oj.uz

답안 #990332

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
990332 2024-05-30T08:26:48 Z ian0704 Candies (JOI18_candies) C++17
100 / 100
 73 ms 14292 KB 
//try_1 : 구현 이슈로 wa. retry ㄱㄱ

/*# pragma GCC optimize ("O3")
# pragma GCC optimize ("Ofast")
# pragma GCC optimize ("unroll-loops")
# pragma GCC target("sse,sse2,sse3,ssse3,sse4,avx,avx2")
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll,ll> pll;
const ll inf=1e18;
#define fastio ios_base :: sync_with_stdio(false), cin.tie(NULL), cout.tie(NULL);
ll arr[200010];
int n;
int ch[200010];
ll sum[200010];
int main()
{
    fastio;
    cin>>n;
    for(int i=1;i<=n;i++) cin>>arr[i];
    sum[1]=arr[1];
    for(int i=2;i<=n;i++) 
        sum[i]=sum[i-2]+arr[i];
    priority_queue<pair<ll,pair<ll,ll>>> pq_two;
    priority_queue<pair<ll,ll>> pq_one;
    set<pair<ll,ll>> s,s2;
    for(int i=1;i<=n;i++) pq_one.push({arr[i],i});
    ll res=0;
    for(int i=1;i<=n/2+n%2;i++)
    {
        pair<ll,ll> a={-inf,-inf};
        while(!pq_one.empty() && ch[pq_one.top().second]) pq_one.pop();
        if(!pq_one.empty()) a=pq_one.top();
        pair<ll,pair<ll,ll>> b={-inf,{-inf,-inf}};
        while(!pq_two.empty() && s2.count(pq_two.top().second)) pq_two.pop();
        if(!pq_two.empty()) b=pq_two.top();
        ll temp;
        cout<<a.first<<" "<<a.second<<" | "<<b.first<<" "<<b.second.first<<" "<<b.second.second<<'\n';
        if(a.first>=b.first)
        {
            res+=a.first;
            ch[a.second]=1;
            ll l=a.second,r=a.second;
            if(l>1) l--;
            if(r<n) r++;
            auto idx=s.lower_bound({r,0});
            if(idx!=s.end())
            {
                //cout<<"-> "<<(*idx).first<<" "<<(*idx).second<<'\n';
                temp=(*idx).first;
                if(temp==r)
                {
                    r=(*idx).second;
                    s2.insert(*idx);
                    s.erase(idx);
                }                
            }
            if(idx!=s.begin())
                idx--;
            temp=(*idx).second;
            if(temp==l)
            {
                l=(*idx).first;
                s2.insert(*idx);
                s.erase(idx);
            }
            s.insert({l,r});
            ll num;
            if(r==n && r%2!=l%2)
            {
                num=sum[r-1]-sum[r];
                if(l>1) num+=sum[l-1]-sum[l-2];
            }
            else
            {
                num=sum[r]-sum[r-1];
                if(l>1) num+=sum[l-1]-sum[l-2];                
            }
            pq_two.push({num,{l,r}});
            ch[l]=1;
            ch[r]=1;
        }
        else
        {
            pq_two.pop();
            ll l=b.second.first,r=b.second.second;
            if(l>1) l--;
            if(r<n) r++;
            auto idx=s.lower_bound({r,0});
            if(idx!=s.end())
            {
                temp=(*idx).first;
                if(temp==r)
                {
                    r=(*idx).second;
                    s2.insert(*idx);
                    s.erase(idx);
                }                
            }
            if(idx!=s.begin())
                idx--;
            temp=(*idx).second;
            if(temp==l)
            {
                l=(*idx).first;
                s2.insert(*idx);
                s.erase(idx);
            }
            res+=b.first;
            s.insert({l,r});
            ll num;
            if(r==n && l%2!=r%2)
            {
                num=sum[r-1]-sum[r];
                if(l>1) num+=sum[l-1]-sum[l-2];
            }
            else
            {
                num=sum[r]-sum[r-1];
                if(l>1) num+=sum[l-1]-sum[l-2];
            }
            pq_two.push({num,{l,r}});
            ch[l]=1;
            ch[r]=1;
        }
        cout<<res<<'\n';
    }
}*/


