Submission #941879

#	Time	Username	Problem	Language	Result	Execution time	Memory
941879		Tuanlinh123	Treatment Project (JOI20_treatment)	C++17	0 / 100	2247 ms	183076 KiB

treatment

#include<bits/stdc++.h>
#define ll int
#define pll pair<long long, ll>
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define ld long double
#define sz(a) ((ll)(a).size())
using namespace std;

const ll maxn=100005;
const long long inf=1e18;

struct seg
{
    ll id, type, x, y;
    seg(){}
    seg(ll id, ll type, ll x, ll y): id(id), type(type), x(x), y(y){}

    bool operator < (const seg &o) const
    {
        if (x!=o.x) return x<o.x;
        if (type!=o.type) return type<o.type;
        return y<o.y;
    }
};

vector <seg> p;
vector <ll> A[maxn*40];
long long dis[maxn*40];
ll x[maxn], l[maxn], r[maxn], w[maxn];

namespace SegTree
{
    ll n, crr, St[maxn*4]={};
    void init(ll sz, ll m) {n=sz, crr=m;}

    void update(ll i, ll Start, ll End, ll idx, ll val)
    {
        if (Start>idx || End<idx) return;
        if (Start==End) {A[val].pb(St[i]), St[i]=val; return;}
        ll mid=(Start+End)/2;
        A[++crr].pb(St[i]), St[i]=crr;
        if (idx<=mid) update(i*2, Start, mid, idx, val);
        else update(i*2+1, mid+1, End, idx, val);
        A[St[i]].pb(St[i*2]), A[St[i]].pb(St[i*2+1]);
    }
    void update(ll idx, ll val){update(1, 1, n, idx, val);}

    void query(ll i, ll Start, ll End, ll l, ll r, ll val)
    {
        if (Start>r || End<l) return;
        if (Start>=l && End<=r) {A[val].pb(St[i]); return;}
        ll mid=(Start+End)/2;
        if (mid>=l) query(i*2, Start, mid, l, r, val);
        if (mid+1<=r) query(i*2+1, mid+1, End, l, r, val);
    }
    void query(ll l, ll r, ll val){query(1, 1, n, l, r, val);}
}


int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    ll n, m; cin >> n >> m;
    for (ll i=1; i<=m; i++)
    {
        cin >> x[i] >> l[i] >> r[i] >> w[i];
        p.emplace_back(i, 0, x[i]+l[i], l[i]-x[i]);
        p.emplace_back(i, 1, x[i]+r[i]+1, r[i]+1-x[i]);
    }
    vector <ll> cx, cy;
    for (seg &s:p) cx.pb(s.x), cy.pb(s.y);
    sort(cx.begin(), cx.end());
    cx.resize(unique(cx.begin(), cx.end())-cx.begin());
    sort(cy.begin(), cy.end());
    cy.resize(unique(cy.begin(), cy.end())-cy.begin());
    for (seg &s: p)
    {
        s.x=lower_bound(cx.begin(), cx.end(), s.x)-cx.begin()+1;
        s.y=lower_bound(cy.begin(), cy.end(), s.y)-cy.begin()+1;
    }
    sort(p.begin(), p.end());
    SegTree::init(sz(cy), m);
    for (seg &s: p)
    {
        ll id=s.id, t=s.type, p=s.y;
        if (!t) SegTree::update(p, id);
        else SegTree::query(1, p, id);
    }
    ll k=SegTree::crr;
    priority_queue <pll, vector <pll>, greater<pll>> q;
    for (ll i=1; i<=k; i++)
    {
        if (i<=m && l[i]==1) dis[i]=w[i], q.push({dis[i], i});
        else dis[i]=inf;   
    }
    while (!q.empty())
    {
        ll u=q.top().se, disu=q.top().fi; q.pop();
        if (dis[u]!=disu) continue;
        for (ll v:A[u])
            if (dis[v]>disu+(v<=m?w[v]:0))
                dis[v]=disu+(v<=m?w[v]:0), q.push({dis[v], v});
    }
    long long ans=inf;
    for (ll i=1; i<=m; i++)
        if (r[i]==n) ans=min(ans, dis[i]);
    if (ans==inf) cout << "-1";
    else cout << ans;
}

• Subtask 1: 0 / 4
• Subtask 2: 0 / 5
• Subtask 3: 0 / 30
• Subtask 4: 0 / 61