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;
#define pb push_back
#define fi first
#define se second
#define for1(i,j,k) for(int i=j;i<=k;i++)
#define for2(i,j,k) for(int i=j;i>=k;i--)
#define for3(i,j,k,l) for(int i=j;i<=k;i+=l)
#define bit(n,i) ((n>>i)&1)
#define all(x) x.begin(),x.end()
//#pragma GCC optimize("O2,unroll-loops")
//#pragma GCC target("avx,avx2,bmi,bmi2,sse,sse2,sse3,ssse3,sse4,popcnt")
#define int long long
typedef long long ll;
typedef pair<int,int> pii;
typedef double ld;
typedef pair<ld,ld> pdd;
typedef pair<ll,ll> pll;
const ll maxn=2e5+10;
const ll N=1e5;
const ll offset=1e18;
const double eps= 1e-9;
//const ll block_sz=317;
const ll inf=1e9;
const ll mod=1e9+7;
int n,q,a[maxn],d[maxn];
int st[maxn*4][2][2];
void Update(int u,int val,int id=1,int l=1,int r=n-1)
{
if (l==r)
{
d[l]+=val;
st[id][1][1]=abs(d[l]);
st[id][1][0]=-inf;
st[id][0][1]=-inf;
st[id][0][0]=0;
return;
}
int mid=l+r>>1;
if (u<=mid) Update(u,val,id*2,l,mid);
else Update(u,val,id*2+1,mid+1,r);
st[id][0][0]=max({st[id*2][0][1]+st[id*2+1][0][0],st[id*2][0][0]+st[id*2+1][1][0],st[id*2][0][0]+st[id*2+1][0][0]});
st[id][1][0]=max({st[id*2][1][1]+st[id*2+1][0][0],st[id*2][1][0]+st[id*2+1][1][0],st[id*2][1][0]+st[id*2+1][0][0]});
st[id][0][1]=max({st[id*2][0][1]+st[id*2+1][0][1],st[id*2][0][0]+st[id*2+1][1][1],st[id*2][0][0]+st[id*2+1][0][1]});
st[id][1][1]=max({st[id*2][1][1]+st[id*2+1][0][1],st[id*2][1][0]+st[id*2+1][1][1],st[id*2][1][0]+st[id*2+1][0][1]});
if (d[mid]*d[mid+1]>=0)
{
st[id][0][0]=max(st[id][0][0],st[id*2][0][1]+st[id*2+1][1][0]);
st[id][1][0]=max(st[id][1][0],st[id*2][1][1]+st[id*2+1][1][0]);
st[id][0][1]=max(st[id][0][1],st[id*2][0][1]+st[id*2+1][1][1]);
st[id][1][1]=max(st[id][1][1],st[id*2][1][1]+st[id*2+1][1][1]);
}
}
void sol()
{
cin >> n>> q;
for1(i,1,n)
{
cin >> a[i];
}
for1(i,1,n-1)
{
Update(i,a[i+1]-a[i]);
}
// cerr<<max({st[1][0][0],st[1][1][0],st[1][0][1],st[1][1][1]});
for1(i,1,q)
{
int l,r,x; cin >> l>>r>>x;
if (l-1>=1) Update(l-1,x);
if (r<n) Update(r,-x);
cout <<max({st[1][0][0],st[1][1][0],st[1][0][1],st[1][1][1]})<<'\n';
}
}
int32_t main()
{
ios_base::sync_with_stdio(false);
cin.tie(NULL);
// freopen("SUBSET.inp","r",stdin);
// freopen("SUBSET.out","w",stdout);
int t=1;
//cin >> t;
while (t--)
{
sol();
}
}
/*
1 3 4
1 1
1 3
3 1
3 3
*/
/*
0 1 1 3.3
0 0 1 12.5
1 0 1 12.5
1 2 0 9.4625
2 0 0 12.5
2 0 1 13.05
3 1 0 13.2431
5 0 0 14.4931
14.493055556
*/
Compilation message (stderr)
Main.cpp: In function 'void Update(long long int, long long int, long long int, long long int, long long int)':
Main.cpp:40:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
40 | int mid=l+r>>1;
| ~^~
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