Submission #584590

#	Time	Username	Problem	Language	Result	Execution time	Memory
584590		MasterTaster	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++14	64 / 100	3101 ms	77040 KiB

sortbooks

#include<iostream>
#include<map>
#include<vector>
#include<stack>
#include<algorithm>
 
#define ll long long
#define pii pair<int, int>
#define xx first
#define yy second
#define pb push_back
#define MAXN 1000005
 
using namespace std;
 
int seg[4*MAXN], n, m, a[MAXN], lg[MAXN];
vector< pair < pii, pii > > all;
vector< pair < pii, int > > order;
int ress[MAXN];

void upd(int node, int l, int r, int ind, int val)
{
    if (ind>r || ind<l) return;
    if (l==r) { seg[node]=val; return; }
 
    int mid=l+(r-l)/2;
    upd(2*node, l, mid, ind, val);
    upd(2*node+1, mid+1, r, ind, val);
    seg[node]=max(seg[2*node], seg[2*node+1]);
}
 
int maxQuery(int node, int l, int r, int left, int right)
{
    if (left>r || right<l) return -1;
    if (left<=l && right>=r) return seg[node];
 
    int mid=l+(r-l)/2;
    return max(maxQuery(2*node, l, mid, left, right), maxQuery(2*node+1, mid+1, r, left, right));
}
 
int main(){
    cin>>n>>m;
 
    for (int i=1; i<=n; i++) cin>>a[i];
 
    stack<pii> st;
    st.push({1000000001, 0});
    for (int i=1; i<=n; i++)
    {
        while (st.top().xx<=a[i]) st.pop();
        lg[i]=st.top().yy;
        //cout<<i<<" "<<lg[i]<<endl;
        st.push({a[i], i});
        if (lg[i]!=0) all.pb({{a[i]+a[lg[i]], 0}, {i, lg[i]}});
    }
 
    for (int i=0; i<m; i++)
    {
        int l, r, k; cin>>l>>r>>k;
        order.pb({{l, r}, k});
        all.pb({{k, i+1}, {l, r}});
    }
 
    sort(all.begin(), all.end(), greater< pair < pii, pii > >());
 
    for (int i=0; i<all.size(); i++)
    {
        int k=all[i].xx.xx, t=all[i].xx.yy, l=all[i].yy.xx, r=all[i].yy.yy;
        //cout<<k<<" "<<t<<" "<<l<<" "<<r<<endl;
        if (t==0)
        {
            upd(1, 1, n, l, r);
        }
        else
        {
            int x=maxQuery(1, 1, n, l, r), temp=1;
            //cout<<x<<endl;
            if (x>=l) temp=0;
            ress[t-1]=temp;
        }
    }
 
    for (int i=0; i<m; i++)
    {
        cout<<ress[i]<<endl;
    }
}

Compilation message (stderr)

sortbooks.cpp: In function 'int main()':
sortbooks.cpp:67:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<std::pair<int, int>, std::pair<int, int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   67 |     for (int i=0; i<all.size(); i++)
      |                   ~^~~~~~~~~~~
sortbooks.cpp:69:13: warning: unused variable 'k' [-Wunused-variable]
   69 |         int k=all[i].xx.xx, t=all[i].xx.yy, l=all[i].yy.xx, r=all[i].yy.yy;
      |             ^

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