//try_2 : 더 간단하게 pq 하나로 구현 ㄱㄱ

# pragma GCC optimize ("O3")
# pragma GCC optimize ("Ofast")
# pragma GCC optimize ("unroll-loops")
# pragma GCC target("sse,sse2,sse3,ssse3,sse4,avx,avx2")
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll,ll> pll;
#define fastio ios_base :: sync_with_stdio(false), cin.tie(NULL), cout.tie(NULL);
int n;
const ll inf=1e18;
struct Candy
{
    ll num,l,r,ch=0;
};
Candy arr[200010];
priority_queue<pair<ll,ll>> pq;
int main()
{
    fastio;
    cin>>n;
    for(int i=1;i<=n;i++)
    {
        cin>>arr[i].num;
        pq.push({arr[i].num,i});
        arr[i].l=i-1;
        arr[i].r=i+1;
    }
    ll res=0;
    arr[0].num=-inf;
    arr[n+1].num=-inf;
    for(int i=1;i<=n/2+n%2;i++)
    {
        while(!pq.empty() && arr[pq.top().second].ch) pq.pop();
        auto a=pq.top();
        pq.pop();
        arr[arr[a.second].l].ch=1;
        arr[arr[a.second].r].ch=1;
        res+=a.first;
        arr[a.second].num=arr[arr[a.second].l].num+arr[arr[a.second].r].num-arr[a.second].num;
        arr[a.second].l=arr[arr[a.second].l].l;
        arr[arr[a.second].l].r=a.second;
        arr[a.second].r=arr[arr[a.second].r].r;
        arr[arr[a.second].r].l=a.second;
        pq.push({arr[a.second].num,a.second});
        cout<<res<<'\n';
    }
}

Subtask #1
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 6748 KB Output is correct
2 Correct 2 ms 6748 KB Output is correct
3 Correct 2 ms 6748 KB Output is correct
4 Correct 2 ms 6748 KB Output is correct
5 Correct 2 ms 6748 KB Output is correct
6 Correct 2 ms 6748 KB Output is correct
7 Correct 2 ms 6748 KB Output is correct
8 Correct 2 ms 6748 KB Output is correct
9 Correct 2 ms 6748 KB Output is correct
10 Correct 2 ms 6748 KB Output is correct
11 Correct 2 ms 6748 KB Output is correct
12 Correct 2 ms 6804 KB Output is correct
13 Correct 2 ms 6748 KB Output is correct
14 Correct 2 ms 6748 KB Output is correct
15 Correct 2 ms 6748 KB Output is correct
16 Correct 2 ms 6752 KB Output is correct
17 Correct 2 ms 6748 KB Output is correct
18 Correct 2 ms 6748 KB Output is correct
19 Correct 2 ms 6744 KB Output is correct
20 Correct 2 ms 6748 KB Output is correct

Subtask #2
92.0 / 92.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 6748 KB Output is correct
2 Correct 2 ms 6748 KB Output is correct
3 Correct 2 ms 6748 KB Output is correct
4 Correct 2 ms 6748 KB Output is correct
5 Correct 2 ms 6748 KB Output is correct
6 Correct 2 ms 6748 KB Output is correct
7 Correct 2 ms 6748 KB Output is correct
8 Correct 2 ms 6748 KB Output is correct
9 Correct 2 ms 6748 KB Output is correct
10 Correct 2 ms 6748 KB Output is correct
11 Correct 2 ms 6748 KB Output is correct
12 Correct 2 ms 6804 KB Output is correct
13 Correct 2 ms 6748 KB Output is correct
14 Correct 2 ms 6748 KB Output is correct
15 Correct 2 ms 6748 KB Output is correct
16 Correct 2 ms 6752 KB Output is correct
17 Correct 2 ms 6748 KB Output is correct
18 Correct 2 ms 6748 KB Output is correct
19 Correct 2 ms 6744 KB Output is correct
20 Correct 2 ms 6748 KB Output is correct
21 Correct 71 ms 12716 KB Output is correct
22 Correct 73 ms 13264 KB Output is correct
23 Correct 66 ms 13652 KB Output is correct
24 Correct 54 ms 13268 KB Output is correct
25 Correct 54 ms 13520 KB Output is correct
26 Correct 53 ms 13244 KB Output is correct
27 Correct 62 ms 13360 KB Output is correct
28 Correct 62 ms 13248 KB Output is correct
29 Correct 63 ms 13388 KB Output is correct
30 Correct 67 ms 14280 KB Output is correct
31 Correct 63 ms 13412 KB Output is correct
32 Correct 65 ms 13780 KB Output is correct
33 Correct 67 ms 13012 KB Output is correct
34 Correct 62 ms 13008 KB Output is correct
35 Correct 68 ms 13212 KB Output is correct
36 Correct 66 ms 13288 KB Output is correct
37 Correct 66 ms 13248 KB Output is correct
38 Correct 68 ms 13516 KB Output is correct
39 Correct 55 ms 13248 KB Output is correct
40 Correct 53 ms 13248 KB Output is correct
41 Correct 54 ms 14292 KB Output is correct
42 Correct 62 ms 13780 KB Output is correct
43 Correct 62 ms 13540 KB Output is correct
44 Correct 67 ms 13248 KB Output is correct
45 Correct 62 ms 13248 KB Output is correct
46 Correct 62 ms 13320 KB Output is correct
47 Correct 62 ms 13916 KB Output is correct
48 Correct 63 ms 13000 KB Output is correct
49 Correct 66 ms 13520 KB Output is correct
50 Correct 62 ms 13264 KB Output is correct