Submission #1116095

#	Time	Username	Problem	Language	Result	Execution time	Memory
1116095		staszic_ojuz	Foehn Phenomena (JOI17_foehn_phenomena)	C++17	100 / 100	83 ms	12360 KiB

foehn_phenomena

#include <bits/stdc++.h>
using namespace std;

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

    int n, q, s, t;
    cin >> n >> q >> s >> t;
    vector<int> A(n + 1);
    for (int &a : A) {
        cin >> a;
    }

    vector<int64_t> deltas(n);
    int64_t non_neg_deltas = 0, neg_deltas = 0;
    auto upd_deltas = [&](int i, int64_t by_val) {
        if (i >= n) { return; }
        (deltas[i] < 0 ? neg_deltas : non_neg_deltas) -= deltas[i];
        deltas[i] += by_val;
        (deltas[i] < 0 ? neg_deltas : non_neg_deltas) += deltas[i];
    };
    for (int i = 0; i < n; ++i) {
        upd_deltas(i, A[i] - A[i + 1]);
    }

    for (int i = 0; i < q; ++i) {
        int l, r, x;
        cin >> l >> r >> x;
        upd_deltas(l - 1, -x);
        upd_deltas(r, x);
        cout << s * neg_deltas + t * non_neg_deltas << '\n';
    }
    return 0;
}

• Subtask 1: 30 / 30
• Subtask 2: 10 / 10
• Subtask 3: 60 / 60