Submission #683377

#	Time	Username	Problem	Language	Result	Execution time	Memory
683377		FatihSolak	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++17	0 / 100	782 ms	262144 KiB

sortbooks

#include <bits/stdc++.h>
#define N 1000005
using namespace std;
int a[N];
int ans[N];
struct node{
    int val = 0,maxi = -1;
};
struct event{
    int type,l,r,val,k;
    bool operator <(event &other){
        if(val == other.val){
            return type < other.type;
        }
        return val > other.val;
    }
};
vector<event> events;
struct SegTree{
    vector<node> t;
    int n;
    int idx,k;
    SegTree(int sz){
        n = sz;
        t.assign(4*n,{0,-1});
        build(1,1,n);
    }
    node merge(node a,node b){
        node ret;
        ret.val = max(ret.val,b.val);
        ret.maxi = max(a.maxi,b.maxi);
        return ret;
    }
    void build(int v,int tl,int tr){
        if(tl == tr){
            t[v].maxi = a[tl];
            return;
        }
        int tm = (tl + tr)/2;
        build(v*2,tl,tm);
        build(v*2+1,tm+1,tr);
        t[v] = merge(t[v*2],t[v*2+1]);
        for(int i = tm+1;i<=tr;i++){
            if(a[i] < t[v*2].maxi){
                t[v].val = max(t[v].val,t[v*2].maxi + a[i]);
            }
        }
    }
    node get(int v,int tl,int tr,int l,int r){
        if(tr < l || r < tl){
            return {0,-1};
        }
        if(l <= tl && tr <= r){
            return t[v];
        }
        int tm = (tl + tr)/2;
        node a = get(v*2,tl,tm,l,r);
        node b = get(v*2+1,tm+1,tr,l,r);
        events.push_back({idx,max(l,tm+1),min(r,tr),k + 1 - a.maxi,a.maxi});
        return merge(a,b);
    }
    node get(int l,int r,int id,int kk){
        idx = id;
        k = kk;
        return get(1,1,n,l,r);
    }
};
struct SegTree2{
    vector<int> t;
    int n;
    SegTree2(int sz){
        n = sz;
        t.assign(4*n,1e9);
    }
    void upd(int v,int tl,int tr,int pos,int val){
        if(tl == tr){
            t[v] = min(t[v],val);
            return;
        }
        int tm = (tl + tr)/2;
        if(pos <= tm){
            upd(v*2,tl,tm,pos,val);
        }
        else upd(v*2+1,tm+1,tr,pos,val);
        t[v] = min(t[v*2],t[v*2+1]);
    }
    int get(int v,int tl,int tr,int l,int r){
        if(tr < l || r < tl){
            return 1e9;
        }
        if(l <= tl && tr <= r){
            return t[v];
        }
        int tm = (tl + tr)/2;
        return min(get(v*2,tl,tm,l,r),get(v*2+1,tm+1,tr,l,r));
    }
    void upd(int pos,int val){
        upd(1,1,n,pos,val);
    }
    int get(int l,int r){
        return get(1,1,n,l,r);
    }
};
void solve(){
    int n,m;
    cin >> n >> m;
    for(int i = 1;i<=n;i++){
        cin >> a[i];
        events.push_back({0,i,i,a[i]});
    }
    SegTree t(n);
    for(int i = 1;i<=m;i++){
        int l,r,k;
        cin >> l >> r >> k;
        ans[i] = t.get(l,r,i,k).val <= k;
    }
    sort(events.begin(),events.end());
    SegTree2 tt(n);
    for(auto u:events){
        if(u.type){
            ans[u.type] &= tt.get(u.l,u.r) >= u.k;
        }
        else tt.upd(u.l,u.val);
    }
    for(int i = 1;i<=m;i++){
        cout << ans[i] << '\n';
    }
}
    
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    #ifdef Local
    freopen("in.txt","r",stdin);
    freopen("out.txt","w",stdout);
    #endif
    int t=1;
    //cin>>t;
    while(t--){
        solve();
    }
    #ifdef Local
    cout<<endl<<fixed<<setprecision(2)<<1000.0 * clock() / CLOCKS_PER_SEC<< " milliseconds ";
    #endif
}

• Subtask 1: 0 / 8
• Subtask 2: 0 / 9
• Subtask 3: 0 / 13
• Subtask 4: 0 / 17
• Subtask 5: 0 / 30
• Subtask 6: 0 / 23