Submission #547064

#	Time	Username	Problem	Language	Result	Execution time	Memory
547064		leaked	Food Court (JOI21_foodcourt)	C++14	24 / 100	184 ms	62724 KiB

foodcourt

#include <bits/stdc++.h>

#define f first
#define s second
#define m_p make_pair
#define vec vector
#define pb push_back
#define all(x) (x).begin(),(x).end()
#define rall(x) (x).rbegin(),(x).rend()
#define sz(x) (int)(x).size()
#define pw(x) (1LL<<(x))
#define fast_prep ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);

using namespace std;
typedef long long ll;
const int N=250'000+1;
template<class T> bool umax(T &a,const T &b){return (a<b?a=b,1:0);}
struct fenwick{
    ll fnw[N];
    fenwick(){
        fill(fnw,fnw+N,0);
    }
    void reset(){
        fill(fnw,fnw+N,0);
    }
    void upd(int i,int x){
        ++i;
        while(i<N){
            fnw[i]+=x;
            i+=i&-i;
        }
    }
    ll get(int i){
        ++i;
        ll ans=0;
        while(i>0){
            ans+=fnw[i];
            i-=i&-i;
        }
        return ans;
    }
    void add(int l,int r,ll x){
        upd(l,x);
        upd(r+1,-x);
    }
};

struct segtree{
    ll p1[4*N],p2[4*N];
    int p3[4*N];
    ll mx[4*N],mn[4*N];
    segtree(){
        fill(mx,mx+4*N,0);
        fill(mn,mn+4*N,0);
        fill(p1,p1+4*N,0);
        fill(p2,p2+4*N,0);
        fill(p3,p3+4*N,-1);
    }
    void push(int v,int tl,int tr){
        if(p2[v]!=-1){
//            assert(p1[v]==0);
            for(auto &u : {2*v,2*v+1}){
                p2[u]=p2[v];
                mx[u]=mn[u]=p2[v];
                umax(p3[u],p3[v]);
                p1[u]=0;
            }
            p2[v]=-1;
        }
        else{
            for(auto &u : {2*v,2*v+1}){
                if(p2[u]!=-1) p2[u]+=p1[v];
                else p1[u]+=p1[v];
                mx[u]+=p1[v];mn[u]+=p1[v];
            }
            p1[v]=0;
        }
    }
    void add(int l,int r,int x,int t,int v,int tl,int tr){
        if(tl>r||tr<l) return;
        if(tl>=l&&tr<=r&&((mx[v]+x)<=0)==((mn[v]+x)<=0)){
//            cout<<"TL "<<tl<<' '<<tr<<' '<<mx[v]+x<<' '<<mn[v]+x<<endl;
            if((mx[v]+x)<=0){
                p1[v]=0;
                umax(p3[v],t);
                p2[v]=mx[v]=mn[v]=0;
//                cout<<"WAY "<<v<<' '<<tl<<' '<<tr<<endl;
                return;
            }
            if((p2[v]!=-1)) p2[v]+=x;
            else p1[v]+=x;
            mx[v]+=x;mn[v]+=x;
            return;
        }
        int tm=(tl+tr)>>1;push(v,tl,tr);
        add(l,r,x,t,2*v,tl,tm);add(l,r,x,t,2*v+1,tm+1,tr);
        mx[v]=max(mx[v<<1],mx[v<<1|1]);
        mn[v]=min(mn[v<<1],mn[v<<1|1]);
    }
    int get(int i,int v,int tl,int tr){
        if(tl==tr)
            return p3[v];
        int tm=(tl+tr)>>1;push(v,tl,tr);
        if(tm>=i)
            return get(i,v<<1,tl,tm);
        else
            return get(i,v<<1|1,tm+1,tr);
    }
}sega;
signed main(){
    fast_prep;
    int n,m,q;
    cin>>n>>m>>q;
    fenwick fen;
    vec<int> tl(q),tr(q);
    vec<int> t(q),l(q),r(q),c(q),k(q);
    vec<int> ask;
    vec<ll> rl(q);

    vec<ll> toadd(q);
    vec<vec<int>> need(q,vec<int>());
    for(int i=0;i<q;i++){
        cin>>t[i];
        if(t[i]==1){
            cin>>l[i]>>r[i]>>c[i]>>k[i];
            --l[i];--r[i];
            sega.add(l[i],r[i],k[i],i,1,0,n-1);
        }
        else if(t[i]==2){
            cin>>l[i]>>r[i]>>k[i];
            --l[i];--r[i];
            fen.add(l[i],r[i],k[i]);
            sega.add(l[i],r[i],-k[i],i,1,0,n-1);
        }
        else{
            ask.pb(i);
            cin>>l[i]>>k[i];
            --l[i];
            rl[i]=fen.get(l[i])+k[i];
//            cerr<<"WO "<<sega.get(l[i],1,0,n-1);
            tl[i]=sega.get(l[i],1,0,n-1)+1;tr[i]=i;
            if(tl[i]!=0) need[tl[i]-1].pb(i);
        }
    }
    {
        fen.reset();
        for(int i=0;i<q;i++){
            if(t[i]==1) fen.add(l[i],r[i],k[i]);
            else if(t[i]==2) fen.add(l[i],r[i],-k[i]);
            for(auto &j : need[i]){
                toadd[j]=-fen.get(l[j]);
            }
        }
    }
    int ok=1;
    while(ok){
        ok=0;
        fen.reset();
        vec<vec<int>> toask(q,vec<int>());
        ///just an id
        for(auto &i : ask){
            if(tl[i]!=tr[i]){
                int tm=(tl[i]+tr[i])>>1;
//                cout<<"HEYASK "<<i<<' '<<tl[i]<<' '<<tr[i]<<' '<<tm<<endl;
                ok=1;
                toask[tm].pb(i);
            }
        }
        if(!ok) break;
        for(int i=0;i<q;i++){
            if(t[i]==1){
                fen.add(l[i],r[i],k[i]);
            }
//            cout<<"I "<<i<<endl;
            for(auto &j : toask[i]){
                ll have=fen.get(l[j])+toadd[j];
//                cout<<"YO "<<c[i]<<' '<<j<<' '<<have<<' '<<rl[j]<<endl;
                if(have>=rl[j]){
                    tr[j]=i;
                }
                else{
                    tl[j]=i+1;
                }
            }
        }
    }
    for(auto &i : ask){
        cout<<(tl[i]==i?0:c[tl[i]])<<'\n';
    }
    return 0;
}
/*
3 5 5
1 2 3 5 2
1 1 2 2 4
2 1 3 3
1 2 3 4 2
3 3 2

3 5 5
1 2 3 5 2
1 1 2 2 4
2 1 3 3
3 1 2
1 2 3 4 2

*/

• Subtask 1: 2 / 2
• Subtask 2: 0 / 5
• Subtask 3: 7 / 7
• Subtask 4: 0 / 21
• Subtask 5: 15 / 15
• Subtask 6: 0 / 13
• Subtask 7: 0 / 26
• Subtask 8: 0 / 11