Submission #486349

#	Time	Username	Problem	Language	Result	Execution time	Memory
486349		Sho10	Simple game (IZhO17_game)	C++17	100 / 100	80 ms	11116 KiB

game

#include <bits/stdc++.h> //Andrei Alexandru a.k.a Sho
#define ll long long
#define double long double
#pragma GCC optimize("O3")
#pragma GCC optimize("Ofast")
#define aint(a) (a).begin(), (a).end()
#define f first
#define s second
#define pb push_back
#define mp make_pair
#define pi pair
#define rc(s) return cout<<s,0
#define endl '\n'
#define mod 998244353
#define PI 3.14159265359
#define INF 1000000005
#define LINF 1000000000000000005ll
#define CODE_START  ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
using namespace std;
ll n,m,h[100005],bit[1000005],mxx=1000000;
void upd(ll pos,ll val){
for(;pos<=mxx;pos+=pos&(-pos)){
    bit[pos]+=val;
}
}
void update(ll x,ll y,ll val){
if(x>y){
    swap(x,y);
}
upd(x,val);
upd(y+1,-val);
}
ll query(ll pos){
ll res=0;
for(;pos;pos-=pos&(-pos)){
    res+=bit[pos];
}
return res;
}
int32_t main(){
CODE_START;
cin>>n>>m;
for(ll i=1;i<=n;i++)
{
    cin>>h[i];
    if(i>=2){
        update(h[i],h[i-1],1ll);
    }
}
while(m--){
    ll type;
    cin>>type;
    if(type==2){
        ll pos;
        cin>>pos;
        cout<<query(pos)<<endl;
    }else if(type==1){
    ll pos,val;
    cin>>pos>>val;
    ll i=pos;
    if(pos>=2){
update(h[i],h[i-1],-1);
    }
    if(pos<n){
        update(h[i],h[i+1],-1);
    }
    h[i]=val;
    if(pos>=2){
        update(h[i],h[i-1],1);
    }
    if(pos<n){
        update(h[i],h[i+1],1);
    }
}
}
}

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