Submission #172130

#	Time	Username	Problem	Language	Result	Execution time	Memory
172130		MvC	Simple game (IZhO17_game)	C++11	100 / 100	82 ms	6936 KiB

game

#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#include <bits/stdc++.h>
#define rc(x) return cout<<x<<endl,0
#define pb push_back
#define mkp make_pair
#define in insert
#define er erase
#define fd find
#define fr first
#define sc second
typedef long long ll;
typedef long double ld;
const ll INF=0x3f3f3f3f3f3f3f3f;
const ll llinf=(1LL<<62);
const int inf=(1<<30);
const int nmax=1e5+50;
const int lim=1e6;
const int mod=1e9+7;
using namespace std;
int n,m,a[nmax],i,x,tp,fw[lim+5];
void upd(int i,int v)
{
	for(;i<=lim;i+=i&(-i))fw[i]+=v;
}
int qry(int i)
{
	int rs=0;
	for(;i>=1;i-=i&(-i))rs+=fw[i];
	return rs;
}
void chg(int l,int r,int _)
{
	if(a[l]>a[r])
	{
		upd(a[r],_);
		upd(a[l]+1,-_);
	}
	else
	{
		upd(a[l],_);
		upd(a[r]+1,-_);
	}
}
int main()
{
	//freopen("sol.in","r",stdin);
	//freopen("sol.out","w",stdout);
	//mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
	ios_base::sync_with_stdio(false);cin.tie(0);cerr.tie(0);cout.tie(0);
	cin>>n>>m;
	for(i=1;i<=n;i++)cin>>a[i];
	for(i=2;i<=n;i++)chg(i-1,i,1);
	while(m--)
	{
		cin>>tp;
		if(tp==1)
		{
			cin>>i>>x;
			if(i>1)chg(i-1,i,-1);
			if(i<n)chg(i,i+1,-1);
			a[i]=x;
			if(i>1)chg(i-1,i,1);
			if(i<n)chg(i,i+1,1);
		}
		else
		{
			cin>>x;
			cout<<qry(x)<<'\n';
		}
	}
	return 0;
}

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