Submission #944153

#	Time	Username	Problem	Language	Result	Execution time	Memory
944153		beepbeepsheep	Triple Jump (JOI19_jumps)	C++17	5 / 100	1270 ms	332500 KiB

jumps

#include <bits/stdc++.h>
using namespace std;

#define ll int
#define ii pair<ll,ll>
#ifndef DEBUG
#define cerr if (0) cerr
#define endl '\n'
#endif

const ll maxn=5005;
const ll inf=1e15;
ll arr[maxn];
struct node{
    ll s,e,m,val;
    node *l,*r;
    node (ll _s, ll _e){
        s=_s,e=_e,m=(s+e)>>1,val=0;
        if (s!=e) l=new node(s,m),r=new node(m+1,e);
    }
    void upd(ll x, ll v){
        if (s==e){
            val=max(v,val);
            return;
        }
        if (x>m) r->upd(x,v);
        else l->upd(x,v);
        val=max(l->val,r->val);
    }
    ll query(ll x, ll y){
        if (x<=s && e<=y) return val;
        if (x>m) return r->query(x,y);
        if (y<=m) return l->query(x,y);
        return max(l->query(x,y),r->query(x,y));
    }
}*root,*rmq;
ll n;
vector<tuple<ll,ll,ll>> v,q;
ll ans[maxn];
int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cin>>n;
    root=new node(1,n);
    for (int i=1;i<=n;i++) cin>>arr[i],root->upd(i,arr[i]);
    for (int i=1;i<=n;i++){
        for (int j=i+2;j<=n;j++){
            v.emplace_back(i,j,arr[i]+arr[j]+
                           root->query(i+1,(i+j)>>1));
            //cerr<<i<<' '<<j<<' '<<arr[i]+arr[j]+root->query(i+1,(i+j)>>1)<<endl;
        }
    }
    sort(v.rbegin(),v.rend());
    rmq=new node(1,n);
    ll qu,l,r;
    cin>>qu;
    for (int i=1;i<=qu;i++){
        cin>>l>>r;
        q.emplace_back(l,r,i);
    }
    sort(q.rbegin(),q.rend());
    ll ptr=0;
    for (auto [l,r,i]:q){
        while (ptr!=v.size() && l<=get<0>(v[ptr])){
            rmq->upd(get<1>(v[ptr]),get<2>(v[ptr]));
            ptr++;
        }
        ans[i]=rmq->query(l,r);
    }
    for (int i=1;i<=qu;i++){
        cout<<ans[i]<<endl;
    }
    return 0;
}

Compilation message (stderr)

jumps.cpp:12:14: warning: overflow in conversion from 'double' to 'int' changes value from '1.0e+15' to '2147483647' [-Woverflow]
   12 | const ll inf=1e15;
      |              ^~~~
jumps.cpp: In function 'int main()':
jumps.cpp:64:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::tuple<int, int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   64 |         while (ptr!=v.size() && l<=get<0>(v[ptr])){
      |                ~~~^~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 0 / 14
• Subtask 3: 0 / 27
• Subtask 4: 0 / 54