Submission #1219284

#	Time	Username	Problem	Language	Result	Execution time	Memory
1219284		steveonalex	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++17	100 / 100	749 ms	67212 KiB

sortbooks

#include <bits/stdc++.h>
 
using namespace std;
 
typedef long long ll;
typedef unsigned long long ull;
 
#define MASK(i) (1ULL << (i))
#define GETBIT(mask, i) (((mask) >> (i)) & 1)
#define ALL(v) (v).begin(), (v).end()
 
ll max(ll a, ll b){return (a > b) ? a : b;}
ll min(ll a, ll b){return (a < b) ? a : b;}
ll gcd(ll a, ll b){return __gcd(abs(a), abs(b));}
ll lcm(ll a, ll b){return abs(a) / gcd(a, b) * abs(b);}
 
ll LASTBIT(ll mask){return (mask) & (-mask);}
int pop_cnt(ull mask){return __builtin_popcountll(mask);}
int ctz(ull mask){return __builtin_ctzll(mask);}
int logOf(ull mask){return 63 - __builtin_clzll(mask);}
 
mt19937_64 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
ll rngesus(ll l, ll r){return l + (ull) rng() % (r - l + 1);}
 
template <class T1, class T2>
    bool maximize(T1 &a, T2 b){
        if (a < b) {a = b; return true;}
        return false;
    }
 
template <class T1, class T2>
    bool minimize(T1 &a, T2 b){
        if (a > b) {a = b; return true;}
        return false;
    }
 
template <class T>
    void printArr(T container, string separator = " ", string finish = "\n", ostream &out = cout){
        for(auto item: container) out << item << separator;
        out << finish;
    }

template <class T>
    void remove_dup(vector<T> &a){
        sort(ALL(a));
        a.resize(unique(ALL(a)) - a.begin());
    }

const int N = 1e6 + 69, INF = 2e9 + 69;
vector<array<int, 3>> queries[N];

struct SegmentTree{
    int n;
    vector<int> a;

    SegmentTree(int _n){
        n = _n;
        a.resize(n * 2 + 2, -INF);
    }

    void update(int i, int v){
        i += n; if (!maximize(a[i], v)) return;
        while(i > 1){
            i >>= 1;
            a[i] = max(a[i * 2], a[i * 2 + 1]);
        }
    }

    int get(int l, int r){
        l += n; r += n + 1;
        int ans = -INF;
        while(l < r){
            if (l & 1) maximize(ans, a[l++]);
            if (r & 1) maximize(ans, a[--r]);
            l >>= 1; r >>= 1;
        }
        return ans;
    }
};

void solve(){
    int n, q; cin >> n >> q;
    vector<int> a(n+1);
    for(int i = 1; i <= n; ++i) cin >> a[i];

    vector<int> ans(q);
    for(int i = 0; i < q; ++i){
        int l, r, w; cin >> l >> r >> w;
        queries[r].push_back({{l, w, i}});
    }

    vector<int> st;
    SegmentTree segg(n);
    for(int i= 1; i <= n; ++i){
        while(st.size() && a[st.back()] <= a[i])
            st.pop_back();
        if (st.size()){
            int j = st.back();
            segg.update(j, a[j] + a[i]);
        }
        st.push_back(i);
        for(auto j: queries[i]){
            ans[j[2]] = (segg.get(j[0], i) <= j[1]);
        }
    }

    printArr(ans, "\n", "");

}
 
int main(void){
    ios::sync_with_stdio(0);cin.tie(0); cout.tie(0);
 
    clock_t start = clock();

    solve();

    cerr << "Time elapsed: " << clock() - start << "ms!\n";
    return 0;
}

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