Submission #507540

#	Time	Username	Problem	Language	Result	Execution time	Memory
507540		Vovamatrix	Foehn Phenomena (JOI17_foehn_phenomena)	C++14	100 / 100	130 ms	11612 KiB

foehn_phenomena

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define pb push_back
#define mp make_pair
#define mt make_tuple
#define fi first
#define sc second
#define th third
#define fo fourth
#define pii pair<int,int>
#define pll pair<ll,ll>
#define ldb double
#define endl "\n"
#define MAXN 200007
ll dis[MAXN],s,t,last,a,b;
int n,q;
void upd(int p,ll d)
{

	if(p<1 || p>n) return;
	if(dis[p]>0) a-=dis[p];
	else b+=dis[p];
	dis[p]+=d;
	if(dis[p]>0) a+=dis[p];
	else b-=dis[p];
}
int main()
{
    ios::sync_with_stdio(false); cin.tie(0);
    cin>>n>>q>>s>>t;
	for(int i=0;i<=n;i++)
    {
		cin>>dis[i];
		dis[i]-=last;
		if(dis[i]>0) a+=dis[i];
		else b-=dis[i];
		last+=dis[i];
	}
	for(int i=0;i<q;i++)
	{
		int l,r;
		ll x;
		cin>>l>>r>>x;
		upd(l,x),upd(r+1,-x);
		cout<<ll(b*t-a*s)<<endl;
	}
    return 0;
}

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