Submission #1267348

#	Time	Username	Problem	Language	Result	Execution time	Memory
1267348		jj_master	Foehn Phenomena (JOI17_foehn_phenomena)	C++20	30 / 100	1096 ms	2496 KiB

foehn_phenomena

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

#define int long long 
#define pb push_back
#define eb emplace_back
#define fi first
#define se second

int compute_cost(int diff, int s, int t) {
    if (diff > 0) return -diff * s;
    else return -diff * t;
}

void sol() {
    int n, q, s, t;
    cin >> n >> q >> s >> t;

    vector<int> a;

    int x;
    for(int i = 0; i <= n; i++) {
        cin >> x;
        a.pb(x);
    }

    int total = 0;
    for (int i = 0; i < n; i++) {
        int diff = a[i + 1] - a[i];
        total += compute_cost(diff, s, t);
    }

    while (q--) {
        int l, r, z;
        cin >> l >> r >> z;

        if (l > 0) {
            int before = a[l] - a[l - 1];
            int after = (a[l] + z) - a[l - 1];
            total -= compute_cost(before, s, t);
            total += compute_cost(after, s, t);
        }
        if (r < n) {
            int before = a[r + 1] - a[r];
            int after = a[r + 1] - (a[r] + z);
            total -= compute_cost(before, s, t);
            total += compute_cost(after, s, t);
        }

        for (int i = l; i <= r; i++) {
            a[i] += z;
        }

        cout << total << '\n';
    }
}

int32_t main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    sol();
    return 0;
}

• Subtask 1: 30 / 30
• Subtask 2: 0 / 10
• Subtask 3: 0 / 60