Submission #897356

#	Time	Username	Problem	Language	Result	Execution time	Memory
897356		box	Foehn Phenomena (JOI17_foehn_phenomena)	C++17	100 / 100	87 ms	12372 KiB

foehn_phenomena

#include <bits/stdc++.h>
using namespace std;
    
int main() {
    ios::sync_with_stdio(0), cin.tie(0);
    int n, q, s, t; cin >> n >> q >> s >> t, n++;
    vector<int> a(n); for (int& x : a) cin >> x;
    vector<long long> d(n - 1);
    long long c = 0;
    auto upd = [&](int i, int x) {
        c -= d[i] * (d[i] >= 0 ? t : s);
        d[i] += x;
        c += d[i] * (d[i] >= 0 ? t : s);
    };
    for (int i = 0; i < n - 1; i++) upd(i, a[i] - a[i + 1]);
    while (q--) {
        int l, r, x; cin >> l >> r >> x;
        upd(l - 1, -x);
        if (r < n - 1) upd(r, +x);
        cout << c << '\n';
    }
    return 0;
}

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