Submission #1268424

#	Time	Username	Problem	Language	Result	Execution time	Memory
1268424		boss_zz	Candies (JOI18_candies)	C++20	100 / 100	96 ms	9924 KiB

candies

#include<bits/stdc++.h>
#define rep(a,b,c) for(ll a=b;a<=c;++a)
#define ll long long 
#define ff first 
#define ss second 
#define mp make_pair 
using namespace std;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
const ll N=2e5+5,inf=1e18;
ll n,A[N],pre[N],nxt[N],ans;
ll Ceil(ll a,ll b){return (a+b-1)/b;}
priority_queue<pll> pq;
bitset<N> exist;
void Delete(ll i){
    if(!i) return ;
    nxt[pre[i]]=nxt[i];
    pre[nxt[i]]=pre[i];
    exist[i]=0;
}
signed main(){
    ios::sync_with_stdio(0);cin.tie(0);
    cin>>n;
    rep(i,1,n) cin>>A[i],pq.push(mp(A[i],i));
    rep(i,1,n) pre[i]=i-1,nxt[i]=i+1,exist[i]=1;
    nxt[n]=0;
    rep(o,1,Ceil(n,2)){
        while(!exist[pq.top().ss]) pq.pop();
        ll v=pq.top().ff,i=pq.top().ss;pq.pop();
        ans+=v;
        if(pre[i]&&nxt[i]){
            A[i]=A[pre[i]]+A[nxt[i]]-A[i];
            pq.push(mp(A[i],i));
        }else Delete(i);
        Delete(pre[i]);
        Delete(nxt[i]);
        cout<<ans<<'\n';
    }
    return 0;
}

• Subtask 1: 8 / 8
• Subtask 2: 92 / 92