Submission #1180702

#	Time	Username	Problem	Language	Result	Execution time	Memory
1180702		peteza	Foehn Phenomena (JOI17_foehn_phenomena)	C++20	100 / 100	60 ms	7240 KiB

foehn_phenomena

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

ll n, q, s, t;
ll a[1000005], diff[1000005];

ll val(ll x) {
    if(x > 0) return -x*s;
    return -x*t;
}

int l, r, x;

int main() {
    cin.tie(0) -> sync_with_stdio(0);
    cin >> n >> q >> s >> t;
    for(int i=0;i<=n;i++) {
        cin >> a[i];
    }
    ll csum = 0;
    for(int i=1;i<=n;i++) {
        diff[i] = a[i] - a[i-1];
        csum += val(diff[i]);
        //cout << csum << '\n';
    }
    //cout << csum << '\n';
    while(q--) {
        cin >> l >> r >> x;
        csum -= val(diff[l]);
        diff[l] += x;
        csum += val(diff[l]);
        r++;
        if(r<=n){
            csum -= val(diff[r]);
            diff[r] -= x;
            csum += val(diff[r]);
        }
        cout << csum << '\n';
    }
}

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