Submission #687348

#	Time	Username	Problem	Language	Result	Execution time	Memory
687348		pragmatist	Simple game (IZhO17_game)	C++17	100 / 100	164 ms	11140 KiB

game

/*
#pragma comment(linker, "/stack:200000000")
#pragma GCC optimize("O3")
#pragma GCC target ("avx2")
#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmn,avx,tune=native")
#pragma GCC optimize("unroll-loops")
*/

#pragma GCC target("avx2", "bmi", "bmi2", "lzcnt", "popcnt")

#include<bits/stdc++.h>
 
#define sz(v) (int)v.size()
#define ll long long
#define pb push_back
#define x first
#define y second
#define all(v) v.begin(), v.end()
#define rall(v) v.rbegin(), v.rend()
#define nl "\n"

using namespace std;
using pii = pair<int, int>;

const int N = (int)1e6 + 7; // make sure this is right
const int inf = (int)1e9;
const ll INF = (ll)3e18 + 7; 
const ll MOD = (ll)1e9 + 7; // make sure this is right

pii dir[] = {{1, 0}, {0, 1}, {-1, 0}, {0, -1}};

int sum(int x, int y) {
	x += y;
	if(x >= MOD) x -= MOD;
	return x;
}

int mult(int x, int y) {
	return 1ll * x * y % MOD;
}

int n, q, a[N], lim;
int t[4 * N];

void upd(int v, int tl, int tr, int l, int r, int x) {
	if(tl >= l && tr <= r) {
		t[v] += x;
		return;
	}
	if(tl > r || l > tr)
		return;
	int mid = (tl + tr) >> 1;
	upd(v * 2, tl, mid, l, r, x);
	upd(v * 2 + 1, mid + 1, tr, l, r, x);
}

int get(int v, int tl, int tr, int id) {
	if(tl == tr) {
		return t[v];
	}
	int mid = (tl + tr) >> 1;
	if(id <= mid)
		return t[v] + get(v * 2, tl, mid, id);
	else
		return t[v] + get(v * 2 + 1, mid + 1, tr, id);	
}

void solve() {
	cin >> n >> q;
	for(int i = 1; i <= n; ++i) cin >> a[i];
	lim = 1e6;
	for(int i = 2; i <= n; ++i) {
		int l = min(a[i - 1], a[i]), r = max(a[i - 1], a[i]);
		upd(1, 1, lim, l, r, 1);	
	}
	while(q--) {
		char tp;
		cin >> tp;
		if(tp == '1') {
			int id, val;
			cin >> id >> val;
			for(auto x : {-1, 1}) {
				int j = id + x;
				if(j >= 1 && j <= n) {
					int l = min(a[j], a[id]), r = max(a[j], a[id]);
					upd(1, 1, lim, l, r, -1);
				}
			}
			a[id] = val;
			for(auto x : {-1, 1}) {
				int j = id + x;
				if(j >= 1 && j <= n) {
					int l = min(a[j], a[id]), r = max(a[j], a[id]);
					upd(1, 1, lim, l, r, 1);
				}
			}
		} else {
			int h;
			cin >> h;
			cout << get(1, 1, lim, h) << "\n";
		}
	}
}

signed main() {	
	ios_base::sync_with_stdio(0);
	cin.tie(0); 
	int test = 1;
	//cin >> test;
	for(int i = 1; i <= test; ++i) {
	 	//cout << "Case #" << i << ": ";
		solve();
	}
	return 0;
}	

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