Submission #1028106

#	Time	Username	Problem	Language	Result	Execution time	Memory
1028106		vjudge1	Foehn Phenomena (JOI17_foehn_phenomena)	C++17	100 / 100	82 ms	13076 KiB

foehn_phenomena

#include <bits/stdc++.h>
using namespace std;
 
#define ll long long
#define ld long double
#define pii pair<int, int>
#define pll pair<ll, ll>
#define pld pair<ld, ld>
#define pb push_back
#define fi first
#define se second
#define debug(x) cout << #x << " => " << x << endl
#define all(x) x.begin(),x.end()

int main()
{
	ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
	ll n,q,s,t;cin>>n>>q>>s>>t;
	ll a[n+1],d[n+2];
	d[n+1]=0;
	for(int i=0;i<=n;i++) cin>>a[i];
	for(int i=1;i<=n;i++) d[i]=(a[i-1]-a[i]);
	ll x=0,y=0;
	for(int i=1;i<=n;i++) 
	{
		if(d[i]<0) x+=d[i];
		else y+=d[i];
	}
	while(q--)
	{
		int l,r,v;cin>>l>>r>>v;
		if(d[l]<0) x-=d[l];
		else y-=d[l];
		if(d[r+1]<0) x-=d[r+1];
		else y-=d[r+1];
		d[l]-=v;
		d[r+1]+=v;
		d[n+1]=0;
		if(d[l]<0) x+=d[l];
		else y+=d[l];
		if(d[r+1]<0) x+=d[r+1];
		else y+=d[r+1];
		// for(int i=1;i<=n;i++) cout<<d[i]<<' ';cout<<'\n';
		cout<<s*x+t*y<<'\n';
	}
	return 0;
}

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