#include <algorithm>
#include <iostream>
#include <string>
#include <vector>
#include <queue>
#include <stack>
#include <map>
#include <set>
#include <cmath>
using namespace std;
typedef long long ll;
typedef pair<ll, ll> pii;
const ll MOD = 1e9 + 7;
//Task Sjeckanje
//COCI 2021: https://oj.uz/problem/view/COCI21_sjeckanje
ll n, q;
ll lazy[800020];
bool mark[800020];
void push(ll v) {
if (mark[v]) {
lazy[2 * v] += lazy[v];
lazy[2 * v + 1] += lazy[v];
lazy[v] = 0;
mark[v] = false;
mark[2 * v] = true;
mark[2 * v + 1] = true;
}
}
void update(ll v, ll tl, ll tr, ll l, ll r, ll x) {
if (l > r) return;
if (l <= tl && r >= tr) {
lazy[v] += x;
mark[v] = true;
return;
}
push(v);
ll mid = (tl + tr) / 2;
update(2 * v, tl, mid, max(l, tl), min(r, mid), x);
update(2 * v + 1, mid + 1, tr, max(l, mid + 1), min(r, tr), x);
} void update(ll l, ll r, ll x) { update(1, 0, n-1, l, r, x); }
ll get(ll v, ll tl, ll tr, ll x) {
if (tl == tr) return lazy[v];
push(v);
ll mid = (tl + tr) / 2;
if (x <= mid) return get(2 * v, tl, mid, x);
else return get(2 * v + 1, mid + 1, tr, x);
} ll get(ll x) { return get(1, 0, n-1, x);}
struct node {
ll lt; //0 if non-decreasing, 1 if decreasing
ll rt; //0 if non-decreasing, 1 if decreasing
ll sum;
bool eq;
node(ll l = 0, ll r = 0, ll s = 0, bool e = false) : lt(l), rt(r), sum(s), eq(e) {};
};
node seg[800020];
void upd(ll v, ll tl, ll tr, ll l, ll r, ll x) {
if (l > r) return;
if (l <= tl && r >= tr) {
return;
}
ll mid = (tl + tr) / 2;
upd(2 * v, tl, mid, max(l, tl), min(r, mid), x);
upd(2 * v + 1, mid + 1, tr, max(mid + 1, l), min(tr, r), x);
ll a = get(mid);
ll b = get(mid + 1);
if (tr - tl == 1) {
seg[v].eq = false;
if (b < a) {
seg[v].lt = 1;
seg[v].rt = 0;
}
if (b > a) {
seg[v].lt = 0;
seg[v].rt = 1;
}
if (a == b) {
seg[v].eq = true;
seg[v].lt = -1;
seg[v].rt = -1;
}
seg[v].sum = abs(a - b);
return;
}
seg[v].eq = seg[2 * v].eq & seg[2 * v + 1].eq;
if (a != b && seg[v].eq) {
seg[v].eq = false;
if (a < b) {
seg[v].lt = 0;
seg[v].rt = 1;
}
if (a > b) {
seg[v].lt = 1;
seg[v].rt = 0;
}
seg[v].sum = abs(b - a);
return;
}
seg[v].lt = seg[2 * v].lt;
seg[v].rt = seg[2 * v + 1].rt;
if ((seg[v].lt == -1 || seg[v].rt == -1) && !(seg[v].eq)) {
if (seg[v].lt == -1) {
if (a > b) seg[v].lt = 1;
if (a < b) seg[v].lt = 0;
if (a == b) seg[v].lt = seg[2 * v + 1].lt;
}
if (seg[v].rt == -1) {
if (a > b) seg[v].rt = 0;
if (a < b) seg[v].rt = 1;
if (a == b) seg[v].rt = seg[2 * v].rt;
}
}
seg[v].sum = seg[2 * v].sum + seg[2 * v + 1].sum;
if (seg[2 * v].rt == 0 && seg[2 * v + 1].lt == 0) {
