結果
問題 | No.1435 Mmm...... |
ユーザー |
|
提出日時 | 2021-03-25 22:18:13 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 39 ms / 2,000 ms |
コード長 | 2,187 bytes |
コンパイル時間 | 2,112 ms |
コンパイル使用メモリ | 203,692 KB |
最終ジャッジ日時 | 2025-01-19 21:45:41 |
ジャッジサーバーID (参考情報) |
judge2 / judge4 |
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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
//#define _GLIBCXX_DEBUG#include <bits/stdc++.h>using namespace std;#define rep(i, n) for(int i=0; i<n; ++i)#define all(v) v.begin(), v.end()#define rall(v) v.rbegin(), v.rend()using ll = int64_t;using ull = uint64_t;using ld = long double;using P = pair<int, int>;using vs = vector<string>;using vi = vector<int>;using vvi = vector<vi>;template<class T> using PQ = priority_queue<T>;template<class T> using PQG = priority_queue<T, vector<T>, greater<T>>;const int INF = 0xccccccc;const ll LINF = 0xcccccccccccccccLL;template<typename T1, typename T2>inline bool chmax(T1 &a, T2 b) {return a < b && (a = b, true);}template<typename T1, typename T2>inline bool chmin(T1 &a, T2 b) {return a > b && (a = b, true);}template<typename T1, typename T2>istream &operator>>(istream &is, pair<T1, T2> &p) { return is >> p.first >> p.second;}template<typename T1, typename T2>ostream &operator<<(ostream &os, const pair<T1, T2> &p) { return os << p.first << ' ' << p.second;}template<class T>struct SWAG {using FX = function<T(T, T)>;stack<pair<T, T>> frst, bcst;FX fx;const T ex;//fx(新, 古)SWAG(FX fx_, T ex_):fx(fx_), ex(ex_) {}void push(T x) {bcst.emplace(x, fx(x, (bcst.empty()?ex:bcst.top().second)));}void pop() {if(frst.empty()) {while(!bcst.empty()) {frst.emplace(bcst.top().first, fx((frst.empty()?ex:frst.top().second), bcst.top().first));bcst.pop();}}assert(!frst.empty());frst.pop();}T calc() {return fx(bcst.empty()?ex:bcst.top().second, frst.empty()?ex:frst.top().second);}};struct S {int m1, m2, M;int calc() {return m1+m2-M;}};//headint main() {ios::sync_with_stdio(false);cin.tie(0);int n;cin >> n;vi a(n);rep(i, n) cin >> a[i];auto fx = [](S a, S b)->S {if(a.m1 > b.m1) swap(a, b);return {a.m1, min(a.m2, b.m1), max(a.M, b.M)};};SWAG<S> s(fx, S({INT_MAX/2, INT_MAX/2, 0}));ll ans = 0;int j = 0;rep(i, n-1) {while(j < n and s.calc().calc() >= 0) {s.push({a[j], INT_MAX/2, a[j]});j++;}ans += j-i-2+(s.calc().calc() >= 0);s.pop();}cout << ans << endl;}