Submission #941903

#TimeUsernameProblemLanguageResultExecution timeMemory
941903Tuanlinh123Treatment Project (JOI20_treatment)C++17
35 / 100
472 ms376364 KiB
#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[++crr].pb(St[i]), St[i]=crr, A[St[i]].pb(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), A[St[i]].pb(St[i*2]); else update(i*2+1, mid+1, End, idx, val), 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); } // for (ll i=0; i<sz(p); i++) // for (ll j=0; j<i; j++) // if (p[j].type==0 && p[i].type==1 && p[i].x>=p[j].x && p[i].y>=p[j].y) // A[p[i].id].pb(p[j].id); ll k=SegTree::crr; // for (ll i=1; i<=k; i++) // for (ll j:A[i]) // if (j) cout << i << " " << j << "\n"; 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()) { long long 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; }
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