Submission #361971

#	Time	Username	Problem	Language	Result	Execution time	Memory
361971		Galebickosikasa	Foehn Phenomena (JOI17_foehn_phenomena)	C++17	100 / 100	204 ms	13164 KiB

foehn_phenomena

// #pragma GCC optimize("Ofast,no-stack-protector,unroll-loops,fast-math")
// #pragma GCC target("sse,sse2,sse3,ssse3,sse4,sse4.1,sse4.2,popcnt,abm,mmx,avx")
 
#include <iostream>
#include <vector>
#include <cmath>
#include <algorithm>
#include <unordered_map>
#include <set>
#include <map>
#include <queue>
#include <random>
#include <chrono>

#define fi first
#define se second
#define pb push_back
#define ll long long
#define ld long double
#define hm unordered_map 
#define pii pair<int, int>
#define sz(a) (int)a.size()
#define all(a) a.begin(), a.end()
#define cinv(v) for (auto& x: v) cin >> x
#define fr(i, n) for (int i = 0; i < n; ++i)
#define fl(i, l, n) for (int i = l; i < n; ++i)

#define int ll

template <typename T1, typename T2> inline bool chkmin(T1 &x, const T2 &y) {if (x > y) {x = y; return 1;} return 0;}
template <typename T1, typename T2> inline bool chkmax(T1 &x, const T2 &y) {if (x < y) {x = y; return 1;} return 0;}

using namespace std;

#ifdef LOCAL
	#define dbg(x) cerr << #x << " : " << x << '\n'
#else 
	#define dbg(x)
#endif

//tg: @runningcherry
 
template <typename T1, typename T2> ostream& operator << (ostream& out, const pair<T1, T2>& v) {
	out << v.fi << ", " << v.se;
	return out;
}

template<typename T> ostream& operator << (ostream& out, const vector<T>& v) {
	for (auto& x: v) out << x << " ";
	return out;
}

template <typename T1, typename T2> ostream& operator << (ostream& out, const map<T1, T2>& v) {
	for (auto& x: v) out << x << '\n';
	return out;
}

template<typename T> ostream& operator << (ostream& out, const set<T>& v) {
	for (auto& x: v) out << x << " ";
	return out;
}

template<typename T> ostream& operator << (ostream& out, const multiset<T>& v) {
	for (auto& x: v) out << x << " ";
	return out;
}

template <typename T1, typename T2> istream& operator >> (istream& in, pair<T1, T2>& a) {
	in >> a.fi >> a.se;
	return in;
}

const ll inf = (ll) 2e9;
const ld pi = asin (1) * 2;
const ld eps = 1e-8;
const ll mod = (ll)1e9 + 7;
const ll ns = 97;

const int maxn = 2e5 + 20;

mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count());

struct fenw {
	vector<int> t;

	fenw (int n) {
		t = vector<int> (n);
	}

	inline void add (int i, int x) {
		for (; i < sz (t); i += i & -i) t[i] += x;
	}

	inline int get (int i) {
		int ans = 0;
		for (; i > 0; i -= i & -i) ans += t[i];
		return ans;
	}
};

signed main () {
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr);
	cout.tie(nullptr);
	int n, q, s, t;
	cin >> n >> q >> s >> t;
	vector<int> goo (n + 1);
	cinv (goo);
	fenw fen (n + 10);
	int res = 0;
	fl (i, 1, n + 1) {
		fen.add (i, goo[i] - goo[i - 1]);
		if (goo[i - 1] < goo[i]) {
			res -= s * (goo[i] - goo[i - 1]);
		} else {
			res += t * (goo[i - 1] - goo[i]);
		}
	}
	dbg (res);
	while (q--) {
		int l, r, x;
		cin >> l >> r >> x;
		int a = fen.get (l - 1);
		int b = fen.get (l);
		if (a < b) res += s * (b - a);
		else res -= t * (a - b);
		if (r != n) {
			a = fen.get (r);
			b = fen.get (r + 1);
			if (a < b) res += s * (b - a);
			else res -= t * (a - b);
		}
		fen.add (l, x);
		fen.add (r + 1, -x);
		a = fen.get (l - 1);
		b = fen.get (l);
		if (a < b) res -= s * (b - a);
		else res += t * (a - b);
		if (r != n) {
			a = fen.get (r);
			b = fen.get (r + 1);
			if (a < b) res -= s * (b - a);
			else res += t * (a - b);
		}
		cout << res << '\n';
	}





}

• Subtask 1: 30 / 30
• Subtask 2: 10 / 10
• Subtask 3: 60 / 60