Submission #867854

#	Time	Username	Problem	Language	Result	Execution time	Memory
867854		ttamx	Lightning Conductor (POI11_pio)	C++14	27 / 100	198 ms	12112 KiB

pio

#include<bits/stdc++.h>

using namespace std;

typedef pair<int,int> p2;

const int N=5e5+5;
const int inf=1e9;

int n;
int h[N],dp[N];

void solvel(int l,int r,int optl,int optr){
    if(l>r)return;
    int mid=(l+r)/2;
    p2 res(-inf,0);
    for(int i=optl;i<=min(mid,optr);i++)res=max(res,p2(h[i]+ceil(sqrt(mid-i))-h[mid],-i));
    dp[mid]=max(dp[mid],res.first);
    int opt=-res.second;
    solvel(l,mid-1,optl,opt);
    solvel(mid+1,r,opt,optr);
}

void solver(int l,int r,int optl,int optr){
    if(l>r)return;
    int mid=(l+r)/2;
    p2 res(-inf,0);
    for(int i=max(mid,optl);i<=optr;i++)res=max(res,p2(h[i]+ceil(sqrt(i-mid))-h[mid],i));
    dp[mid]=max(dp[mid],res.first);
    int opt=res.second;
    solver(l,mid-1,optl,opt);
    solver(mid+1,r,opt,optr);
}

int main(){
    cin.tie(nullptr)->sync_with_stdio(false);
    cin >> n;
    for(int i=1;i<=n;i++)cin >> h[i];
    solvel(1,n,1,n);
    solver(1,n,1,n);
    for(int i=1;i<=n;i++)cout << dp[i] << "\n"; 
}

• Subtask 1: 0 / 9
• Subtask 2: 9 / 9
• Subtask 3: 0 / 9
• Subtask 4: 9 / 9
• Subtask 5: 9 / 9
• Subtask 6: 0 / 9
• Subtask 7: 0 / 9
• Subtask 8: 0 / 9
• Subtask 9: 0 / 9
• Subtask 10: 0 / 9
• Subtask 11: 0 / 10