1) dap=max(dap,l2[i-1]+r1[d-i]+att[st]); } return dap; }
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