Submission #1112786

#	Time	Username	Problem	Language	Result	Execution time	Memory
1112786		sunboi	Foehn Phenomena (JOI17_foehn_phenomena)	C++17	100 / 100	524 ms	13248 KiB

foehn_phenomena

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


signed main()
{
    int n, q, s, t; cin >> n >> q >> s >> t;
    vector<int> a(n + 1), dif(n + 1);
    for (int i = 0; i <= n; i++){
        cin >> a[i];
    }
    int ans = 0;
    for (int i = 1; i <= n; i++){
        dif[i] = a[i] - a[i - 1];
        
        if (dif[i] > 0) ans += -1 * s * dif[i];
        else ans += t * abs(dif[i]);
    }
    
    while(q--){
        int l, r, x; cin >> l >> r >> x;
        
        if (dif[l] > 0) ans -= -1 * s * dif[l];
        else ans -= t * abs(dif[l]);
        dif[l] += x;
        
        if (dif[l] > 0) ans += -1 * s * dif[l];
        else ans += t * abs(dif[l]);
        
        if (r < n){
            r++;
            if (dif[r] > 0) ans -= -1 * s * dif[r];
            else ans -= t * abs(dif[r]);
            dif[r] -= x;
            
            if (dif[r] > 0) ans += -1 * s * dif[r];
            else ans += t * abs(dif[r]);
        }
        
        cout << ans << endl;
        
        
    }
}

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