oj.uz

답안 #993558

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
993558 2024-06-06T04:57:14 Z imarn 3단 점프 (JOI19_jumps) C++14
100 / 100
 730 ms 77492 KB 
#include<bits/stdc++.h>
#define ll long long
#define pii pair<ll,ll>
#define f first
#define s second
#define pb push_back
#define all(x) x.begin(),x.end()
using namespace std;
const int mxn=5e5+5;
int a[mxn];
struct node{
    int mx,mxf,mxa;
    node operator+(node b){
        node rs;
        rs.mx=max({mx,b.mx,mxf+b.mxa});
        rs.mxf=max(mxf,b.mxf);
        rs.mxa=max(mxa,b.mxa);
        return rs;
    }
}t[4*mxn];
void build(int i,int l,int r){
    if(l==r)return void(t[i]={0,0,a[l]});
    int m=(l+r)>>1;build(2*i,l,m);build(2*i+1,m+1,r);
    t[i]=t[2*i]+t[2*i+1];
}
void update(int i,int l,int r,int idx,int v){
    if(r<idx||l>idx)return;
    if(l==r){
        t[i].mxf=max(t[i].mxf,v);
        t[i].mx=t[i].mxf+t[i].mxa;
        return;
    }int m=(l+r)>>1;update(2*i,l,m,idx,v);update(2*i+1,m+1,r,idx,v);
    t[i]=t[2*i]+t[2*i+1];
}
node query(int i,int l,int r,int tl,int tr){
    if(r<tl||l>tr)return {0,0,0};
    if(r<=tr&&l>=tl)return t[i];
    int m=(l+r)>>1;
    return query(2*i,l,m,tl,tr)+query(2*i+1,m+1,r,tl,tr);
}
int main(){
    ios_base::sync_with_stdio(0);cin.tie(0);
    int n;cin>>n;
    for(int i=1;i<=n;i++)cin>>a[i];
    stack<int>st;vector<pii>gd;
    for(int i=1;i<=n;i++){
        while(!st.empty()&&a[st.top()]<=a[i])gd.pb({st.top(),i}),st.pop();
        if(!st.empty())gd.pb({st.top(),i});st.push(i);
    }int id=0;build(1,1,n);
    int q;cin>>q;int ans[q+1];
    vector<pii>qr[n+1];
    for(int i=1;i<=q;i++){
        int l,r;cin>>l>>r;
        qr[l].pb({r,i});
    }sort(gd.rbegin(),gd.rend());
    for(int l=n;l>=1;l--){
        while(id<gd.size()&&gd[id].f>=l){id++;
            int idx=gd[id-1].s*2-gd[id-1].f;
            if(idx>n){continue;}
            update(1,1,n,idx,a[gd[id-1].f]+a[gd[id-1].s]);
        }
        for(auto it : qr[l]){
            ans[it.s]=query(1,1,n,l,it.f).mx;
        }
    }for(int i=1;i<=q;i++)cout<<ans[i]<<'\n';
}

Compilation message

jumps.cpp: In function 'int main()':
jumps.cpp:48:9: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   48 |         if(!st.empty())gd.pb({st.top(),i});st.push(i);
      |         ^~
jumps.cpp:48:44: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   48 |         if(!st.empty())gd.pb({st.top(),i});st.push(i);
      |                                            ^~
jumps.cpp:57:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   57 |         while(id<gd.size()&&gd[id].f>=l){id++;
      |               ~~^~~~~~~~~~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 0 ms 2396 KB Output is correct
6 Correct 0 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 0 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 0 ms 2396 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 0 ms 2396 KB Output is correct
6 Correct 0 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 0 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 0 ms 2396 KB Output is correct
11 Correct 221 ms 25300 KB Output is correct
12 Correct 224 ms 25112 KB Output is correct
13 Correct 219 ms 25300 KB Output is correct
14 Correct 216 ms 25304 KB Output is correct
15 Correct 214 ms 25244 KB Output is correct
16 Correct 226 ms 24792 KB Output is correct
17 Correct 237 ms 24792 KB Output is correct
18 Correct 226 ms 24536 KB Output is correct
19 Correct 221 ms 25048 KB Output is correct

Subtask #3
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 104 ms 21196 KB Output is correct
2 Correct 54 ms 16584 KB Output is correct
3 Correct 50 ms 17392 KB Output is correct
4 Correct 106 ms 21180 KB Output is correct
5 Correct 117 ms 19908 KB Output is correct
6 Correct 103 ms 20452 KB Output is correct
7 Correct 104 ms 21696 KB Output is correct
8 Correct 99 ms 19912 KB Output is correct
9 Correct 101 ms 20684 KB Output is correct

Subtask #4
54.0 / 54.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 0 ms 2396 KB Output is correct
6 Correct 0 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 0 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 0 ms 2396 KB Output is correct
11 Correct 221 ms 25300 KB Output is correct
12 Correct 224 ms 25112 KB Output is correct
13 Correct 219 ms 25300 KB Output is correct
14 Correct 216 ms 25304 KB Output is correct
15 Correct 214 ms 25244 KB Output is correct
16 Correct 226 ms 24792 KB Output is correct
17 Correct 237 ms 24792 KB Output is correct
18 Correct 226 ms 24536 KB Output is correct
19 Correct 221 ms 25048 KB Output is correct
20 Correct 104 ms 21196 KB Output is correct
21 Correct 54 ms 16584 KB Output is correct
22 Correct 50 ms 17392 KB Output is correct
23 Correct 106 ms 21180 KB Output is correct
24 Correct 117 ms 19908 KB Output is correct
25 Correct 103 ms 20452 KB Output is correct
26 Correct 104 ms 21696 KB Output is correct
27 Correct 99 ms 19912 KB Output is correct
28 Correct 101 ms 20684 KB Output is correct
29 Correct 719 ms 71132 KB Output is correct
30 Correct 558 ms 66352 KB Output is correct
31 Correct 554 ms 68412 KB Output is correct
32 Correct 730 ms 74672 KB Output is correct
33 Correct 682 ms 74156 KB Output is correct
34 Correct 719 ms 71852 KB Output is correct
35 Correct 672 ms 71448 KB Output is correct
36 Correct 670 ms 71344 KB Output is correct
37 Correct 671 ms 73136 KB Output is correct
38 Correct 561 ms 76716 KB Output is correct
39 Correct 556 ms 76464 KB Output is correct
40 Correct 539 ms 73392 KB Output is correct
41 Correct 534 ms 72720 KB Output is correct
42 Correct 518 ms 72812 KB Output is correct
43 Correct 543 ms 74512 KB Output is correct
44 Correct 590 ms 76780 KB Output is correct
45 Correct 594 ms 77492 KB Output is correct
46 Correct 570 ms 73648 KB Output is correct
47 Correct 586 ms 73268 KB Output is correct
48 Correct 591 ms 73816 KB Output is correct
49 Correct 574 ms 75436 KB Output is correct
50 Correct 637 ms 77080 KB Output is correct
51 Correct 626 ms 76976 KB Output is correct
52 Correct 625 ms 74672 KB Output is correct
53 Correct 599 ms 74852 KB Output is correct
54 Correct 627 ms 74156 KB Output is correct
55 Correct 620 ms 76172 KB Output is correct