oj.uz

Submission #751229

# Submission time Handle Problem Language Result Execution time Memory
751229 2023-05-31T08:35:32 Z bgnbvnbv Index (COCI21_index) C++14
110 / 110
 2272 ms 23608 KB 
#include<bits/stdc++.h>
#define pli pair<long long,long long>
using namespace std;
using ll=long long;
const ll maxN=3e5+5;
ll n, a[maxN],id[maxN],st[4*maxN];
void build(ll id, ll l, ll r)
{
    if(l==r)
    {
        st[id]=0;
        return;
    }
    ll mid=(l+r)/2;
    build(id*2,l,mid);
    build(id*2+1,mid+1,r);
    st[id]=st[id*2]+st[id*2+1];
}
void update(ll id, ll l, ll r, ll pos, ll val)
{
    if(pos<l||pos>r) return;
    if(l==r)
    {
        st[id]=val;
        return;
    }
    ll mid=(l+r)/2;
    update(id*2,l,mid,pos,val);
    update(id*2+1,mid+1,r,pos,val);
    st[id]=st[id*2]+st[id*2+1];
}
ll get(ll id, ll l, ll r, ll i, ll j)
{
    if(r<i||j<l) return 0;
    if(i<=l&&r<=j)
    {
        return st[id];
    }
    ll mid=(l+r)/2;
    return get(id*2,l,mid,i,j)+get(id*2+1,mid+1,r,i,j);
}
bool lf(ll x, ll y)
{
    return a[x]>a[y];
}
struct TQuery
{
    ll l, r, mid, low, high;
}q[maxN];
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    int que;
    cin >> n>> que;
    for(int i=1;i<=n;i++) cin >> a[i],id[i]=i;
    sort(id+1,id+n+1,lf);
    //for(int i=1;i<=n;i++) cout << id[i]<<' ';
    for(int i=1;i<=que;i++)
    {
        cin >> q[i].l >> q[i].r;
        q[i].low=1;
        q[i].high=q[i].r-q[i].l+1;
    }
    vector<pli> v;
    while(true)
    {
        v.clear();
        build(1,1,n);
        for(int i=1;i<=que;i++)
        {
            if(q[i].low>q[i].high)
            {
                continue;
            }
            else
            {
                q[i].mid=(q[i].low+q[i].high)/2;
                v.push_back({q[i].mid,i});
            }
        }
        if(v.size()==0) break;
        sort(v.begin(),v.end(),greater<pli>());
        int j=1;
        for(int i=0;i<v.size();i++)
        {
            while(a[id[j]]>=v[i].first)
            {
                update(1,1,n,id[j],1);
                j++;
            }
            ll idx=v[i].second;
            ll x=get(1,1,n,q[idx].l,q[idx].r);
            if(x>=q[idx].mid) q[idx].low=q[idx].mid+1;
            else q[idx].high=q[idx].mid-1;

        }
    }
    for(int i=1;i<=que;i++)
    {
        cout << q[i].high<<'\n';
    }
}

Compilation message

index.cpp: In function 'int main()':
index.cpp:85:22: 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]
   85 |         for(int i=0;i<v.size();i++)
      |                     ~^~~~~~~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 468 KB Output is correct
2 Correct 3 ms 468 KB Output is correct
3 Correct 4 ms 468 KB Output is correct
4 Correct 4 ms 468 KB Output is correct
5 Correct 4 ms 468 KB Output is correct
6 Correct 4 ms 464 KB Output is correct
7 Correct 4 ms 468 KB Output is correct
8 Correct 4 ms 468 KB Output is correct
9 Correct 4 ms 468 KB Output is correct
10 Correct 4 ms 468 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 468 KB Output is correct
2 Correct 3 ms 468 KB Output is correct
3 Correct 4 ms 468 KB Output is correct
4 Correct 4 ms 468 KB Output is correct
5 Correct 4 ms 468 KB Output is correct
6 Correct 4 ms 464 KB Output is correct
7 Correct 4 ms 468 KB Output is correct
8 Correct 4 ms 468 KB Output is correct
9 Correct 4 ms 468 KB Output is correct
10 Correct 4 ms 468 KB Output is correct
11 Correct 412 ms 6108 KB Output is correct
12 Correct 390 ms 6104 KB Output is correct
13 Correct 383 ms 6104 KB Output is correct
14 Correct 385 ms 6216 KB Output is correct
15 Correct 400 ms 6100 KB Output is correct
16 Correct 384 ms 6108 KB Output is correct
17 Correct 416 ms 6104 KB Output is correct
18 Correct 392 ms 6216 KB Output is correct
19 Correct 378 ms 6100 KB Output is correct
20 Correct 379 ms 6108 KB Output is correct

Subtask #3
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 468 KB Output is correct
2 Correct 3 ms 468 KB Output is correct
3 Correct 4 ms 468 KB Output is correct
4 Correct 4 ms 468 KB Output is correct
5 Correct 4 ms 468 KB Output is correct
6 Correct 4 ms 464 KB Output is correct
7 Correct 4 ms 468 KB Output is correct
8 Correct 4 ms 468 KB Output is correct
9 Correct 4 ms 468 KB Output is correct
10 Correct 4 ms 468 KB Output is correct
11 Correct 412 ms 6108 KB Output is correct
12 Correct 390 ms 6104 KB Output is correct
13 Correct 383 ms 6104 KB Output is correct
14 Correct 385 ms 6216 KB Output is correct
15 Correct 400 ms 6100 KB Output is correct
16 Correct 384 ms 6108 KB Output is correct
17 Correct 416 ms 6104 KB Output is correct
18 Correct 392 ms 6216 KB Output is correct
19 Correct 378 ms 6100 KB Output is correct
20 Correct 379 ms 6108 KB Output is correct
21 Correct 2245 ms 23536 KB Output is correct
22 Correct 2165 ms 23556 KB Output is correct
23 Correct 2169 ms 23532 KB Output is correct
24 Correct 2199 ms 23536 KB Output is correct
25 Correct 2134 ms 23528 KB Output is correct
26 Correct 2272 ms 23532 KB Output is correct
27 Correct 2242 ms 23596 KB Output is correct
28 Correct 2255 ms 23528 KB Output is correct
29 Correct 2243 ms 23532 KB Output is correct
30 Correct 2206 ms 23608 KB Output is correct