#pragma GCC optimize("Ofast,unroll-loops")
#pragma GCC target("avx,avx2,fma")
#include <bits/stdc++.h>
#define fi first
#define se second
#define pb push_back
#define ppb pop_back
#define mp make_pair
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define make_unique(x) sort(all((x))); (x).resize(unique(all((x))) - (x).begin())
typedef long long ll;
typedef long double ld;
using namespace std;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
template<class T> bool umin (T &a, T b) {return a > b ? (a = b, true) : false; }
template<class T> bool umax (T &a, T b) {return a < b ? (a = b, true) : false; }
struct node {
//mask (2^0 * mn_taken + 2^1 * mx_taken)
ll one[4] = {0}; //node is one block
ll two[4][4] = {0}; //node is two blocks
};
node id;
node comb(node a, node b) {
node c = id;
for(int one_a = 0; one_a < 4; one_a++)
for(int one_b = 0; one_b < 4; one_b++) {
if(!(one_a & one_b) || (one_a == 3 && one_b == 3))
umax(c.one[(one_a | one_b)], a.one[one_a] + b.one[one_b]);
umax(c.two[one_a][one_b], a.one[one_a] + b.one[one_b]);
}
for(int i = 0; i < 4; i++)
for(int j = 0; j < 4; j++) {
umax(c.two[i][j], a.two[i][3] + b.two[3][j]);
for(int k = 0; k < 4; k++) {
//one_a, l_b, r_b
if((i & j) == 0 || (i == 3 && j == 3)) {
umax(c.two[(i | j)][k], a.one[i] + b.two[j][k]);
}
//l_a, r_a, one_b
if((j & k) == 0 || (j == 3 && k == 3)) {
umax(c.two[i][(j | k)], a.two[i][j] + b.one[k]);
}
//l_a, r_a, r_b. l_b = (3 ^ r_a)
umax(c.two[i][k], a.two[i][j] + b.two[(3 ^ j)][k]);
}
}
umax(c.two[0][3], c.two[3][3]);
umax(c.two[3][0], c.two[3][3]);
umax(c.two[0][0], c.two[3][3]);
umax(c.two[0][0], c.two[0][3]);
umax(c.two[0][0], c.two[3][0]);
return c;
}
const int N = 2e5 + 42;
node st[4 * N];
ll lazy[4 * N];
void push(int v) {
if(lazy[v]) {
st[(v << 1)].one[1] -= lazy[v];
st[(v << 1)].one[2] += lazy[v];
st[(v << 1) + 1].one[1] -= lazy[v];
st[(v << 1) + 1].one[2] += lazy[v];
for(int l = 0; l < 4; l++)
for(int r = 0; r < 4; r++) {
int add = 0;
if(l == 1) add--;
else if(l == 2) add++;
if(r == 1) add--;
else if(r == 2) add++;
st[(v << 1)].two[l][r] += add * lazy[v];
st[(v << 1) + 1].two[l][r] += add * lazy[v];
}
lazy[(v << 1)] += lazy[v];
lazy[(v << 1) + 1] += lazy[v];
lazy[v] = 0;
}
}
ll a[N];
void build(int v, int tl, int tr) {
if(tl == tr) {
st[v] = id;
st[v].one[0] = 0;
st[v].one[1] = -a[tl];
st[v].one[2] = a[tl];
st[v].one[3] = 0;
st[v].two[3][0] = 0;
st[v].two[2][0] = a[tl];
st[v].two[1][0] = -a[tl];
st[v].two[0][3] = 0;
st[v].two[0][2] = a[tl];
st[v].two[0][1] = -a[tl];
return;
}
int tm = (tl + tr) / 2;
build((v << 1), tl, tm);
build((v << 1) + 1, tm + 1, tr);
st[v] = comb(st[(v << 1)], st[(v << 1) + 1]);
// cout << tl << ' ' << tr << '\n';
// for(int i = 0; i < 4; i++) cout << st[v].one[i] << ' ';
// cout << '\n';
// for(int i = 0; i < 4; i++) {
// for(int j = 0; j < 4; j++) {
// cout << st[v].two[i][j] << ' ';
// }
// cout << '\n';
// }
// cout << '\n';
}
void upd(int v, int tl, int tr, int l, int r, int x) {
if(l > r) return;
if(l == tl && r == tr) {
st[v].one[1] -= x;
st[v].one[2] += x;
for(int l = 0; l < 4; l++)
for(int r = 0; r < 4; r++) {
int add = 0;
if(l == 1) add--;
else if(l == 2) add++;
if(r == 1) add--;
else if(r == 2) add++;
st[v].two[l][r] += add * x;
}
lazy[v] += x;
return;
}
push(v);
int tm = (tl + tr) / 2;
upd((v << 1), tl, tm, l, min(r, tm), x);
