#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
template<typename T> using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
typedef long long int ll;
typedef long double ld;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL)
#define pb push_back
#define endl '\n'
#define sz(a) (int)a.size()
#define setbits(x) __builtin_popcountll(x)
#define ff first
#define ss second
#define conts continue
#define ceil2(x,y) ((x+y-1)/(y))
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define yes cout << "Yes" << endl
#define no cout << "No" << endl
#define rep(i,n) for(int i = 0; i < n; ++i)
#define rep1(i,n) for(int i = 1; i <= n; ++i)
#define rev(i,s,e) for(int i = s; i >= e; --i)
#define trav(i,a) for(auto &i : a)
template<typename T>
void amin(T &a, T b) {
a = min(a,b);
}
template<typename T>
void amax(T &a, T b) {
a = max(a,b);
}
#ifdef LOCAL
#include "debug.h"
#else
#define debug(...) 42
#endif
/*
refs:
https://codeforces.com/blog/entry/101003?#comment-898608
*/
const int MOD = 1e9 + 7;
const int N = 1e5 + 5;
const int inf1 = int(1e9) + 5;
const ll inf2 = ll(1e18) + 5;
template<typename T>
struct lazysegtree {
/*=======================================================*/
struct data {
ll mn,cnt;
};
struct lazy {
ll a;
};
data d_neutral = {inf2,0};
lazy l_neutral = {0};
void merge(data &curr, data &left, data &right) {
curr.mn = min(left.mn,right.mn);
curr.cnt = 0;
if(left.mn == curr.mn) curr.cnt += left.cnt;
if(right.mn == curr.mn) curr.cnt += right.cnt;
}
void create(int x, int lx, int rx, T v) {
tr[x] = {v,1};
}
void modify(int x, int lx, int rx, T v) {
lz[x].a = v;
}
void propagate(int x, int lx, int rx) {
ll v = lz[x].a;
if(!v) return;
tr[x].mn += v;
if(rx-lx > 1){
lz[2*x+1].a += v;
lz[2*x+2].a += v;
}
lz[x] = l_neutral;
}
/*=======================================================*/
int siz = 1;
vector<data> tr;
vector<lazy> lz;
lazysegtree() {
}
lazysegtree(int n) {
while (siz < n) siz *= 2;
tr.assign(2 * siz, d_neutral);
lz.assign(2 * siz, l_neutral);
}
void build(int n, int x, int lx, int rx) {
if (rx - lx == 1) {
if (lx < n) {
create(x, lx, rx, 0);
}
return;
}
int mid = (lx + rx) / 2;
build(n, 2 * x + 1, lx, mid);
build(n, 2 * x + 2, mid, rx);
merge(tr[x], tr[2 * x + 1], tr[2 * x + 2]);
}
void build(int n) {
build(n, 0, 0, siz);
}
void rupd(int l, int r, T v, int x, int lx, int rx) {
propagate(x, lx, rx);
if (lx >= r or rx <= l) return;
if (lx >= l and rx <= r) {
modify(x, lx, rx, v);
propagate(x, lx, rx);
return;
}
int mid = (lx + rx) / 2;
rupd(l, r, v, 2 * x + 1, lx, mid);
rupd(l, r, v, 2 * x + 2, mid, rx);
merge(tr[x], tr[2 * x + 1], tr[2 * x + 2]);
}
void rupd(int l, int r, T v) {
rupd(l, r + 1, v, 0, 0, siz);
}
data query(int l, int r, int x, int lx, int rx) {
propagate(x, lx, rx);
if (lx >= r or rx <= l) return d_neutral;
if (lx >= l and rx <= r) return tr[x];
int mid = (lx + rx) / 2;
data curr;
data left = query(l, r, 2 * x + 1, lx, mid);
data right = query(l, r, 2 * x + 2, mid, rx);
merge(curr, left, right);
return curr;
}
data query(int l, int r) {
return query(l, r + 1, 0, 0, siz);
}
};
template<typename T>
struct segtree {
// https://codeforces.com/blog/entry/18051
/*=======================================================*/
struct data {
ll sum,mnp,mns,val1,val2;
};
data neutral = {0,0,0,inf2,inf2};
data merge(data &left, data &right) {
data curr;
curr.sum = left.sum+right.sum;
curr.mnp = min({left.mnp,left.sum+right.mnp});
curr.mns = min({right.mns,right.sum+left.mns});
curr.val1 = min({left.val1,curr.mnp});
curr.val2 = min({right.val1,curr.mns});
return curr;
}
void create(int i, T v) {
}
void modify(int i, T v) {
tr[i] = {v,-v,-v};
}
/*=======================================================*/
