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;
typedef long long ll;
ll s[1<<19][3][3],c[200005],lz[1<<19];
int n,q;
void merge(int a, int b, int res) {
for (int i=0; i<3; ++i) {
for (int j=0; j<3; ++j) {
s[res][i][j]=-1e15;
for (int k=0; k<3; ++k) s[res][i][j]=max(s[res][i][j],s[a][i][k]+s[b][2-k][j]);
if (i!=1) s[res][i][j]=max(s[res][i][j],s[b][i][j]);
if (j!=1) s[res][i][j]=max(s[res][i][j],s[a][i][j]);
}
}
}
void push(int l, int r, int idx) {
if (lz[idx]==-1e16) return;
if (l!=r) {
for (int i=0; i<3; ++i) {
for (int j=0; j<3; ++j) {
if (i==0) s[idx][i][j]-=lz[idx];
if (i==2) s[idx][i][j]+=lz[idx];
if (j==0) s[idx][i][j]-=lz[idx];
if (j==2) s[idx][i][j]+=lz[idx];
}
}
if (lz[2*idx]==-1e16) lz[2*idx]=lz[idx];
else lz[2*idx]+=lz[idx];
if (lz[2*idx+1]==-1e16) lz[2*idx+1]=lz[idx];
else lz[2*idx+1]+=lz[idx];
lz[idx]=-1e16;
} else {
c[l]+=lz[idx];
s[idx][0][0]=-1e15;
s[idx][0][1]=-c[l];
s[idx][0][2]=-1e15;
s[idx][1][0]=-c[l];
s[idx][1][1]=0;
s[idx][1][2]=c[l];
s[idx][2][0]=-1e15;
s[idx][2][1]=c[l];
s[idx][2][2]=-1e15;
lz[idx]=-1e16;
}
}
void build(int l, int r, int idx) {
if (l==r) {
push(l,r,idx);
} else {
int mid=(l+r)/2;
build(l,mid,2*idx);
build(mid+1,r,2*idx+1);
merge(2*idx,2*idx+1,idx);
}
}
void update(int l, int r, int idx, int x, int y, ll val) {
push(l,r,idx);
if (x>r || y<l) return;
if (x<=l && r<=y) {
lz[idx]=val;
push(l,r,idx);
} else {
int mid=(l+r)/2;
update(l,mid,2*idx,x,y,val);
update(mid+1,r,2*idx+1,x,y,val);
merge(2*idx,2*idx+1,idx);
}
}
int main() {
ios_base::sync_with_stdio(0); cin.tie(0);
for (int i=0; i<(1<<19); ++i) for (int j=0; j<3; ++j) for (int k=0; k<3; ++k) s[i][j][k]=-1e15;
for (int i=0; i<(1<<19); ++i) lz[i]=-1e16;
cin>>n>>q;
for (int i=1; i<=n; ++i) {
int x; cin>>x;
update(1,n,1,i,i,x);
}
while (q--) {
int l,r; ll val;
cin>>l>>r>>val;
update(1,n,1,l,r,val);
cout<<s[1][1][1]<<"\n";
}
}
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