Submission #483510

#	Time	Username	Problem	Language	Result	Execution time	Memory
483510		ak2006	Simple game (IZhO17_game)	C++14	100 / 100	211 ms	7064 KiB

game

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using vb = vector<bool>;
using vvb = vector<vb>;
using vi = vector<int>;
using vvi = vector<vi>;
using vl = vector<ll>;
using vvl = vector<vl>;
using vc = vector<char>;
using vvc = vector<vc>;
using vs = vector<string>;
const ll mod = 1e9 + 7,inf = 1e18;
#define pb push_back
#define fast ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
void setIO()
{
    fast;
}
vi bit(1e6 + 1);
void add(int i,int v)
{
    for (;i<=1e6;i += i & (-i))bit[i] += v;
}
void add(int l,int r,int v)
{
    add(l,v);
    add(r + 1,-v);
}
int get(int i)
{
    int ret = 0;
    for (;i>0;i -= i &(-i))ret += bit[i];
    return ret;
}
int main()
{
    setIO();
    int n,q;
    cin>>n>>q;
    vi h(n + 1);
    for (int i = 1;i<=n;i++){
        cin>>h[i];
        if (i >= 2)
            add(min(h[i - 1],h[i]),max(h[i - 1],h[i]),1);
    }
    while (q--){
        int t;
        cin>>t;
        if (t == 1){
            int p,v;
            cin>>p>>v;
            if (p >= 2)
                add(min(h[p - 1],h[p]),max(h[p - 1],h[p]),-1);
            if (p < n)
                add(min(h[p],h[p + 1]),max(h[p],h[p + 1]),-1);
            h[p] = v;
            if (p >= 2)
                add(min(h[p - 1],h[p]),max(h[p - 1],h[p]),1);
            if (p < n)
                add(min(h[p],h[p + 1]),max(h[p],h[p + 1]),1);
        }
        else{
            int H;
            cin>>H;
            cout<<get(H)<<endl;
        }
    }
    return 0;
}

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