結果
| 問題 |
No.1435 Mmm......
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2024-06-02 00:52:36 |
| 言語 | C++23 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 230 ms / 2,000 ms |
| コード長 | 4,844 bytes |
| コンパイル時間 | 4,061 ms |
| コンパイル使用メモリ | 251,556 KB |
| 実行使用メモリ | 9,344 KB |
| 最終ジャッジ日時 | 2024-12-22 16:34:49 |
| 合計ジャッジ時間 | 7,820 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 24 |
ソースコード
#line 1 "cp_templates/template/template.hpp"
# include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ull = unsigned long long;
const double pi = acos(-1);
template<class T>constexpr T inf() { return ::std::numeric_limits<T>::max(); }
template<class T>constexpr T hinf() { return inf<T>() / 2; }
template <typename T_char>T_char TL(T_char cX) { return tolower(cX); }
template <typename T_char>T_char TU(T_char cX) { return toupper(cX); }
template<class T> bool chmin(T& a,T b) { if(a > b){a = b; return true;} return false; }
template<class T> bool chmax(T& a,T b) { if(a < b){a = b; return true;} return false; }
int popcnt(unsigned long long n) { int cnt = 0; for (int i = 0; i < 64; i++)if ((n >> i) & 1)cnt++; return cnt; }
int d_sum(ll n) { int ret = 0; while (n > 0) { ret += n % 10; n /= 10; }return ret; }
int d_cnt(ll n) { int ret = 0; while (n > 0) { ret++; n /= 10; }return ret; }
ll gcd(ll a, ll b) { if (b == 0)return a; return gcd(b, a%b); };
ll lcm(ll a, ll b) { ll g = gcd(a, b); return a / g*b; };
ll MOD(ll x, ll m){return (x%m+m)%m; }
ll FLOOR(ll x, ll m) {ll r = (x%m+m)%m; return (x-r)/m; }
template<class T> using dijk = priority_queue<T, vector<T>, greater<T>>;
# define all(qpqpq) (qpqpq).begin(),(qpqpq).end()
# define UNIQUE(wpwpw) (wpwpw).erase(unique(all((wpwpw))),(wpwpw).end())
# define LOWER(epepe) transform(all((epepe)),(epepe).begin(),TL<char>)
# define UPPER(rprpr) transform(all((rprpr)),(rprpr).begin(),TU<char>)
# define rep(i,upupu) for(ll i = 0, i##_len = (upupu);(i) < (i##_len);(i)++)
# define reps(i,opopo) for(ll i = 1, i##_len = (opopo);(i) <= (i##_len);(i)++)
# define len(x) ((ll)(x).size())
# define bit(n) (1LL << (n))
# define pb push_back
# define exists(c, e) ((c).find(e) != (c).end())
struct INIT{
INIT(){
std::ios::sync_with_stdio(false);
std::cin.tie(0);
cout << fixed << setprecision(20);
}
}INIT;
namespace mmrz {
void solve();
}
int main(){
mmrz::solve();
}
#line 1 "cp_templates/data_structure/segment_tree.hpp"
template<typename T>struct segment_tree {
using F = function<T(T, T)>;
int offset;
int n;
vector<T> node;
F combine;
T identify;
segment_tree(vector<T> v, F _combine, T _identify) : combine(_combine), identify(_identify) {
n = (int)v.size();
offset = 1;
while(offset < n)offset <<= 1;
node.resize(2*offset, identify);
for(int i = 0;i < n;i++)node[i + offset] = v[i];
for(int i = offset - 1;i >= 1;i--)node[i] = combine(node[2 * i + 0], node[2 * i + 1]);
}
segment_tree(int _n, F _combine, T _identify) : n(_n), combine(_combine), identify(_identify){
offset = 1;
while(offset < _n)offset <<= 1;
node.assign(2*offset, identify);
}
T operator[](int x) {return node[x + offset]; }
void set(int x, T val){
x += offset;
node[x] = val;
while(x >>= 1){;
node[x] = combine(node[2 * x + 0], node[2 * x + 1]);
}
}
T fold(int a, int b){
T L = identify, R = identify;
for(a += offset, b += offset; a < b;a >>= 1, b >>= 1){
if(a&1)L = combine(L, node[a++]);
if(b&1)R = combine(node[--b], R);
}
return combine(L, R);
}
int max_right(const function<bool(T)> f, int l = 0){
if(l == n)return n;
l += offset;
T sum = identify;
do{
while(l%2 == 0)l >>= 1;
if(not f(combine(sum, node[l]))){
while(l < offset){
l <<= 1;
if(f(combine(sum, node[l]))){
sum = combine(sum, node[l]);
++l;
}
}
return l - offset;
}
sum = combine(sum, node[l]);
++l;
}while((l&-l) != l);
return n;
}
int min_left(const function<bool(T)> f, int r = -1){
if(r == 0)return 0;
if(r == -1)r = n;
r += offset;
T sum = identify;
do{
--r;
while(r > 1 && (r % 2))r >>= 1;
if(not f(combine(node[r], sum))){
while(r < offset){
r = r*2 + 1;
if(f(combine(node[r], sum))){
sum = combine(node[r], sum);
--r;
}
}
return r+1 - offset;
}
sum = combine(node[r], sum);
}while((r&-r) != r);
return 0;
}
};
#line 3 "1435.cpp"
using namespace mmrz;
struct s{
int m1, m2, mx;
s(int _m1, int _m2, int _mx) : m1(_m1), m2(_m2), mx(_mx) {}
};
void SOLVE(){
int n;
cin >> n;
segment_tree<s> seg(n, [](s l, s r) -> s {
int m1 = min(l.m1, r.m1);
int m2 = min({max(l.m1, r.m1), l.m2, r.m2});
int mx = max(l.mx, r.mx);
return s{m1, m2, mx};
}, s{hinf<int>(), hinf<int>(), -1});
rep(i, n){
int a;
cin >> a;
seg.set(i, s{a, hinf<int>(), a});
}
ll ans = 0;
auto check = [&](const s x) -> bool {
return (x.m1 + x.m2 >= x.mx);
};
rep(l, n){
int r = seg.max_right(check, l);
ans += max<int>(0, r-l-1);
}
rep(r, n){
int l = seg.max_right(check, r+1);
ans += max<int>(0, (r + 1) - l - 1);
}
cout << ans << endl;
}
void mmrz::solve(){
int t = 1;
//cin >> t;
while(t--)SOLVE();
}