oj.uz

답안 #1035442

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1035442 2024-07-26T11:11:47 Z imarn 3단 점프 (JOI19_jumps) C++14
100 / 100
 652 ms 67764 KB 
#include<bits/stdc++.h>
#define ll long long
#define pb push_back
#define pii pair<int,int>
#define f first
#define s second
#define all(x) x.begin(),x.end()
#define ub(a,b) upper_bound(a.begin(),a.end(),b)-a.begin();
#define lb(a,b) lower_bound(a.begin(),a.end(),b)-a.begin();
#define vi vector<int>
#define vll vector<ll>
#define pll pair<ll,ll>
#define sz(x) x.size()
using namespace std;
const int mxn=5e5+5;
int a[mxn]{0};
struct node{
    int mx1,mx2,mx;
    node operator+(node b){
        return {max(mx1,b.mx1),max(mx2,b.mx2),max({mx,b.mx,mx2+b.mx1})};
    }
}t[4*mxn];
void build(int i,int l,int r){
    if(l==r)return void(t[i]={a[l],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].mx2=max(t[i].mx2,v);
        t[i].mx=t[i].mx1+t[i].mx2;
        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);
    }sort(gd.rbegin(),gd.rend());
    vector<pii>qr[n+1];int q;cin>>q;int ans[q+1];
    for(int i=1;i<=q;i++){
        int l,r;cin>>l>>r;
        qr[l].pb({r,i});
    }int idx=0;build(1,1,n);
    for(int l=n;l>=1;l--){
        while(idx<gd.size()&&gd[idx].f>=l){
            if(2*gd[idx].s-gd[idx].f>n){idx++;continue;}
            update(1,1,n,2*gd[idx].s-gd[idx].f,a[gd[idx].f]+a[gd[idx].s]);
            idx++;
        }
        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:50:9: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   50 |         if(!st.empty())gd.pb({st.top(),i});st.push(i);
      |         ^~
jumps.cpp:50:44: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   50 |         if(!st.empty())gd.pb({st.top(),i});st.push(i);
      |                                            ^~
jumps.cpp:58:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   58 |         while(idx<gd.size()&&gd[idx].f>=l){
      |               ~~~^~~~~~~~~~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 360 KB Output is correct
10 Correct 0 ms 348 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 360 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 213 ms 19284 KB Output is correct
12 Correct 222 ms 19284 KB Output is correct
13 Correct 204 ms 19364 KB Output is correct
14 Correct 199 ms 19280 KB Output is correct
15 Correct 205 ms 19352 KB Output is correct
16 Correct 217 ms 18772 KB Output is correct
17 Correct 198 ms 18772 KB Output is correct
18 Correct 186 ms 18772 KB Output is correct
19 Correct 186 ms 19284 KB Output is correct

Subtask #3
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 94 ms 17080 KB Output is correct
2 Correct 50 ms 15296 KB Output is correct
3 Correct 50 ms 16152 KB Output is correct
4 Correct 88 ms 17096 KB Output is correct
5 Correct 91 ms 17092 KB Output is correct
6 Correct 88 ms 16324 KB Output is correct
7 Correct 87 ms 16316 KB Output is correct
8 Correct 100 ms 16320 KB Output is correct
9 Correct 95 ms 16584 KB Output is correct

Subtask #4
54.0 / 54.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 360 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 213 ms 19284 KB Output is correct
12 Correct 222 ms 19284 KB Output is correct
13 Correct 204 ms 19364 KB Output is correct
14 Correct 199 ms 19280 KB Output is correct
15 Correct 205 ms 19352 KB Output is correct
16 Correct 217 ms 18772 KB Output is correct
17 Correct 198 ms 18772 KB Output is correct
18 Correct 186 ms 18772 KB Output is correct
19 Correct 186 ms 19284 KB Output is correct
20 Correct 94 ms 17080 KB Output is correct
21 Correct 50 ms 15296 KB Output is correct
22 Correct 50 ms 16152 KB Output is correct
23 Correct 88 ms 17096 KB Output is correct
24 Correct 91 ms 17092 KB Output is correct
25 Correct 88 ms 16324 KB Output is correct
26 Correct 87 ms 16316 KB Output is correct
27 Correct 100 ms 16320 KB Output is correct
28 Correct 95 ms 16584 KB Output is correct
29 Correct 599 ms 62132 KB Output is correct
30 Correct 496 ms 58156 KB Output is correct
31 Correct 526 ms 60168 KB Output is correct
32 Correct 592 ms 62132 KB Output is correct
33 Correct 571 ms 62132 KB Output is correct
34 Correct 571 ms 59828 KB Output is correct
35 Correct 613 ms 59572 KB Output is correct
36 Correct 637 ms 59336 KB Output is correct
37 Correct 652 ms 60912 KB Output is correct
38 Correct 503 ms 67760 KB Output is correct
39 Correct 473 ms 67764 KB Output is correct
40 Correct 458 ms 64436 KB Output is correct
41 Correct 471 ms 63924 KB Output is correct
42 Correct 459 ms 63956 KB Output is correct
43 Correct 478 ms 65524 KB Output is correct
44 Correct 517 ms 66996 KB Output is correct
45 Correct 493 ms 66996 KB Output is correct
46 Correct 475 ms 63920 KB Output is correct
47 Correct 499 ms 63640 KB Output is correct
48 Correct 523 ms 63456 KB Output is correct
49 Correct 517 ms 65712 KB Output is correct
50 Correct 559 ms 65236 KB Output is correct
51 Correct 537 ms 65188 KB Output is correct
52 Correct 502 ms 62640 KB Output is correct
53 Correct 538 ms 62612 KB Output is correct
54 Correct 495 ms 62388 KB Output is correct
55 Correct 542 ms 64180 KB Output is correct