Submission #1123951

#	Time	Username	Problem	Language	Result	Execution time	Memory
1123951		njoop	Foehn Phenomena (JOI17_foehn_phenomena)	C++17	100 / 100	434 ms	7364 KiB

foehn_phenomena

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

int n, q, s, t, ans, arr[200010], dif[200010], l, r, x;

int find(int num) {
    if(num > 0) return num*t;
    else return num*s;
}

signed main() {
    cin >> n >> q >> s >> t;
    n++;
    for(int i=1; i<=n; i++) {
        cin >> arr[i];
    }
    for(int i=2; i<=n; i++) {
        dif[i-1] = arr[i-1]-arr[i];
        ans += find(dif[i-1]);
    }
    while(q--) {
        cin >> l >> r >> x;
        l++;
        r++;
        if(l != 1) {
            ans -= find(dif[l-1]);
            dif[l-1] -= x;
            ans += find(dif[l-1]); 
        }
        if(r < n) {
            ans -= find(dif[r]);
            dif[r] += x;
            ans += find(dif[r]);
        }
        cout << ans << "\n";
    }
    return 0;
}

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