Submission #751116

#	Time	Username	Problem	Language	Result	Execution time	Memory
751116		vjudge1	Foehn Phenomena (JOI17_foehn_phenomena)	C++17	10 / 100	114 ms	5580 KiB

foehn_phenomena

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

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    ll n, q, s, t;
    cin >> n >> q >> s >> t;
    vector<ll> h(n + 1);
    ll hDiff = 0;
    for (int i = 0; i <= n; i++)
    {
        cin >> h[i];
        if (i > 0)
        {
            if (h[i - 1] < h[i])
            {
                hDiff += (h[i - 1] - h[i]) * s;
            }
            else
            {
                hDiff += (h[i - 1] - h[i]) * t;
            }
        }
    }
    ll l, r, x;
    for (int i = 0; i < q; i++)
    {
        cin >> l >> r >> x;

        ll ans = hDiff;
        if (l > 0)
        {
            // cout << "1 : " << ans;
            if (h[l - 1] < (h[l]))
            {
                ans -= (h[l - 1] - (h[l])) * s;
            }
            else
            {
                ans -= (h[l - 1] - (h[l])) * t;
            }
            // cout << " 2: " << ans;
            h[l] += x;
            if (h[l - 1] < (h[l]))
            {
                ans += (h[l - 1] - (h[l])) * s;
            }
            else
            {
                ans += ((h[l - 1] - (h[l]))) * t;
            }
            // cout << " 3: " << ans;
            h[l] -= x;
        }

        if (r < n)
        {
            // cout << " 4 : " << ans;
            if (h[r] < (h[r + 1]))
            {
                ans -= ((h[r]) - (h[r + 1])) * s;
            }
            else
            {
                ans -= ((h[r]) - (h[r + 1])) * t;
            }
            // cout << " 5: " << ans;
            h[r] += x;
            if (h[r] < (h[r + 1]))
            {
                ans += ((h[r]) - (h[r + 1])) * s;
            }
            else
            {
                ans += ((h[r]) - (h[r + 1])) * t;
            }
            // cout << " 6: " << ans;
            h[r] -= x;
        }

        if (r != l)
        {
            h[r] += x;
        }

        h[l] += x;

        hDiff = ans;
        cout << ans << "\n";
    }
    return 0;
}

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