Submission #537752

#	Time	Username	Problem	Language	Result	Execution time	Memory
537752		truc12a2cvp	Foehn Phenomena (JOI17_foehn_phenomena)	C++14	100 / 100	120 ms	12264 KiB

foehn_phenomena

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int, int> II;
const int N = 2e5 + 5, logN = 20;
const int MOD = 1e9 + 7;
const ll INF = 1e9;

int n, q, s, t, a[N];
ll ans = 0, dif[N];

void update(int i, ll val){
       if(dif[i] > 0) ans += dif[i] * 1ll * s;
       else ans += dif[i] * 1ll * t;

       dif[i] = val;

       if(dif[i] > 0) ans -= dif[i] * 1ll * s;
       else ans -= dif[i] * 1ll * t;
}

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cin >> n >> q >> s >> t;
    for(int i = 0; i <= n; i ++) cin >> a[i];
    for(int i = 1; i <= n; i ++){
       update(i, a[i] - a[i - 1]);
    }
    while(q --){
       int l, r, x;
       cin >> l >> r >> x;
       update(l, dif[l] + x);
       if(r + 1 <= n) update(r + 1, dif[r + 1] - x);
       cout << ans << "\n";
    }
    return 0;
}

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