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<bits/stdc++.h>
using namespace std;
long long mas[200001];
long long tree[1000001];
void update(long long in,long long l,long long r,long long ot,long long du,long long k){
if(l>=ot && r<=du){
tree[in]+=k;
return ;
}
long long mid=(l+r)/2;
if(ot<=mid){
update(in*2,l,mid,ot,du,k);
}if(du>mid){
update(in*2+1,mid+1,r,ot,du,k);
}
return ;
}
long long ans(long long in,long long l,long long r,long long koj){
if(l==r){
return mas[l]+tree[in];
}
long long mid=(l+r)/2;
long long otg;
if(koj<=mid){
otg=ans(in*2,l,mid,koj);
}else{
otg=ans(in*2+1,mid+1,r,koj);
}
return otg+tree[in];
}
int main(){
ios_base::sync_with_stdio(0);
cin.tie(NULL);
cout.tie(NULL);
long long N,Q,S,T;
cin>>N>>Q>>S>>T;
long long nach=0;
cin>>mas[0];
for(long long i=1;i<=N;i++){
cin>>mas[i];
if(mas[i-1]<mas[i]){
nach-=(S*(mas[i]-mas[i-1]));
}else{
nach+=(T*(mas[i-1]-mas[i]));
}
}
//cout<<nach<<"\n";
long long l,r,x;
for(long long i=0;i<Q;i++){
cin>>l>>r>>x;
if(l!=0){
long long a1=ans(1,0,N,l-1);
long long a2=ans(1,0,N,l);
if(a1<a2){
nach+=(S*(a2-a1));
}else{
nach-=(T*(a1-a2));
}
}if(r!=N){
long long a1=ans(1,0,N,r);
long long a2=ans(1,0,N,r+1);
if(a1<a2){
nach+=(S*(a2-a1));
}else{
nach-=(T*(a1-a2));
}
}
update(1,0,N,l,r,x);
if(l!=0){
long long a1=ans(1,0,N,l-1);
long long a2=ans(1,0,N,l);
if(a1<a2){
nach-=(S*(a2-a1));
}else{
nach+=(T*(a1-a2));
}
}if(r!=N){
long long a1=ans(1,0,N,r);
long long a2=ans(1,0,N,r+1);
if(a1<a2){
nach-=(S*(a2-a1));
}else{
nach+=(T*(a1-a2));
}
}
cout<<nach<<"\n";
}
return 0;
}
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