This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include<iostream>
using namespace std;
int pot=1;
long long drzewo[500000];
int a[300000];
void dodaj(int x,int y,int ile)
{
x+=pot;
y+=pot;
drzewo[x]+=ile;
if(x!=y)
drzewo[y]+=ile;
while(x/2!=y/2)
{
if(x%2==0)
drzewo[x+1]+=ile;
if(y%2==1)
drzewo[y-1]+=ile;
x/=2;
y/=2;
}
}
long long zap(int x)
{
x+=pot;
long long wynik=0;
wynik+=drzewo[x];
x/=2;
while(x>0)
{
wynik+=drzewo[x];
x/=2;
}
return wynik;
}
int main()
{
cin.tie(0);
cout.tie(0);
ios_base::sync_with_stdio(0);
int n,q,s,t,x,y,z;
cin>>n>>q>>s>>t;
for(int i=1;i<=n+1;i++)
cin>>a[i];
while(pot<=n)
pot*=2;
pot--;
for(int i=1;i<=n+1;i++)
drzewo[i+pot]=a[i];
long long wynik=0;
for(int i=2;i<=n+1;i++)
{
if(a[i]>a[i-1])
wynik-=(a[i]-a[i-1])*s;
else wynik+=(a[i-1]-a[i])*t;
}
while(q--)
{
cin>>x>>y>>z;
x++;
y++;
dodaj(x,y,z);
long long nowy_x=zap(x);
long long nowy_y=zap(y);
if(x>1)
{
long long x_1=zap(x-1);
long long stary_x=nowy_x-z;
if(stary_x>x_1)
wynik+=(stary_x-x_1)*s;
else wynik-=(x_1-stary_x)*t;
if(nowy_x>x_1)
wynik-=(nowy_x-x_1)*s;
else wynik+=(x_1-nowy_x)*t;
}
if(y<n+1)
{
long long y_1=zap(y+1);
long long stary_y=nowy_y-z;
if(y_1>stary_y)
wynik+=(y_1-stary_y)*s;
else wynik-=(stary_y-y_1)*t;
if(y_1>nowy_y)
wynik-=(y_1-nowy_y)*s;
else wynik+=(nowy_y-y_1)*t;
}
cout<<wynik<<"\n";
}
return 0;
}
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