Submission #975568

#TimeUsernameProblemLanguageResultExecution timeMemory
975568PM1Pinball (JOI14_pinball)C++17
0 / 100
1 ms6608 KiB
#include <bits/stdc++.h> using namespace std; #define ll long long const int mxn=1e5+5,sz=(1<<19); ll n,m,g[mxn][4]; vector<int>v; struct segment{ ll mn[sz]; void up(int id,int L,int R,int l,ll x,bool w){ if(L+1==R){ if(w==1 || mn[id]>x){ mn[id]=x; } return; } int mid=(L+R)/2; if(l<mid) up(id*2,L,mid,l,x,w); else up(id*2+1,mid,R,l,x,w); if(mn[id*2]<mn[id*2+1]) mn[id]=mn[id*2]; else mn[id]=mn[id*2+1]; } ll get(int id,int L,int R,int l,int r){ if(L==l && R==r){ return mn[id]; } ll x1=1e16,x2=1e16; int mid=(L+R)/2; if(l<mid) x1=get(id*2,L,mid,l,min(r,mid)); if(r>mid) x2=get(id*2+1,mid,R,max(l,mid),r); return min(x1,x2); } }seg[3]; int main(){ ios::sync_with_stdio(false); cin.tie(0); cout.tie(0); cin>>m>>n; for(int i=1;i<=m;i++){ for(int j=0;j<3;j++){ cin>>g[i][j]; v.push_back(g[i][j]); } cin>>g[i][3]; } sort(v.begin(),v.end()); v.resize(unique(v.begin(),v.end())-v.begin()); for(int i=1;i<=m;i++){ for(int j=0;j<3;j++){ int x=lower_bound(v.begin(),v.end(),g[i][j])-v.begin(); g[i][j]=x; } } if(v.back()!=n){ cout<<-1; return 0; } n=v.size()-1; for(int i=0;i<=n;i++){ for(int j=0;j<3;j++){ seg[j].up(1,0,n+1,i,1e16,1); } } seg[0].up(1,0,n+1,0,0,1); seg[1].up(1,0,n+1,n,0,1); for(int i=1;i<=m;i++){ ll x=seg[0].get(1,0,n+1,g[i][0],g[i][1]+1); ll y=seg[1].get(1,0,n+1,g[i][0],g[i][1]+1); //cout<<x<<" "<<y<<'\n'; seg[2].up(1,0,n+1,g[i][2],x+y+g[i][3],0); seg[0].up(1,0,n+1,g[i][2],x+g[i][3],0); seg[1].up(1,0,n+1,g[i][2],y+g[i][3],0); } ll ans=seg[2].get(1,0,n+1,0,n+1); if(ans==1e16) ans=-1; cout<<ans; return 0; }
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