Submission #1058659

#	Time	Username	Problem	Language	Result	Execution time	Memory
1058659		Jarif_Rahman	Two Antennas (JOI19_antennas)	C++17	13 / 100	1382 ms	524288 KiB

antennas

#include <bits/stdc++.h>
#define pb push_back
#define f first
#define sc second
using namespace std;
typedef long long int ll;
typedef string str;

struct segtree{
    int k;
    vector<int> v;
    segtree(int n){
        k = 1;
        while(k < n) k*=2;
        v.resize(2*k, -1);
    }
    void update(int in, int x){
        in+=k;
        v[in] = max(v[in], x);
        in/=2;
        while(in > 0){
            v[in] = max(v[2*in], v[2*in+1]);
            in/=2;
        }
    }
    int get(int l, int r, int nd, int a, int b){
        if(b < l || a > r) return -1;
        if(a >= l && b <= r) return v[nd];
        int c = (a+b)/2;
        return max(get(l, r, 2*nd, a, c), get(l, r, 2*nd+1, c+1, b));
    }
    int get(int l, int r){
        return get(l, r, 1, 0, k-1);
    }
};


int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    int n; cin >> n;
    vector<int> H(n), A(n), B(n);
    for(int i = 0; i < n; i++){
        cin >> H[i] >> A[i] >> B[i];
    }

    vector<vector<pair<int, int>>> ed(n);
    for(int i = 0; i < n; i++) for(int j = i+1; j < n; j++){
        if(j >= i+A[i] && j <= i+B[i] && i >= j-B[j] && i <= j-A[j])
            ed[j].push_back({i, abs(H[i]-H[j])});
    }

    segtree S(n);
    int q; cin >> q;
    vector<int> ans(q, -1);

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

    for(int i = 0; i < n; i++){
        for(auto [j, h]: ed[i]) S.update(j, h);
        for(auto [l, in]: queries[i]) ans[in] = S.get(l, i);
    }

    for(int x: ans) cout << x << "\n";
}

• Subtask 1: 2 / 2
• Subtask 2: 11 / 11
• Subtask 3: 0 / 22
• Subtask 4: 0 / 65