Submission #661090

#	Time	Username	Problem	Language	Result	Execution time	Memory
661090		sandry24	Foehn Phenomena (JOI17_foehn_phenomena)	C++17	100 / 100	107 ms	13060 KiB

foehn_phenomena

#include <bits/stdc++.h>
using namespace std;
 
typedef long long ll;
typedef vector<int> vi;
typedef pair<int, int> pi;
#define pb push_back
#define mp make_pair
#define f first
#define s second
 
void solve(){
    ll n, q, s, t, pos = 0, neg = 0;
    cin >> n >> q >> s >> t;
    vector<ll> a(n+1), diff(n+1);
    for(int i = 0; i <= n; i++)
        cin >> a[i];
    for(int i = 1; i <= n; i++){
        diff[i] = a[i] - a[i-1];
        if(a[i] >= a[i-1])
            pos += diff[i];
        else
            neg += -diff[i];
    }
    //cout << neg*t - pos*s << '\n';
    for(int i = 0; i < q; i++){
        ll l, r, x;
        cin >> l >> r >> x;
        if(diff[l] < 0)
            neg -= -diff[l];
        else
            pos -= diff[l];
        diff[l] += x;
        if(diff[l] < 0)
            neg += -diff[l];
        else
            pos += diff[l];
        if(r != n){
            if(diff[r+1] < 0)
                neg -= -diff[r+1];
            else
                pos -= diff[r+1];
            diff[r+1] -= x;
            if(diff[r+1] < 0)
                neg += -diff[r+1];
            else
                pos += diff[r+1];
        }
        cout << neg*t - pos*s << '\n';
    }
}
 
int main()
{
    ios::sync_with_stdio(0); cin.tie(0);
    int t = 1;
    //cin >> t;
    while(t--){
        solve();
    }
}

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