Submission #1150246

#	Time	Username	Problem	Language	Result	Execution time	Memory
1150246		dosts	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++17	100 / 100	627 ms	84796 KiB

sortbooks

#include <bits/stdc++.h>
#pragma GCC target("avx2")
#pragma GCC optimize("O3,unroll-loops")
using namespace std;
#define int long long
#define pii pair<int,int>
#define ff first
#define ss second
#define sp << " " <<    
#define all(cont) cont.begin(),cont.end()
#define vi vector<int>

const int inf = 1e17,N = 2e6+1,MOD = 1e9+7,BL = 1000;


struct FT {
    int n;
    vi bit;

    FT(int nn) {
        n = nn;
        bit.assign(n+1,0);
    }
    void put(int p,int v) {
        p = n-p+1;
        for (int i = p;i<=n;i+=i&-i) bit[i] = max(bit[i],v);
    } 
    int get(int p) {
        p = n-p+1;
        int ans = 0;
        for (int i = p;i>0;i-=i&-i) ans = max(ans,bit[i]);
        return ans;
    }
};

void solve() { 
    int n,q;
    cin >> n >> q;
    vi a(n+1);
    for (int i=1;i<=n;i++) {
        cin >> a[i];
    }
    vi ans(q+1);
    vector<pair<pii,int>> qs[n+1];
    for (int i=1;i<=q;i++) {
        int l,r,k;
        cin >> l >> r >> k;
        qs[r].push_back({{l,k},i});
    }
    FT ft(n);
    stack<pii> stk;
    for (int i=1;i<=n;i++) {
        while (!stk.empty() && stk.top().ff <= a[i]) stk.pop();
        if (!stk.empty()) ft.put(stk.top().ss,a[i]+stk.top().ff);
        stk.push({a[i],i});
        for (auto it : qs[i]) {
            ans[it.ss] = (ft.get(it.ff.ff) <= it.ff.ss);
        }
    }
    for (int i=1;i<=q;i++) cout << ans[i] << '\n';
}

int32_t main() { 
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    #ifdef Dodi 
        freopen("in.txt","r",stdin);
        freopen("out.txt","w",stdout);
    #endif
    int t = 1;
    //cin >> t;
    while (t --> 0) solve();
}

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