Submission #1179583

#	Time	Username	Problem	Language	Result	Execution time	Memory
1179583		Zbyszek99	Foehn Phenomena (JOI17_foehn_phenomena)	C++20	100 / 100	278 ms	7244 KiB

foehn_phenomena

#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define ff first
#define ss second
#define vl vector<long long>
#define vi vector<int>
#define pii pair<int,int>
#define pll pair<long long, long long>
#define pb push_back
#define rep(i, b) for(int i = 0; i < (b); ++i)
#define rep2(i,a,b) for(int i = a; i <= (b); ++i)
#define rep3(i,a,b,c) for(int i = a; i <= (b); i+=c)
#define count_bits(x) __builtin_popcountll((x))
#define all(x) (x).begin(),(x).end()
#define siz(x) (int)(x).size()
#define forall(it,x) for(auto& it:(x))
using namespace std;
//mt19937 mt;void random(){mt.seed(chrono::time_point_cast<chrono::milliseconds>(chrono::high_resolution_clock::now()).time_since_epoch().count());}
//ll rand(ll a, ll b) {return a + (mt() % (b-a+1));}
const int INF = 1e9+50;
const ll INF_L = 1e18+40;
const ll MOD = 1e9+7;

const int tree_siz = 1024*512-1;
ll drzewo[tree_siz];

void add_seg(int akt, int p1, int p2, int s1, int s2, ll w)
{
    if(p2 < s1 || p1 > s2) return;
    if(p1 >= s1 && p2 <= s2)
    {
        drzewo[akt] += w;
        return;
    }
    add_seg(akt*2,p1,(p1+p2)/2,s1,s2,w);
    add_seg(akt*2+1,(p1+p2)/2+1,p2,s1,s2,w);
}

ll get_val(int v)
{
    return drzewo[v] + (v != 1 ? get_val(v/2) : 0);
}

int n,q;
ll s,t;
ll cur_ans = 0;

void change(ll a, ll b, ll p = 1)
{
    if(b > a) cur_ans -= p*(b-a) * s;
    else cur_ans += p*(a-b)*t;
}

int main()
{
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    //random();
    cin >> n >> q >> s >> t;
    ll prev = 0;
    rep(i,n+1)
    {
        ll a;
        cin >> a;
        add_seg(1,0,tree_siz/2,i,i,a);
        if(i != 0)
        {
            change(prev,a);
        }
        prev = a;
    }
    rep(i,q)
    {
        int l,r;
        ll x;
        cin >> l >> r >> x;        
        change(get_val(tree_siz/2+l),get_val(tree_siz/2+l+1),-1);
        if(r != n) change(get_val(tree_siz/2+r+1),get_val(tree_siz/2+r+2),-1);
        add_seg(1,0,tree_siz/2,l,r,x);
        change(get_val(tree_siz/2+l),get_val(tree_siz/2+l+1),1);
        if(r != n) change(get_val(tree_siz/2+r+1),get_val(tree_siz/2+r+2),1);
        cout << cur_ans << "\n";
    }
}

• Subtask 1: 30 / 30
• Subtask 2: 10 / 10
• Subtask 3: 60 / 60