oj.uz

Submission #875353

# Submission time Handle Problem Language Result Execution time Memory
875353 2023-11-19T08:26:37 Z 1075508020060209tc Candies (JOI18_candies) C++14
100 / 100
 506 ms 38032 KB 
//#pragma GCC optimize("Ofast,no-stack-protector")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")
#include <bits/stdc++.h>
using namespace std;
#define int long long
int n;
int ar[500005];
int ps[2][500005];
set<pair<int,pair<int,int>>>stv[2];
set<pair<pair<int,int>,int>>st[2];
signed main()
{
    cin>>n;
    ar[0]=-1e16;ar[n+1]=-1e16;
    for(int i=1;i<=n;i++){
        cin>>ar[i];
    }
    ps[0][0]=ar[0];
    for(int i=1;i<=n+1;i++){
        ps[0][i]=ps[0][i-1];
        ps[1][i]=ps[1][i-1];
        ps[i%2][i]+=ar[i];
    }
    int ans=0;
    for(int i=0;i<=n+1;i++){
        stv[i%2].insert({ar[i],{i,i}});
        st[i%2].insert({{i,i},ar[i]});
    }
    for(int ttt=1;ttt<=(n+1)/2;ttt++){
        int v0=(*prev(stv[0].end())).first;
        int v1=(*prev(stv[1].end())).first;

        if(v0>v1){
            ans+=v0;
            int ogl=(*prev(stv[0].end())).second.first;
            int ogr=(*prev(stv[0].end())).second.second;
            stv[0].erase({v0,{ogl,ogr}});
            st[0].erase({{ogl,ogr},v0});
            int l;int r;
            auto it=st[1].lower_bound({{ogl,-1},-1000});
            int a;int b;int c;//{ {l,r},v }
            a=(*it).first.first;
            b=(*it).first.second;
            c=(*it).second;
            r=b;
            it--;
            st[1].erase({{a,b},c});
            stv[1].erase({c,{a,b}});
            a=(*it).first.first;
            b=(*it).first.second;
            c=(*it).second;
            l=a;
            st[1].erase({{a,b},c});
            stv[1].erase({c,{a,b}});
            int v=(ps[1][r]-ps[1][l-1])-(ps[0][r]-ps[0][l-1]);
            st[1].insert({{l,r},v});
            stv[1].insert({v,{l,r}});
        }else{
            //continue;
            ans+=v1;
            int ogl=(*prev(stv[1].end())).second.first;
            int ogr=(*prev(stv[1].end())).second.second;
            stv[1].erase({v1,{ogl,ogr}});
            st[1].erase({{ogl,ogr},v1});

            int l;int r;
            auto it=st[0].upper_bound({{ogl,-1},-100 });
            int a;int b;int c;//{ {l,r},v }
            a=(*it).first.first;
            b=(*it).first.second;
            c=(*it).second;
            r=b;

            it--;

            st[0].erase({{a,b},c});
            stv[0].erase({c,{a,b}});
            a=(*it).first.first;
            b=(*it).first.second;
            c=(*it).second;
            l=a;

            st[0].erase({{a,b},c});
            stv[0].erase({c,{a,b}});
            //cout<<l<<" "<<r<<"\n";
            int v=(ps[0][r]-ps[0][l-1])-(ps[1][r]-ps[1][l-1]);
           // cout<<"hehe";
            st[0].insert({{l,r},v});
            stv[0].insert({v,{l,r}});

        }

       cout<<ans<<"\n";

    }


}

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 2652 KB Output is correct
2 Correct 3 ms 2760 KB Output is correct
3 Correct 3 ms 2804 KB Output is correct
4 Correct 2 ms 2664 KB Output is correct
5 Correct 2 ms 2652 KB Output is correct
6 Correct 3 ms 2652 KB Output is correct
7 Correct 3 ms 2660 KB Output is correct
8 Correct 2 ms 2652 KB Output is correct
9 Correct 2 ms 2652 KB Output is correct
10 Correct 2 ms 2652 KB Output is correct
11 Correct 3 ms 2652 KB Output is correct
12 Correct 2 ms 2904 KB Output is correct
13 Correct 2 ms 2652 KB Output is correct
14 Correct 2 ms 2652 KB Output is correct
15 Correct 2 ms 2652 KB Output is correct
16 Correct 2 ms 2652 KB Output is correct
17 Correct 3 ms 2652 KB Output is correct
18 Correct 2 ms 2756 KB Output is correct
19 Correct 2 ms 2652 KB Output is correct
20 Correct 2 ms 2664 KB Output is correct

Subtask #2
92.0 / 92.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 2652 KB Output is correct
2 Correct 3 ms 2760 KB Output is correct
3 Correct 3 ms 2804 KB Output is correct
4 Correct 2 ms 2664 KB Output is correct
5 Correct 2 ms 2652 KB Output is correct
6 Correct 3 ms 2652 KB Output is correct
7 Correct 3 ms 2660 KB Output is correct
8 Correct 2 ms 2652 KB Output is correct
9 Correct 2 ms 2652 KB Output is correct
10 Correct 2 ms 2652 KB Output is correct
11 Correct 3 ms 2652 KB Output is correct
12 Correct 2 ms 2904 KB Output is correct
13 Correct 2 ms 2652 KB Output is correct
14 Correct 2 ms 2652 KB Output is correct
15 Correct 2 ms 2652 KB Output is correct
16 Correct 2 ms 2652 KB Output is correct
17 Correct 3 ms 2652 KB Output is correct
18 Correct 2 ms 2756 KB Output is correct
19 Correct 2 ms 2652 KB Output is correct
20 Correct 2 ms 2664 KB Output is correct
21 Correct 489 ms 37444 KB Output is correct
22 Correct 506 ms 37460 KB Output is correct
23 Correct 441 ms 37652 KB Output is correct
24 Correct 267 ms 37424 KB Output is correct
25 Correct 275 ms 37412 KB Output is correct
26 Correct 247 ms 37460 KB Output is correct
27 Correct 279 ms 37412 KB Output is correct
28 Correct 272 ms 37456 KB Output is correct
29 Correct 283 ms 37528 KB Output is correct
30 Correct 288 ms 37656 KB Output is correct
31 Correct 290 ms 37796 KB Output is correct
32 Correct 294 ms 37468 KB Output is correct
33 Correct 375 ms 37656 KB Output is correct
34 Correct 363 ms 37460 KB Output is correct
35 Correct 342 ms 37324 KB Output is correct
36 Correct 483 ms 37444 KB Output is correct
37 Correct 467 ms 37624 KB Output is correct
38 Correct 468 ms 37496 KB Output is correct
39 Correct 252 ms 37408 KB Output is correct
40 Correct 263 ms 37496 KB Output is correct
41 Correct 258 ms 37460 KB Output is correct
42 Correct 270 ms 37544 KB Output is correct
43 Correct 271 ms 37456 KB Output is correct
44 Correct 277 ms 37460 KB Output is correct
45 Correct 300 ms 37824 KB Output is correct
46 Correct 293 ms 37516 KB Output is correct
47 Correct 309 ms 38032 KB Output is correct
48 Correct 357 ms 37200 KB Output is correct
49 Correct 371 ms 37404 KB Output is correct
50 Correct 345 ms 37204 KB Output is correct