Submission #806883

#	Time	Username	Problem	Language	Result	Execution time	Memory
806883		alextodoran	Measures (CEOI22_measures)	C++17	100 / 100	166 ms	58740 KiB

Main

/**
 _  _   __  _ _ _  _  _ _
 |a  ||t  ||o    d | |o  |
| __    _| | _ | __|  _ |
| __ |/_  | __  /__\ / _\|

**/

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

const int N_MAX = 200000;
const int M_MAX = 200000;
const int X_MAX = N_MAX + M_MAX;
const ll INF = LLONG_MAX / 2;

int N, M, D;
int A[N_MAX + 2];
int B[M_MAX + 2];

int Aid[N_MAX + 2];
int Bid[M_MAX + 2];

int X;
pair <int, int> aux[X_MAX + 2];
void compress () {
    for (int i = 1; i <= N; i++) {
        aux[++X] = make_pair(A[i], i);
    }
    for (int i = 1; i <= M; i++) {
        aux[++X] = make_pair(B[i], N + i);
    }
    sort(aux + 1, aux + X + 1);
    for (int i = 1; i <= X; i++) {
        if (aux[i].second <= N) {
            Aid[aux[i].second] = i;
        } else {
            Bid[aux[i].second - N] = i;
        }
    }
}

struct SegInfo {
    ll mx, mn;
    ll maxDiff;
    ll lazy;
    SegInfo () {
        mx = -INF;
        mn = +INF;
        maxDiff = 0;
        lazy = 0;
    }
    void init (const int &val) {
        mx = mn = val - lazy;
        maxDiff = 0;
    }
    void add (const ll &val) {
        mx -= val;
        mn -= val;
        lazy += val;
    }
};
SegInfo operator + (const SegInfo &A, const SegInfo &B) {
    SegInfo C;
    C.mx = max(A.mx, B.mx);
    C.mn = min(A.mn, B.mn);
    C.maxDiff = max({A.maxDiff, B.maxDiff, A.mx - B.mn});
    C.lazy = 0;
    return C;
}

SegInfo segTree[X_MAX * 4 + 2];

void update (int node, int l, int r, int pos, int val) {
    if (l == r) {
        segTree[node].init(val);
        return;
    }
    int mid = (l + r) / 2;
    int left = node * 2, right = node * 2 + 1;
    segTree[left].add(segTree[node].lazy);
    segTree[right].add(segTree[node].lazy);
    if (pos <= mid) {
        update(left, l, mid, pos, val);
        segTree[right].add(D);
    } else {
        update(right, mid + 1, r, pos, val);
    }
    segTree[node] = segTree[left] + segTree[right];
}
void update (int pos, int val) {
    update(1, 1, X, pos, val);
}

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

    cin >> N >> M >> D;
    for (int i = 1; i <= N; i++) {
        cin >> A[i];
    }
    for (int i = 1; i <= M; i++) {
        cin >> B[i];
    }
    compress();
    for (int i = 1; i <= N; i++) {
        update(Aid[i], A[i]);
    }
    for (int i = 1; i <= M; i++) {
        update(Bid[i], B[i]);
        ll t = segTree[1].maxDiff;
        if (t % 2 == 0) {
            cout << t / 2 << " ";
        } else {
            cout << t / 2 << ".5 ";
        }
    }
    cout << "\n";

    return 0;
}

• Subtask 1: 10 / 10
• Subtask 2: 14 / 14
• Subtask 3: 35 / 35
• Subtask 4: 41 / 41