int n;
vector<data> tr;
segtree() {
}
segtree(int siz) {
init(siz);
}
void init(int siz) {
n = siz;
tr.assign(2 * n, neutral);
}
void build(vector<T> &a, int siz) {
rep(i, siz) create(i + n, a[i]);
rev(i, n - 1, 1) tr[i] = merge(tr[i << 1], tr[i << 1 | 1]);
}
void pupd(int i, T v) {
modify(i + n, v);
for (i = (i + n) >> 1; i; i >>= 1) tr[i] = merge(tr[i << 1], tr[i << 1 | 1]);
}
data query(int l, int r) {
data resl = neutral, resr = neutral;
for (l += n, r += n; l <= r; l >>= 1, r >>= 1) {
if (l & 1) resl = merge(resl, tr[l++]);
if (!(r & 1)) resr = merge(tr[r--], resr);
}
return merge(resl, resr);
}
};
void solve(int test_case)
{
ll n; cin >> n;
vector<ll> a(n+5);
rep1(i,n) cin >> a[i];
vector<ll> p(n+5);
rep1(i,n) p[i] = p[i-1]+a[i];
vector<ll> ngel(n+5,-1), nger(n+5,-1);
{
stack<ll> stk;
rep1(i,n){
while(!stk.empty() and a[i] >= a[stk.top()]){
nger[stk.top()] = i;
stk.pop();
}
stk.push(i);
}
}
{
stack<ll> stk;
rev(i,n,1){
while(!stk.empty() and a[i] >= a[stk.top()]){
ngel[stk.top()] = i;
stk.pop();
}
stk.push(i);
}
}
set<pll> pairs;
auto add_pair = [&](ll l, ll r){
if(l > r) swap(l,r);
if(r-l-1 <= 0) return;
ll sum = p[r-1]-p[l];
if(min(a[l],a[r]) > sum){
pairs.insert({l+1,r-1});
}
};
rep1(i,n){
if(ngel[i] != -1){
add_pair(i,ngel[i]);
}
if(nger[i] != -1){
add_pair(i,nger[i]);
}
}
lazysegtree<ll> st(n+5);
st.build(n+1);
for(auto [l,r] : pairs){
st.rupd(l,r,1);
}
segtree<ll> seg(n+5);
rep1(i,n) seg.pupd(i,a[i]);
ll q; cin >> q;
while(q--){
ll t,l,r; cin >> t >> l >> r;
ll pos1 = l, pos2 = r;
{
ll lo = l, hi = r;
while(lo <= hi){
ll mid = (lo+hi) >> 1;
if(p[mid-1]-p[l-1]+seg.query(mid,r).val1 < 0){
pos1 = mid;
lo = mid+1;
}
else{
hi = mid-1;
}
}
}
{
ll lo = l, hi = r;
while(lo <= hi){
ll mid = (lo+hi) >> 1;
if(p[r]-p[mid]+seg.query(l,mid).val2 < 0){
pos2 = mid;
hi = mid-1;
}
else{
lo = mid+1;
}
}
}
ll ans = 0;
if(pos1 <= pos2){
ans = st.query(pos1,pos2).cnt;
}
cout << ans << endl;
}
}
int main()
{
fastio;
int t = 1;
// cin >> t;
rep1(i, t) {
solve(i);
}
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
0 ms |
348 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
348 KB |
Output is correct |
| 2 |
Correct |
58 ms |
22856 KB |
Output is correct |
| 3 |
Correct |
54 ms |
22168 KB |
Output is correct |
| 4 |
Correct |
58 ms |
22864 KB |
Output is correct |
| 5 |
Correct |
52 ms |
22356 KB |
Output is correct |
| 6 |
Correct |
38 ms |
20304 KB |
Output is correct |
| 7 |
Correct |
30 ms |
19024 KB |
Output is correct |
| 8 |
Incorrect |
38 ms |
20300 KB |
Output isn't correct |
| 9 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
0 ms |
348 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
348 KB |
Output is correct |
| 2 |
Correct |
58 ms |
22856 KB |
Output is correct |
| 3 |
Correct |
54 ms |
22168 KB |
Output is correct |
| 4 |
Correct |
58 ms |
22864 KB |
Output is correct |
| 5 |
Correct |
52 ms |
22356 KB |
Output is correct |
| 6 |
Correct |
38 ms |
20304 KB |
Output is correct |
| 7 |
Correct |
30 ms |
19024 KB |
Output is correct |
| 8 |
Incorrect |
38 ms |
20300 KB |
Output isn't correct |
| 9 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
348 KB |
Output is correct |
| 2 |
Correct |
58 ms |
22856 KB |
Output is correct |
| 3 |
Correct |
54 ms |
22168 KB |
Output is correct |
| 4 |
Correct |
58 ms |
22864 KB |
Output is correct |
| 5 |
Correct |
52 ms |
22356 KB |
Output is correct |
| 6 |
Correct |
38 ms |
20304 KB |
Output is correct |
| 7 |
Correct |
30 ms |
19024 KB |
Output is correct |
| 8 |
Incorrect |
38 ms |
20300 KB |
Output isn't correct |
| 9 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
0 ms |
348 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
