Submission #837542

#	Time	Username	Problem	Language	Result	Execution time	Memory
837542		borisAngelov	Foehn Phenomena (JOI17_foehn_phenomena)	C++17	30 / 100	8 ms	2132 KiB

foehn_phenomena

#include <bits/stdc++.h>

using namespace std;

const int maxn = 100005;

int n, q, s, t;

int a[maxn];
long long delta[maxn];

void fastIO()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
}

int main()
{
    fastIO();

    cin >> n >> q >> s >> t;

    for (int i = 1; i <= n + 1; ++i)
    {
        cin >> a[i];
    }

    for (int i = 1; i <= n; ++i)
    {
        delta[i] = a[i] - a[i + 1];
    }

    for (int i = 1; i <= q; ++i)
    {
        int l, r, val;
        cin >> l >> r >> val;

        if (l != 0)
        {
            delta[l] -= val;
        }

        if (r != n)
        {
            delta[r + 1] += val;
        }

        long long ans = 0;

        for (int j = 1; j <= n; ++j)
        {
            if (delta[j] < 0)
            {
                ans += delta[j] * (1LL * s);
            }
            else
            {
                ans += delta[j] * (1LL * t);
            }
        }

        cout << ans << "\n";
    }

    return 0;
}

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