#include <bits/stdc++.h>
#define tt cin.tie(0), cout.tie(0), ios_base::sync_with_stdio(0)
#define fo freopen((NAME+".INP").c_str(), "r", stdin), freopen((NAME+".OUT").c_str(), "w", stdout)
#define ll long long
#define ull unsigned long long
#define i128 __int128
#define db long double
#define sz(a) ((int)(a).size())
#define pb emplace_back
#define pf emplace_front
#define pob pop_back
#define pof pop_front
#define lb lower_bound
#define ub upper_bound
#define fi first
#define se second
#define ins emplace
#define mp make_pair
using namespace std;
const int MOD = 1e9+7, MAXN = 2e5+5;
const string NAME = "";
struct Node{
ll l,r,sum[2][2];
}sgt[MAXN<<2];
int n,q,a[MAXN];
inline void Merge(Node& rs, const Node& l, const Node& r){
for(int i = 0; i<2; ++i)
for(int j = 0; j<2; ++j)
rs.sum[i][j]=0;
rs.l=l.l, rs.r=r.r;
if(l.r*r.l>=0){
rs.sum[0][0]=l.sum[0][1]+r.sum[1][0];
rs.sum[0][1]=l.sum[0][1]+r.sum[1][1];
rs.sum[1][0]=l.sum[1][1]+r.sum[1][0];
rs.sum[1][1]=l.sum[1][1]+r.sum[1][1];
}else{
rs.sum[0][0]=max(l.sum[0][1]+r.sum[0][0],l.sum[0][0]+r.sum[1][0]);
rs.sum[0][1]=max(l.sum[0][1]+r.sum[0][1],l.sum[0][0]+r.sum[1][1]);
rs.sum[1][0]=max(l.sum[1][0]+r.sum[1][0],l.sum[1][1]+r.sum[0][0]);
rs.sum[1][1]=max(l.sum[1][0]+r.sum[1][1],l.sum[1][1]+r.sum[0][1]);
}
rs.sum[0][1]=max(rs.sum[0][1],rs.sum[0][0]);
rs.sum[1][0]=max(rs.sum[1][0],rs.sum[0][0]);
rs.sum[1][1]=max({rs.sum[1][1],rs.sum[0][1],rs.sum[1][0]});
}
void update(int id, int l, int r, int pos, int val){
if(pos<l||r<pos) return;
if(l==r){
sgt[id].l=sgt[id].r+=val;
sgt[id].sum[1][1]=abs(sgt[id].l);
sgt[id].sum[1][0]=sgt[id].sum[0][1]=sgt[id].sum[0][0]=0;
return;
}
int mid=(l+r)>>1;
update(id<<1,l,mid,pos,val);
update(id<<1|1,mid+1,r,pos,val);
Merge(sgt[id],sgt[id<<1],sgt[id<<1|1]);
}
int main()
{
tt;
if(fopen((NAME + ".INP").c_str(), "r")) fo;
cin >> n >> q;
for(int i = 1; i<=n; ++i){
cin >> a[i];
if(i>1) update(1,2,n,i,a[i]-a[i-1]);
}
while(q--){
int l,r,x;
cin >> l >> r >> x;
update(1,2,n,l,x), update(1,2,n,r+1,-x);
cout << sgt[1].sum[1][1] << "\n";
}
}
Compilation message (stderr)
Main.cpp: In function 'int main()':
Main.cpp:3:19: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
3 | #define fo freopen((NAME+".INP").c_str(), "r", stdin), freopen((NAME+".OUT").c_str(), "w", stdout)
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:62:45: note: in expansion of macro 'fo'
62 | if(fopen((NAME + ".INP").c_str(), "r")) fo;
| ^~
Main.cpp:3:63: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
3 | #define fo freopen((NAME+".INP").c_str(), "r", stdin), freopen((NAME+".OUT").c_str(), "w", stdout)
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:62:45: note: in expansion of macro 'fo'
62 | if(fopen((NAME + ".INP").c_str(), "r")) fo;
| ^~
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