Submission #1122174

#TimeUsernameProblemLanguageResultExecution timeMemory
1122174LuvidiHedgehog Daniyar and Algorithms (IZhO19_sortbooks)C++17
100 / 100
1218 ms102096 KiB
#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define pll pair<ll, ll>
#define pii pair<int, int>
#define fs first
#define sc second
#define pb push_back

const int maxn=1e6;
int seg[4*maxn],lzy[4*maxn];

void prop(int v){
    seg[2*v+1]=max(seg[2*v+1],lzy[v]);
    seg[2*v+2]=max(seg[2*v+2],lzy[v]);
    lzy[2*v+1]=max(lzy[2*v+1],lzy[v]);
    lzy[2*v+2]=max(lzy[2*v+2],lzy[v]);
}

int upd(int v,int l,int r,int l2,int r2,int x){
    if(l>r2||r<l2)return 0;
    if(l2<=l&&r<=r2){
        lzy[v]=max(lzy[v],x);
        return seg[v]=max(seg[v],x);
    }
    prop(v);
    int m=(l+r)/2;
    return seg[v]=max(upd(2*v+1,l,m,l2,r2,x),upd(2*v+2,m+1,r,l2,r2,x));
}

int query(int v,int l,int r,int idx){
    if(idx<l||idx>r)return 0;
    if(l==r)return seg[v];
    prop(v);
    int m=(l+r)/2;
    return max(query(2*v+1,l,m,idx),query(2*v+2,m+1,r,idx));
}

void solve() {
    int n,q;
    cin>>n>>q;
    int a[n];
    for(int i=0;i<n;i++)cin>>a[i];
    bool ans[q];
    vector<pair<pii,int>> qry[n];
    for(int i=0;i<q;i++){
        int l,r,k;
        cin>>l>>r>>k;
        qry[--r].pb({{--l,k},i});
    }
    vector<int> st;
    for(int i=0;i<n;i++){
        while(!st.empty()&&a[st.back()]<=a[i])st.pop_back();
        if(!st.empty()){
            int l,r=st.back();
            if(st.size()>1)l=st[st.size()-2];
            else l=0;
            upd(0,0,n-1,l,r,a[r]+a[i]);
        }
        st.pb(i);
        for(auto[p,idx]:qry[i]){
            auto[l,k]=p;
            ans[idx]=query(0,0,n-1,l)<=k;
        }
    }
    for(bool b:ans)cout<<b<<'\n';
}

int main() {
    #ifdef FPO
        freopen("in","r",stdin);
        freopen("out","w",stdout);
    #endif
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);

    solve();
}
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