Submission #535369

#	Time	Username	Problem	Language	Result	Execution time	Memory
535369		amunduzbaev	Foehn Phenomena (JOI17_foehn_phenomena)	C++17	100 / 100	130 ms	7240 KiB

foehn_phenomena

#include "bits/stdc++.h"
using namespace std;
 
#define ar array
#define int long long
const int N = 2e5 + 5;
int a[N], d[N];
 
signed main(){
	ios::sync_with_stdio(0); cin.tie(0);
	
	int n, q, s, t; cin>>n>>q>>s>>t;
	for(int i=0;i<=n;i++) cin>>a[i];
	int res = 0;
	for(int i=1;i<=n;i++){
		d[i] = a[i] - a[i-1];
		if(d[i] > 0) res -= d[i] * s;
		else res -= d[i] * t;
	}
	
	auto upd = [&](int i, int x){
		if(i > n) return;
		if(d[i] > 0) res += d[i] * s;
		else res += d[i] * t;
		d[i] += x;
		if(d[i] > 0) res -= d[i] * s;
		else res -= d[i] * t;
	};
	
	while(q--){
		int l, r, x; cin>>l>>r>>x;
		upd(l, x);
		upd(r+1, -x);
		cout<<res<<"\n";
	}
}

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