// O O O O O O O O O O O O O O O OO O OO O OO O O O TTCH O TTTCH O TTTCH O O O O
#pragma GCC optimize("Ofast")
#pragma GCC optimize("no-stack-protector")
#pragma GCC optimize("unroll-loops")
#pragma GCC optimize("fast-math")
#pragma GCC target("sse,sse2,sse3,ssse3,popcnt,abm,mmx")
#include <iostream>
#include <vector>
#include <algorithm>
#include <set>
#include <map>
#include <unordered_set>
#include <unordered_map>
#include <stdio.h>
#include <cstdio>
#include <math.h>
#include <cmath>
#include <string>
#include <cstring>
#include <queue>
#include <deque>
// #include <random>
#include <iomanip>
#include <bitset>
#include <cassert>
using namespace std;
#define int long long
#define y1 y11
#define less less228
#define left left228
#define right right228
#define list list228
#define all(v) v.begin(), v.end()
#define tm tm228
template<typename T> void uin(T &a, T b) {
if (b < a) a = b;
}
template<typename T> void uax(T &a, T b) {
if (b > a) a = b;
}
const int N = 228228;
const int LG = 20;
int n;
int a[N];
int stmax[N][LG], lg[N];
void pre() {
for (int i = 2; i <= n; ++i) {
lg[i] = lg[i >> 1] + 1;
}
for (int i = 1; i <= n; ++i) {
stmax[i][0] = a[i];
}
for (int k = 1; (1 << k) <= n; ++k) {
for (int i = 1; i <= n - (1 << k) + 1; ++i) {
stmax[i][k] = max(stmax[i][k - 1], stmax[i + (1 << (k - 1))][k - 1]);
}
}
}
int getmax(int l, int r) {
int k = lg[r - l + 1];
return max(stmax[l][k], stmax[r - (1 << k) + 1][k]);
}
pair<int,int> get_segment(int x, int y) {
int l = 0, r = x;
while (r - l > 1) {
int mid = (l + r) >> 1;
if (getmax(mid, x) >= y) l = mid;
else r = mid;
}
pair<int, int> ans = {r, 0};
l = x, r = n + 1;
while (r - l > 1) {
int mid = (l + r) >> 1;
if (getmax(x, mid) >= y) r = mid;
else l = mid;
}
ans.second = l;
return ans;
}
int forx[N];
vector<int> g[N], roots;
vector< pair<int, int> > in[N];
map< pair<int, int>, vector< pair<int,int> > > mp;
int take = 0;
int t[N], ss = 0;
void inc(int i, int dx) {
for (; i < ss; i |= (i + 1)) {
t[i] += dx;
}
}
int gg = 0;
int get(int i) {
gg = 0;
for (; i >= 0; i = (i & (i + 1)) - 1) {
gg += t[i];
}
return gg;
}
void add(int l, int r, int x) {
inc(l, x);
inc(r + 1, -x);
}
int dp[N];
int tin[N], tout[N], timer = 0;
void dfs(int v) {
int sums = 0;
tin[v] = timer++;
for (int to : g[v]) {
dfs(to);
sums += dp[to];
}
tout[v] = timer;
dp[v] = sums;
for (pair<int, int> pa : in[v]) {
int x = pa.first, cost = pa.second;
int down = forx[x];
if (down == -1 || down == v) {
uax(dp[v], sums + cost);
} else {
uax(dp[v], sums + cost + get(tin[down]));
}
}
int val = -dp[v] + sums;
add(tin[v], tout[v], val);
}
vector<int> open[N], close[N];
void BuildTree() {
vector< pair<int, int> > v;
for (auto p : mp) {
v.push_back(p.first);
}
int sz = (int)v.size();
ss = sz + 3;
sort(all(v), [&] (pair<int, int> a, pair<int, int> b) {
return a.first < b.first || (a.first == b.first && a.second > b.second);
});
vector<int> left(sz, -1);
vector<int> st;
for (int i = sz - 1; i + 1; --i) {
while (!st.empty() && v[st.back()].second <= v[i].second) {
left[st.back()] = i;
st.pop_back();
}
st.push_back(i);
}
for (int i = 0; i < sz; ++i) {
for (auto p : mp[v[i]]) {
in[i].push_back(p);
}
}
for (int i = 0; i < sz; ++i) {
if (left[i] != -1) g[left[i]].push_back(i);
else roots.push_back(i);
}
for (int i = 1; i <= n; ++i) {
forx[i] = -1;
}
for (int i = 0; i < sz; ++i) {
open[v[i].first].push_back(i);
close[v[i].second + 1].push_back(i);
}
set<int> S;
for (int x = 1; x <= n; ++x) {
for (int i : open[x]) {
S.insert(i);
}
for (int i : close[x]) {
S.erase(i);
}
if (!S.empty()) forx[x] = *S.rbegin();
else forx[x] = -1;
}
for (int i : roots) {
dfs(i);
take += dp[i];
}
}
signed main() {
ios_base::sync_with_stdio(false);
cin.tie(0);
cin >> n;
for (int i = 1; i <= n; ++i) {
cin >> a[i];
}
pre();
int m;
cin >> m;
int all = 0;
for (int i = 0; i < m; ++i) {
int x, y, c;
cin >> x >> y >> c;
all += c;
pair<int, int> pa = get_segment(x, y);
mp[pa].push_back(make_pair(x, c));
}
BuildTree();
cout << all - take << '\n';
return 0;
}
// RU_023
/*
5
1 3 4 2 3
3
1 5 3
4 3 2
2 4 2
7
5 6 2 3 6 7 6
5
7 7 5
3 3 7
3 7 10
1 7 6
4 7 8
8
6 8 5 7 3 4 2 1
10
8 2 9
6 6 7
8 3 18
5 8 17
8 5 3
5 5 3
5 4 8
1 8 13
1 7 5
7 4 13
*/
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
19 ms |
22016 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
19 ms |
22016 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
19 ms |
22016 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