if (a > b && a > get(mid + 2)) seg[v].sum = seg[2 * v].sum + seg[2 * v + 1].sum + a - get(mid + 2);
if (a < b && b > get(mid - 1)) seg[v].sum = seg[2 * v].sum + seg[2 * v + 1].sum + b - get(mid - 1);
}
if (seg[2 * v].rt == 1 && seg[2 * v + 1].lt == 1) {
if (a > b && get(mid - 1) > b) seg[v].sum = seg[2 * v].sum + seg[2 * v + 1].sum + get(mid - 1) - b;
if (a < b && get(mid + 2) > a) seg[v].sum = seg[2 * v].sum + seg[2 * v + 1].sum + get(mid + 2) - a;
}
if (seg[2 * v].rt == 0 && seg[2 * v + 1].lt == 1) {
if (a > b) seg[v].sum = seg[2 * v].sum + seg[2 * v + 1].sum + a - b;
if (a < b && get(mid + 2) > get(mid - 1)) seg[v].sum = seg[2 * v].sum + seg[2 * v + 1].sum + get(mid + 2) - get(mid - 1);
}
if (seg[2 * v].rt == 1 && seg[2 * v + 1].lt == 0) {
if (a < b) seg[v].sum = seg[2 * v].sum + seg[2 * v + 1].sum + b - a;
if (a > b && get(mid - 1) > get(mid + 2)) seg[v].sum = seg[2 * v].sum + seg[2 * v + 1].sum + get(mid - 1) - get(mid + 2);
}
if (!seg[v].eq) {
if (seg[2 * v].eq) {
if (seg[2 * v + 1].lt == 0) {
if (a < b) seg[v].sum = seg[2 * v].sum + seg[2 * v + 1].sum + b - a;
if (a > b && a > get(mid + 2)) seg[v].sum = seg[2 * v].sum + seg[2 * v + 1].sum + a - get(mid + 2);
}
if (seg[2 * v + 1].lt == 1) {
if (a > b) seg[v].sum = seg[2 * v].sum + seg[2 * v + 1].sum + a - b;
if (a < b && a < get(mid + 2)) seg[v].sum = seg[2 * v].sum + seg[2 * v + 1].sum + get(mid + 2) - a;
}
}
if (seg[2 * v + 1].eq) {
if (seg[2 * v].rt == 0) {
if (b < a) seg[v].sum = seg[2 * v].sum + seg[2 * v + 1].sum + a - b;
if (b > a && b > get(mid - 1)) seg[v].sum = seg[2 * v].sum + seg[2 * v + 1].sum + b - get(mid - 1);
}
if (seg[2 * v].rt == 1) {
if (b > a) seg[v].sum = seg[2 * v].sum + seg[2 * v + 1].sum + b - a;
if (b < a && get(mid - 1) > b) seg[v].sum = seg[2 * v].sum + seg[2 * v + 1].sum + get(mid - 1) - b;
}
}
}
}
void upd(ll l, ll r, ll x) {
update(l, r, x);
upd(1, 0, n-1, l, r, x);
}
void build(ll v, ll tl, ll tr) {
ll mid = (tl + tr) / 2;
seg[v].eq = true;
seg[v].lt = -1;
seg[v].rt = -1;
seg[v].sum = 0;
if (tl != tr) {
build(2 * v, tl, mid);
build(2 * v + 1, mid + 1, tr);
}
}
int main() {
ios::sync_with_stdio(0);
cin.tie(0);
cin >> n >> q;
build(1, 0, n - 1);
for (ll i = 0; i < n; ++i) {
ll x;
cin >> x;
upd(i, i, x);
}
cout << seg[1].sum << endl;
for (ll i = 0; i < q; ++i) {
ll l, r, x;
cin >> l >> r >> x;
upd(l-1, r-1, x);
cout << seg[1].sum << endl;
}
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
12 ms |
25292 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
12 ms |
25292 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
12 ms |
25292 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
