Submission #534335

#	Time	Username	Problem	Language	Result	Execution time	Memory
534335		LittleOrange	Foehn Phenomena (JOI17_foehn_phenomena)	C++17	100 / 100	144 ms	13148 KiB

foehn_phenomena

#include<bits/stdc++.h>
using namespace std;
using ll = long long;
int main(){
    ios::sync_with_stdio(0);cin.tie(0);
    ll n,q,s,t;
    cin >> n >> q >> s >> t;
    vector<ll> a(n+1,0),d(n+1,0);
    for (int i = 0;i<=n;i++){
        cin >> a[i];
        if (i) d[i] = a[i]-a[i-1];
    }
    auto f = [&s,&t](ll i){return i>0?i*s:i*t;};
    ll ans = 0;
    for (int i = 1;i<=n;i++){
        ans -= f(d[i]);
    }
    while (q--){
        ll l,r,x;
        cin >> l >> r >> x;
        ans += f(d[l]);
        d[l]+=x;
        ans -= f(d[l]);
        if (r<n){
            ans+=f(d[r+1]);
            d[r+1]-=x;
            ans-=f(d[r+1]);
        }
        cout << ans << "\n";
    }
}

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