Submission #538866

#	Time	Username	Problem	Language	Result	Execution time	Memory
538866		Olympia	Sjeckanje (COCI21_sjeckanje)	C++17	0 / 110	1 ms	340 KiB

Main

#include <vector>
#include <algorithm>
#include <iostream>
#include <set>
#include <cmath>
#include <map>
#include <random>
#include <cassert>
#include <ctime>
#include <cstdlib>
#include <limits.h>

using namespace std;
const int MOD = 1e9;

class Node {
public:
    int64_t lval;
    int64_t rval;
    int64_t ltot;
    int64_t rtot;
    int64_t mtot;
    int64_t tot;
};

const Node INF = {-1, 0, 0, 0, 0, 0};

Node merge (Node left, Node right) {
    if (left.lval == -1) {
        return right;
    }
    if (right.lval == -1) {
        return left;
    }
    Node ans;
    ans.lval = left.lval;
    ans.rval = right.rval;
    ans.tot = max(left.tot + right.tot, left.ltot + right.rtot + abs(left.rval - right.lval));
    ans.mtot = max(left.rval + right.lval, left.mtot + right.mtot + abs(left.rval - right.lval));
    ans.ltot = max(left.tot + right.ltot, left.ltot + right.ltot + abs(left.rval - right.lval));
    ans.rtot = max(right.tot + left.rtot, right.rtot + left.rtot + abs(left.rval - right.lval));
    return ans;
}

struct segmentTree {
    vector<Node> vec;
    vector<int64_t> addLater;

    void push(int v) {
        addLater[2 * v + 1] += addLater[v];
        vec[2 * v + 1].lval += addLater[v];
        vec[2 * v + 1].rval += addLater[v];
        addLater[2 * v] += addLater[v];
        vec[2 * v].lval += addLater[v];
        vec[2 * v].rval += addLater[v];
        addLater[v] = 0;
    }

    void upd(int dum, int tl, int tr, int l, int r, int64_t val) {
        if (tr < l || tl > r) {
            return;
        }
        if (tl >= l && tr <= r) {
            addLater[dum] += val;
            vec[dum].lval += val;
            vec[dum].rval += val;
            return;
        }
        push(dum);
        int mid = (tl + tr) >> 1;
        upd(2 * dum, tl, mid, l, r, val);
        upd(2 * dum + 1, mid + 1, tr, l, r, val);
        vec[dum] = merge(vec[2 * dum], vec[2 * dum + 1]);
    }

    void upd(int l, int r, int val) {
        upd(1, 0, (int) vec.size() / 2 - 1, l, r, val);
    }

    Node get(int dum, int tl, int tr, int &l, int &r) {
        if (tl > r || tr < l) {
            return INF;
        }
        if (tl >= l && tr <= r) {
            return vec[dum];
        }
        push(dum);
        int tm = (tl + tr) >> 1;
        return merge(get(dum * 2, tl, tm, l, r), get(dum * 2 + 1, tm + 1, tr, l, r));
    }

    Node get(int l, int r) {
        return get(1, 0, (int) vec.size() / 2 - 1, l, r);
    }

    void resz(int n) {
        int sz = ((1 << (int) ceil(log2(n))));
        vec.resize(sz * 2);
        addLater.resize(sz * 2);
    }

};

int main() {
    //freopen("haybales.in", "r", stdin);
    //freopen("haybales.out", "w", stdout);
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    int N, D;
    cin >> N >> D;
    segmentTree st;
    st.resz(N);
    for (int i = 0; i < N; i++) {
        int x; cin >> x;
        st.upd(i, i, x);
    }
    //st.upd(0, 0, 1);
    while (D--) {
        int l, r, x;
        cin >> l >> r >> x;
        l--, r--;
        st.upd(l, r, x);
        cout << st.get(0, N - 1).tot << '\n';
    }
}

• Subtask 1: 0 / 15
• Subtask 2: 0 / 40
• Subtask 3: 0 / 55