제출 #1012853

#제출 시각아이디문제언어결과실행 시간메모리
1012853User0069휴가 (IOI14_holiday)C++17
100 / 100
624 ms27868 KiB
#include<bits/stdc++.h> #include <holiday.h> #define taskname "" #define el '\n' #define fi first #define sc second #define pii pair<int, int> #define all(v) v.begin(), v.end() #define int ll using namespace std; using ll=long long; using ull=unsigned long long; using ld=long double; #define Faster ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0); using namespace std; const int maxn=1e5+3; const int mod=1e9+7; const int INF=1e9+1; int n,m,k,a[maxn],b[maxn],c[maxn],cur,S,opt[3*maxn],d,dp[3*maxn][2][3]; int ST[4*maxn],sum[4*maxn]; void update(int id,int cl,int cr,int pos,int val) { if(cl>pos||cr<pos) return; if(cl==cr) { ST[id]=1; sum[id]=val; return; } int mid=(cl+cr)/2; if(pos<=mid) update(2*id,cl,mid,pos,val); else update(2*id+1,mid+1,cr,pos,val); ST[id]=ST[id*2]+ST[id*2+1]; sum[id]=sum[id*2]+sum[id*2+1]; } int get(int id,int cl,int cr,int k) { if(k<=0) return 0; if(ST[id]<=k) return sum[id]; int mid=(cl+cr)/2; if(ST[2*id]<=k) return sum[id*2]+get(id*2+1,mid+1,cr,k-ST[id*2]); else return get(2*id,cl,mid,k); } struct seg { int l,r,optl,optr; }; void dnc(int l,int r,int rev,int jump) { if(l>r) return; queue<seg> q; q.push({0,d,l,r}); int scan=l-1; for(int i=1;i<=4*n;i++) { ST[i]=sum[i]=0; } while(!q.empty()) { seg x=q.front(); q.pop(); // cout<<x.l<<" "<<x.r<<" "<<x.optl<<" "<<x.optr<<"\n"; int mid=(x.l+x.r)/2; dp[mid][rev][jump]=0; opt[mid]=x.optl; if(scan>x.optl) { for(int i=1;i<=4*n;i++) { ST[i]=sum[i]=0; } scan=l-1; } while(scan<x.optl) { ++scan; update(1,1,n,c[scan],a[scan]); } for(int i=x.optl;i<=x.optr;i++) { update(1,1,n,c[i],a[i]); int d=i-l+1; int kk=get(1,1,n,mid-d*jump); if(kk>dp[mid][rev][jump]) { dp[mid][rev][jump]=kk; opt[mid]=i; } } scan=x.optr; // cout<<mid<<" "<<dp[mid][rev][jump]<<"\n"; if(x.l<mid) q.push({x.l,mid-1,x.optl,opt[mid]}); if(x.r>mid) q.push({mid+1,x.r,opt[mid],x.optr}); } } bool cmp(int x,int y) { return a[x]>a[y]; } long long findMaxAttraction(int32_t _n,int32_t start,int32_t _d,int32_t _a[]) { for(int i=0;i<_n;i++) { a[i+1]=_a[i]; b[i+1]=i+1; } d=_d; n=_n; sort(b+1,b+n+1,cmp); for(int i=1;i<=n;i++) { c[b[i]]=i; } // for(int i=1;i<=n;i++) // { // cout<<c[i]<<" "; // update(1,1,n,c[i],a[i]); // } // cout<<"\n"; // for(int i=1;i<=4*n;i++) // { // cout<<ST[i]<<" "; // } // cout<<"\n"; // cout<<get(1,1,n,3)<<"\n"; S=++start; dnc(S+1,n,0,1); dnc(S+1,n,0,2); for(int i=1;i<=n/2;i++) { swap(c[i],c[n+1-i]); swap(a[i],a[n+1-i]); } S=n+1-S; dnc(S+1,n,1,1); dnc(S+1,n,1,2); int ans=0; for(int i=0;i<=d;i++) { ans=max(dp[i][0][1]+dp[d-i][1][2],ans); ans=max(dp[i][1][1]+dp[d-i][0][2],ans); if(i<d) { ans=max(ans,dp[i][0][1]+dp[d-i-1][1][2]+a[S]); ans=max(ans,dp[i][1][1]+dp[d-i-1][0][2]+a[S]); } } // for(int i=0;i<=d;i++) // { // cout<<dp[i][1][1]<<" "; // } // cout<<"\n"; return ans; } //signed main() //{ // if (fopen(taskname".INP","r")) // { // freopen(taskname".INP","r",stdin); // freopen(taskname".OUT","w",stdout); // } // Faster // int32_t a[]={10,2,20,40,30,1,32,15}; // cout<<findMaxAttraction(8,4,7,a); //}
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