#include <bits/extc++.h>
using namespace std;
using namespace __gnu_pbds;
#ifdef _DEBUG
#define dout(x) clog << "Line " << __LINE__ << ": " << #x << "=" << (x) << el
#else
#define dout(x)
#endif
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
#define uid(a,b) uniform_int_distribution<int>(a,b)(rng)
#define ins insert
#define ssize(x) (int((x).size()))
#define bs(args...) binary_search(args)
#define lb(args...) lower_bound(args)
#define ub(args...) upper_bound(args)
#define all(x) (x).begin(),(x).end()
#define mp(a, b) make_pair(a, b)
#define mt(args...) make_tuple(args)
#define pb(x) push_back(x)
#define eb(args...) emplace_back(args)
#define ff first
#define ss second
#define die exit(0)
template<typename T>
using vc = vector<T>;
template<typename T>
using uset = unordered_set<T>;
template<typename A, typename B>
using umap = unordered_map<A, B>;
template<typename T, typename Comp>
using pq = std::priority_queue<T, vc<T>, Comp>;
template<typename T>
using maxpq = pq<T, less<T>>;
template<typename T>
using minpq = pq<T, greater<T>>;
template<typename T>
using oset = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
using db = double;
using ld = long double;
using ll = long long;
using ull = unsigned long long;
using pi = pair<int, int>;
using pll = pair<ll, ll>;
using vi = vc<int>;
using vll = vc<ll>;
using vpi = vc<pi>;
using vpll = vc<pll>;
using str = string;
constexpr char el = '\n';
constexpr char sp = ' ';
constexpr int inf = 0x3f3f3f3f;
constexpr ll llinf = 0x3f3f3f3f3f3f3f3fLL;
// ---------------------------------------------------------------------
const int N = 8e5+5;
int n, n2, q, x[N], m[N];
ll a[N], b[N], c[N], d[N];
void evan(int i, int l, int r){
if(i>=n)
return;
m[i] = (l+r)/2;
evan(2*i, l, m[i]);
evan(2*i+1, m[i]+1, r);
}
void pull(int i){
a[i] = max({b[2*i]+a[2*i+1],a[2*i]+c[2*i+1],b[2*i]+c[2*i+1]});
b[i] = max({b[2*i]+b[2*i+1],a[2*i]+d[2*i+1],b[2*i]+d[2*i+1]});
c[i] = max({d[2*i]+a[2*i+1],c[2*i]+c[2*i+1],d[2*i]+c[2*i+1]});
d[i] = max({d[2*i]+b[2*i+1],c[2*i]+d[2*i+1],a[2*i]+d[2*i+1]});
if(x[m[i]]<0&&x[m[i]+1]>0 || x[m[i]]>0&&x[m[i]+1]<0)
return;
a[i] = max(a[i], a[2*i]+a[2*i+1]);
b[i] = max(b[i], a[2*i]+b[2*i+1]);
c[i] = max(c[i], c[2*i]+a[2*i+1]);
d[i] = max(d[i], c[2*i]+d[2*i+1]);
}
void upd(int i, int v){
x[i] += v;
a[i] = abs(x[i]);
d[i] = 0;
b[i] = c[i] = -inf;
for(i /= 2; i > 0; i /= 2)
pull(i);
}
void upd(int l, int r, int v){
l += n-1;
r += n-1;
if(l>n)
upd(l-1, -v);
if(r<n+n2-1)
upd(r, v);
}
signed main() {
ios::sync_with_stdio(0); cin.tie(0);
cout << fixed; clog << fixed; clog << unitbuf;
#ifdef _DEBUG
freopen("input.txt", "r", stdin);
freopen("output.txt", "w", stdout);
freopen("debug.txt", "w", stderr);
#else
//freopen(".in", "r", stdin);
//freopen(".out", "w", stdout);
#endif
cin >> n2 >> q;
n = 1;
while(n<n2)
n *= 2;
evan(1, n, 2*n-1);
for(int i = n; i < n+n2; ++i)
cin >> x[i];
for(int i = n; i + 1 < 2*n; ++i) {
x[i] -= x[i + 1];
a[i] = abs(x[i]);
b[i] = c[i] = -inf;
}
x[n+n2-1] = 0;
b[n+n2-1] = c[n+n2-1] = -inf;
for(int i = n-1; i > 0; --i)
pull(i);
while(q--){
int l, r, v;
cin >> l >> r >> v;
upd(l, r, v);
dout(a[1]);
dout(b[1]);
dout(c[1]);
dout(d[1]);
cout << max({a[1], b[1], c[1], d[1]}) << el;
}
}
Compilation message
Main.cpp: In function 'void pull(int)':
Main.cpp:79:17: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
79 | if(x[m[i]]<0&&x[m[i]+1]>0 || x[m[i]]>0&&x[m[i]+1]<0)
| ~~~~~~~~~^~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
332 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
332 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
332 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
