Submission #572880

#	Time	Username	Problem	Language	Result	Execution time	Memory
572880		vovamr	Simple game (IZhO17_game)	C++17	100 / 100	68 ms	6840 KiB

game

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define fi first
#define se second
#define ll long long
#define ld long double
#define sz(x) ((int)(x).size())
#define all(x) 	(x).begin(), (x).end()
#define pb push_back
#define mpp make_pair
#define ve vector
using namespace std;
using namespace __gnu_pbds;
template<class T> using oset = tree<T,null_type,less<T>,rb_tree_tag,tree_order_statistics_node_update>;
const ll inf = 1e18; const int iinf = 1e9;
typedef pair<ll, ll> pll;
typedef pair<int, int> pii;
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
template <typename T> inline bool chmin(T& a, T b) { return (a > b ? a = b, 1 : 0); }
template <typename T> inline bool chmax(T& a, T b) { return (a < b ? a = b, 1 : 0); }

const int N = 1e6 + 100; int f[N];
inline void upd(int i, int x) { i += 3; for (; i < N; i += i & -i) f[i] += x; }
inline int get(int i) { i += 3; int ans = 0; for (; i; i -= i & -i) { ans += f[i]; } return ans; }

inline void solve() {
	int n, q;
	cin >> n >> q;
	ve<int> a(n);
	for (auto &i : a) cin >> i;

	auto add = [&](int i) {
		int l = min(a[i - 1], a[i]);
		int r = max(a[i - 1], a[i]);
		upd(l, +1), upd(r + 1, -1);
	};
	auto del = [&](int i) {
		int l = min(a[i - 1], a[i]);
		int r = max(a[i - 1], a[i]);
		upd(l, -1), upd(r + 1, +1);
	};

	for (int i = 1; i < n; ++i) add(i);

	while (q--) {
		int e;
		cin >> e;
		if (e == 1) {
			int i, x;
			cin >> i >> x, --i;
			if (i) del(i);
			if (i + 1 < n) del(i + 1);
			a[i] = x;
			if (i) add(i);
			if (i + 1 < n) add(i + 1);
		}
		else {
			int x;
			cin >> x;
			cout << get(x) << '\n';
		}
	}
}

signed main() {
	ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
	int q = 1; // cin >> q;
	while (q--) solve();
	cerr << fixed << setprecision(3) << "Time execution: " << (double)clock() / CLOCKS_PER_SEC << endl;
}

• Subtask 1: 22 / 22
• Subtask 2: 27 / 27
• Subtask 3: 51 / 51