Submission #1125586

#	Time	Username	Problem	Language	Result	Execution time	Memory
1125586		steveonalex	Two Antennas (JOI19_antennas)	C++20	100 / 100	659 ms	70884 KiB

antennas

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef unsigned long long ull;

#define MASK(i) (1LL << (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){
    while(a > 0 && b > 0){
        if (a > b) a %= b;
        else b %= a;
    }
    return a + b;
}
ll LASTBIT(ll mask){return (mask) & (-mask);}
int pop_cnt(ll mask){return __builtin_popcountll(mask);}
int ctz(ll mask){return __builtin_ctzll(mask);}
int logOf(ll mask){return __lg(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"){
        for(auto item: container) cout << item << separator;
        cout << finish;
    }


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

const ll INF = 1e18 + 69;

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

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

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

    ll get(int l, int r){
        l += n; r += n + 1;
        ll 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;
    }
};

struct SegmentTreeLazy{
    struct Node{
        ll a, b, lazy;
        Node(){
            a = b = lazy = -INF;
        }
    };

    int n;
    vector<Node> a;

    SegmentTreeLazy(int n): n(n){
        a.resize(n * 4 + 4);
    }

    void apply_a(int id, pair<ll, ll> val){
        a[id].a = val.first;
        a[id].b = val.first + val.second;
    }

    void apply_b(int id, ll val){
        maximize(a[id].b, a[id].a + val);
        maximize(a[id].lazy, val);
    }

    void down(int id){
        apply_b(id * 2, a[id].lazy);
        apply_b(id * 2 + 1, a[id].lazy);
        a[id].lazy = -INF;
    }

    Node combine(Node a, Node b){
        Node c;
        c.a = max(a.a, b.a);
        c.b = max(a.b, b.b);
        return c;
    }

    void update_a(int i, pair<ll, ll> val, int l, int r, int id){
        if (l == r){
            apply_a(id, val);
            return;
        }
        if (a[id].lazy != -INF) down(id);
        int mid = (l + r) >> 1;
        if (i <= mid) update_a(i, val, l, mid, id * 2);
        else update_a(i, val, mid + 1, r, id * 2 + 1);
        a[id] = combine(a[id * 2], a[id * 2 + 1]);
    }
    void update_a(int i, pair<ll, ll> val){
        update_a(i, val, 1, n, 1);
    }

    void update_b(int u, int v, ll val, int l, int r, int id){
        if (u <= l && r <= v){
            apply_b(id, val);
            return;
        }
        if (a[id].lazy != -INF) down(id);
        int mid = (l + r) >> 1;
        if (u <= mid) update_b(u, v, val, l, mid, id * 2);
        if (v > mid) update_b(u, v, val, mid + 1, r, id * 2 + 1);
        a[id] = combine(a[id * 2], a[id * 2 + 1]);
    }
    void update_b(int l, int r, ll val){
        update_b(l, r, val, 1, n, 1);
    }

    ll get(int u, int v, int l, int r, int id){
        if (u <= l && r <= v) return a[id].b;
        if (a[id].lazy != -INF) down(id);
        int mid = (l + r) >> 1;
        ll ans = -INF;
        if (u <= mid) maximize(ans, get(u, v, l, mid, id * 2));
        if (v > mid) maximize(ans, get(u, v, mid + 1, r, id * 2 + 1));
        return ans;
    }
    ll get(int u, int v){return get(u, v, 1, n, 1);}
};  

void solve(){
    int n; cin >> n;
    vector<array<ll, 3>> a(n+1);
    for(int i =1 ; i<=n; ++i) cin >> a[i][0] >> a[i][1] >> a[i][2];

    vector<vector<int>> range_enter(n+1), range_exit(n+1);
    for(int i = 1; i<=n; ++i) {
        int l = i + a[i][1], r = i + a[i][2];
        minimize(r, n);
        if (l > r) continue;
        range_enter[l].push_back(i);
        range_exit[r].push_back(i);
    }

    int q; cin >> q;
    vector<vector<pair<int, int>>> query(n+1);
    vector<ll> ans(q, -INF);
    for(int i = 0; i < q; ++i){
        int l, r; cin >> l >> r;
        query[r].push_back({l, i});
    }

    SegmentTree st(n);
    SegmentTreeLazy satan(n), angel(n);
    for(int i = 1; i<=n; ++i) {
        for(int j: range_enter[i]){
            satan.update_a(j, {-a[j][0], -INF});
            angel.update_a(j, {a[j][0], -INF});
        }
        int l = i - a[i][2], r = i - a[i][1];
        maximize(l, 1);
        if (l <= r){
            satan.update_b(l, r, a[i][0]);
            angel.update_b(l, r, -a[i][0]);
        }
        for(pair<int, int> j: query[i]){
            maximize(ans[j.second], st.get(j.first, i));
            maximize(ans[j.second], satan.get(j.first, i));
            maximize(ans[j.second], angel.get(j.first, i));
            maximize(ans[j.second], -1);
        }

        for(int j: range_exit[i]){
            st.update(j, satan.get(j, j));
            st.update(j, angel.get(j, j));
            satan.update_a(j, {-INF, -INF});
            angel.update_a(j, {-INF, -INF});
        }
    }

    printArr(ans);
}

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