Submission #1103788

#	Time	Username	Problem	Language	Result	Execution time	Memory
1103788		hahahoang132	Fish 3 (JOI24_fish3)	C++17	0 / 100	388 ms	49004 KiB

Main

//ahussssssssssss
#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define bit(x,y) ((x >> y) & 1LL)
const ll N = 3e5 + 5;
const ll mod = 1e9 + 7;
const ll inf = LLONG_MAX/4;
struct segtree
{
    ll n;
    ll b[N * 4],sz[N * 4],lz[N * 4];
    void build(ll n)
    {
        this->n = n;
        build(0,1,n);
    }
    void build(ll x, ll l, ll r)
    {
        if(l == r)
        {
            b[x] = lz[x] = 0;
            sz[x] = 1;
        }else
        {
            ll mid = (l + r) / 2;
            build(x * 2 + 1,l,mid);
            build(x * 2 + 2,mid + 1,r);
            sz[x] = sz[x * 2 + 1] + sz[x * 2 + 2];
        }
    }
    void udt(ll l, ll r, ll add)
    {
        udt(0,1,n,l,r,add);
    }
    void push(ll x)
    {
        ll x1 = x * 2 + 1;
        ll x2 = x1 + 1;
        b[x1] += lz[x] * sz[x1];
        b[x2] += lz[x] * sz[x2];
        lz[x1] += lz[x];
        lz[x2] += lz[x];
        lz[x] = 0;
    }
    void udt(ll x, ll l, ll r, ll s, ll e, ll add)
    {
        if(e < l || r < s) return;
        if(s <= l && r <= e)
        {
            b[x] += sz[x] * add;
            lz[x] += add;
            return;
        }
        push(x);
        ll mid = (l + r) / 2;
        udt(x * 2 + 1,l,mid,s,e,add);
        udt(x * 2 + 2,mid + 1,r,s,e,add);
        b[x] = b[x * 2 + 1] + b[x * 2 + 2];
    }
    ll get(ll x)
    {
        return get(x,x);
    }
    ll get(ll l, ll r)
    {
        return get(0,1,n,l,r);
    }
    ll get(ll x, ll l, ll r, ll s, ll e)
    {
        if(e < l || r < s) return 0;
        if(s <= l && r <= e) return b[x];
        push(x);
        ll mid = (l + r) / 2;
        return get(x * 2 + 1,l,mid,s,e) + get(x * 2 + 2,mid + 1,r,s,e);
    }
};
segtree f;
ll a[N];
vector<pair<ll,ll>> qr[N];
ll ans[N];
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    ll n,d;
    cin >> n >> d;
    f.build(n);
    ll i,j;
    for(i = 1;i <= n;i++)
    {
        cin >> a[i];
    }
    ll q;
    cin >> q;
    for(i = 1;i <= q;i++)
    {
        ll l,r;
        cin >> l >> r;
        qr[r].push_back({l,i});
    }
    vector<pair<ll,ll>> sus;
    for(i = 1;i <= n;i++)
    {
        ll hehe = i;
        while(!sus.empty())
        {
            ll s = sus.back().first;
            ll e = sus.back().second;
            sus.pop_back();
            ll t1 = a[e] - d * f.get(e);
            ll t2 = a[e + 1] - d * f.get(e + 1);
            if(t1 <= t2) break;
            ll t = t1 - t2;
            ll add = t / d;
            if(t % d != 0) add++;
            f.udt(s,e,add);
            hehe = s;
        }
        sus.push_back({hehe,i});
        for(auto tmp : qr[i])
        {
            if(d * f.get(tmp.first) > a[tmp.first]) ans[tmp.second] = -1;
            else ans[tmp.second] = f.get(tmp.first,i);
        }
    }
    for(i = 1;i <= q;i++) cout << ans[i] << "\n";
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:89:10: warning: unused variable 'j' [-Wunused-variable]
   89 |     ll i,j;
      |          ^

• Subtask 1: 0 / 9
• Subtask 2: 0 / 7
• Subtask 3: 0 / 28
• Subtask 4: 0 / 20
• Subtask 5: 0 / 36