oj.uz

Submission #336651

# Submission time Handle Problem Language Result Execution time Memory
336651 2020-12-16T08:41:40 Z syy Candies (JOI18_candies) C++17
100 / 100
 164 ms 16080 KB 
//雪花飄飄北風嘯嘯
//天地一片蒼茫

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/rope>
using namespace std;
using namespace __gnu_pbds;
using namespace __gnu_cxx;
#define ll long long
#define ii pair<ll,ll>
#define iii pair<ll,ii>
#define fi first
#define se second
#define endl '\n'
#define debug(x) cout << #x << " is " << x << endl;

#define rep(x,start,end) for(auto x=(start)-((start)>(end));x!=(end)-((start)>(end));((start)<(end)?x++:x--))
#define all(x) (x).begin(),(x).end()
#define sz(x) (int)(x).size()

ll MAX(ll a){return a;}
ll MIN(ll a){return a;}
template<typename... Args>
    ll MAX(ll a,Args... args){return max(a,MAX(args...));}
template<typename... Args>
    ll MIN(ll a,Args... args){return min(a,MIN(args...));}

#define indexed_set tree<ll,null_type,less<ll>,rb_tree_tag,tree_order_statistics_node_update>

mt19937 rng(chrono::system_clock::now().time_since_epoch().count());

int n;
ll arr[200005];
ll pref[200005];

priority_queue<iii> pq;
bool vis[200005];

ll get(int l,int r){
  if (r&1) return pref[r]-pref[l-1];
  else return pref[l-1]-pref[r];
}

ii range[200005];
int p[200005];

ii merge(ii i,ii j){
  return ii(min(i.fi,j.fi),max(i.se,j.se));
}

int parent(int i){
  if (p[i]==i) return i;
  else return p[i]=parent(p[i]);
}

int main(){
  ios::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);

  cin>>n;
  rep(x,1,n+1){
    cin>>arr[x];
    pref[x]=pref[x-1]+(x&1?arr[x]:-arr[x]);
    pq.push(iii(arr[x],ii(x,x)));

    p[x]=x;
    range[x]=ii(x,x);
  }

  ll curr=0;

  rep(zzz,0,(n+1)/2){
    int l,r;
    do{
      l=pq.top().se.fi;
      r=pq.top().se.se;
      pq.pop();
    }while (vis[l-1] || vis[r+1]);

    vis[l]=true;
    vis[r]=true;

    curr+=get(l,r);
    int node;
    if (l==r) node=parent(l);
    else{
      node=parent(l+1);
      p[parent(l)]=node;
      p[parent(r)]=node;
      range[node]=ii(l,r);
    }

    if (vis[r+2]){
      int temp=parent(r+2);

      p[temp]=node;
      range[node]=merge(range[node],range[temp]);
    }
    if (l>1 && vis[l-2]){
      int temp=parent(l-2);

      p[temp]=node;
      range[node]=merge(range[node],range[temp]);
    }

    l=range[node].fi,r=range[node].se;
    if (l!=1 && r!=n){
      pq.push(iii(get(l-1,r+1),ii(l-1,r+1))); 
    }

    cout<<curr<<endl;
  }
}

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 620 KB Output is correct
2 Correct 2 ms 620 KB Output is correct
3 Correct 2 ms 620 KB Output is correct
4 Correct 2 ms 620 KB Output is correct
5 Correct 2 ms 620 KB Output is correct
6 Correct 2 ms 620 KB Output is correct
7 Correct 2 ms 620 KB Output is correct
8 Correct 2 ms 620 KB Output is correct
9 Correct 2 ms 620 KB Output is correct
10 Correct 2 ms 620 KB Output is correct
11 Correct 2 ms 620 KB Output is correct
12 Correct 2 ms 620 KB Output is correct
13 Correct 2 ms 620 KB Output is correct
14 Correct 2 ms 620 KB Output is correct
15 Correct 2 ms 640 KB Output is correct
16 Correct 2 ms 620 KB Output is correct
17 Correct 2 ms 620 KB Output is correct
18 Correct 2 ms 620 KB Output is correct
19 Correct 2 ms 620 KB Output is correct
20 Correct 2 ms 620 KB Output is correct

Subtask #2
92.0 / 92.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 620 KB Output is correct
2 Correct 2 ms 620 KB Output is correct
3 Correct 2 ms 620 KB Output is correct
4 Correct 2 ms 620 KB Output is correct
5 Correct 2 ms 620 KB Output is correct
6 Correct 2 ms 620 KB Output is correct
7 Correct 2 ms 620 KB Output is correct
8 Correct 2 ms 620 KB Output is correct
9 Correct 2 ms 620 KB Output is correct
10 Correct 2 ms 620 KB Output is correct
11 Correct 2 ms 620 KB Output is correct
12 Correct 2 ms 620 KB Output is correct
13 Correct 2 ms 620 KB Output is correct
14 Correct 2 ms 620 KB Output is correct
15 Correct 2 ms 640 KB Output is correct
16 Correct 2 ms 620 KB Output is correct
17 Correct 2 ms 620 KB Output is correct
18 Correct 2 ms 620 KB Output is correct
19 Correct 2 ms 620 KB Output is correct
20 Correct 2 ms 620 KB Output is correct
21 Correct 164 ms 15824 KB Output is correct
22 Correct 149 ms 15952 KB Output is correct
23 Correct 156 ms 15952 KB Output is correct
24 Correct 109 ms 15696 KB Output is correct
25 Correct 111 ms 15696 KB Output is correct
26 Correct 115 ms 15696 KB Output is correct
27 Correct 119 ms 15824 KB Output is correct
28 Correct 118 ms 15824 KB Output is correct
29 Correct 118 ms 15824 KB Output is correct
30 Correct 129 ms 15824 KB Output is correct
31 Correct 124 ms 15824 KB Output is correct
32 Correct 125 ms 15952 KB Output is correct
33 Correct 140 ms 15824 KB Output is correct
34 Correct 153 ms 15648 KB Output is correct
35 Correct 133 ms 15696 KB Output is correct
36 Correct 155 ms 15824 KB Output is correct
37 Correct 149 ms 15824 KB Output is correct
38 Correct 164 ms 15952 KB Output is correct
39 Correct 112 ms 15836 KB Output is correct
40 Correct 124 ms 15696 KB Output is correct
41 Correct 105 ms 15696 KB Output is correct
42 Correct 120 ms 16080 KB Output is correct
43 Correct 121 ms 15876 KB Output is correct
44 Correct 123 ms 15824 KB Output is correct
45 Correct 123 ms 15964 KB Output is correct
46 Correct 134 ms 15824 KB Output is correct
47 Correct 124 ms 15824 KB Output is correct
48 Correct 131 ms 15696 KB Output is correct
49 Correct 130 ms 15696 KB Output is correct
50 Correct 134 ms 15696 KB Output is correct