Submission #1180293

#	Time	Username	Problem	Language	Result	Execution time	Memory
1180293		Paz15	Foehn Phenomena (JOI17_foehn_phenomena)	C++20	100 / 100	61 ms	7312 KiB

foehn_phenomena

//fast
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;

#define rep(n) for(int i = 0 ; i<n ; i++)
#define all(x) x.begin(),x.end()
#define pb push_back

ll s,t,n;
const int base = 2e5+7;
ll alt[base];
ll diff[base];

ll update(int a, int b){
	ll w = 0;
	if (diff[a-1]<0){
		w+=diff[a-1]*s;
	}else w+=diff[a-1]*t;
	if (b!=n){
		if (diff[b]<0){
			w+=diff[b]*s;
		}else w+=diff[b]*t;
	}
	return w;
}

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int q;
	cin >> n >> q >> s >> t;
	ll sum = 0;
	cin >> alt[0];

	rep(n){
		cin >> alt[i+1];
		if (alt[i]>alt[i+1]){
			sum+=(alt[i]-alt[i+1])*t;
		}else sum+=(alt[i]-alt[i+1])*s;
		diff[i] = alt[i]-alt[i+1];
	}
	while (q--){
		int l,r,x;
		cin >> l >> r >> x;
		sum-=update(l,r);
		diff[l-1]-=x;
		diff[r]+=x;
		sum+=update(l,r);
		cout << sum << '\n';
	}
}

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