Submission #1134028

#	Time	Username	Problem	Language	Result	Execution time	Memory
1134028		zhasyn	Simple game (IZhO17_game)	C++20	100 / 100	81 ms	5188 KiB

game

#include <bits/stdc++.h>
#define pb push_back
#define pf push_front
using namespace std;
#define F first
#define S second
typedef long long ll;
#define pii pair <int, int>
#define pll pair <ll, ll>
typedef long double ld;
const ll N = 1e6 + 1000, M = 1e6 + 10, len = 315, inf = 1e18;
const ll mod = 1e9 + 7;
ll um(ll a, ll b){
	return (1LL * a * b) % mod;
}
ll subr(ll a, ll b){
	return ((1LL * a - b) % mod + mod) % mod;
}
int a[N], n, m, fen[N];
void upd(int i, int delta){
	for(; i < N; i = (i | (i + 1))){
		fen[i] += delta;
	}
}
int get(int r){
	int res = 0;
	for(; r >= 0; r = (r & (r + 1)) - 1){
		res += fen[r];
	}
	return res;
}
void make(int a, int b, int d){
	upd(min(a, b), d);
	upd(max(a, b), -d);
}
int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr);
	cout.tie(nullptr);
	cin >> n >> m;
	for(int i = 1; i <= n; i++){
		cin >> a[i];
		if(i > 1) make(a[i - 1], a[i], 1);
	}
	for(int i = 0, code, x, pos; i < m; i++){
		cin >> code >> x;
		if(code == 2){
			cout << get(x) << endl;
		} else{
			cin >> pos;
			if(x > 1) make(a[x - 1], a[x], -1);
			if(x < n) make(a[x], a[x + 1], -1);
			a[x] = pos;
			if(x > 1) make(a[x - 1], a[x], 1);
			if(x < n) make(a[x], a[x + 1], 1);
		}
	}
  return 0;
}

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