upd((v << 1) + 1, tm + 1, tr, max(l, tm + 1), r, x);
st[v] = comb(st[(v << 1)], st[(v << 1) + 1]);
// cout << tl << ' ' << tr << '\n';
// for(int i = 0; i < 4; i++) cout << st[v].one[i] << ' ';
// cout << '\n';
// for(int i = 0; i < 4; i++) {
// for(int j = 0; j < 4; j++) {
// cout << st[v].two[i][j] << ' ';
// }
// cout << '\n';
// }
// cout << '\n';
}
ll stupid(int n) {
vector<ll> ans(n + 1);
for(int i = 0; i < n; i++) {
ll mn = 1e9, mx = -1e9;
for(int j = i + 1; j <= n; j++) {
mn = min(mn, a[j - 1]);
mx = max(mx, a[j - 1]);
ans[j] = max(ans[j], ans[i] + mx - mn);
}
}
return ans[n];
}
void solve() {
for(int i = 0; i < 4; i++) {
id.one[i] = -1e18;
for(int j = 0; j < 4; j++) {
id.two[i][j] = -1e18;
}
id.one[0] = 0;
}
int n, q;
cin >> n >> q;
for(int i = 0; i < n; i++) cin >> a[i];
build(1, 0, n - 1);
while(q--) {
int l, r, x;
// l = rng() % n, r = rng() % n;
// x = rng() % (2 * n) - rng() % n;
// if(l > r) swap(l, r);
cin >> l >> r >> x; l--; r--;
// for(int i = l; i <= r; i++) a[i] += x;
// for(int i = 0; i < n; i++) cout << a[i] << ' ';
// cout << '\n';
upd(1, 0, n - 1, l, r, x);
ll ans = 0;
umax(ans, max(st[1].one[3], st[1].one[0]));
umax(ans, max(st[1].two[0][0], st[1].two[0][3]));
umax(ans, max(st[1].two[3][0], st[1].two[3][3]));
cout << ans << '\n';
// cout << stupid(n) << '\n';
// if(ans != stupid(n)) exit(0);
}
}
int main() {
ios::sync_with_stdio(0); cin.tie(0);
int t = 1;
// cin >> t;
while(t--) solve();
return 0;
}
/*
12 1
25 65 111 108 105 106 75 88 62 34 7 0
1 1 0
20 1
35 62 108 106 122 101 105 79 98 115 156 147 120 90 120 116 116 35 26 -12
1 1 0
*/
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
340 KB |
Output is correct |
| 2 |
Correct |
3 ms |
340 KB |
Output is correct |
| 3 |
Correct |
2 ms |
340 KB |
Output is correct |
| 4 |
Correct |
2 ms |
340 KB |
Output is correct |
| 5 |
Correct |
3 ms |
340 KB |
Output is correct |
| 6 |
Correct |
2 ms |
340 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
340 KB |
Output is correct |
| 2 |
Correct |
3 ms |
340 KB |
Output is correct |
| 3 |
Correct |
2 ms |
340 KB |
Output is correct |
| 4 |
Correct |
2 ms |
340 KB |
Output is correct |
| 5 |
Correct |
3 ms |
340 KB |
Output is correct |
| 6 |
Correct |
2 ms |
340 KB |
Output is correct |
| 7 |
Correct |
30 ms |
1836 KB |
Output is correct |
| 8 |
Correct |
38 ms |
1816 KB |
Output is correct |
| 9 |
Correct |
37 ms |
1812 KB |
Output is correct |
| 10 |
Correct |
39 ms |
1944 KB |
Output is correct |
| 11 |
Correct |
41 ms |
1824 KB |
Output is correct |
| 12 |
Correct |
39 ms |
1836 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
340 KB |
Output is correct |
| 2 |
Correct |
3 ms |
340 KB |
Output is correct |
| 3 |
Correct |
2 ms |
340 KB |
Output is correct |
| 4 |
Correct |
2 ms |
340 KB |
Output is correct |
| 5 |
Correct |
3 ms |
340 KB |
Output is correct |
| 6 |
Correct |
2 ms |
340 KB |
Output is correct |
| 7 |
Correct |
30 ms |
1836 KB |
Output is correct |
| 8 |
Correct |
38 ms |
1816 KB |
Output is correct |
| 9 |
Correct |
37 ms |
1812 KB |
Output is correct |
| 10 |
Correct |
39 ms |
1944 KB |
Output is correct |
| 11 |
Correct |
41 ms |
1824 KB |
Output is correct |
| 12 |
Correct |
39 ms |
1836 KB |
Output is correct |
| 13 |
Execution timed out |
2082 ms |
94208 KB |
Time limit exceeded |
| 14 |
Halted |
0 ms |
0 KB |
- |
