Submission #786644

#	Time	Username	Problem	Language	Result	Execution time	Memory
786644		vqpahmad	Money (IZhO17_money)	C++14	100 / 100	351 ms	30668 KiB

money

#include<bits/stdc++.h>
using namespace std;
#define int long long 
#define ll long long
#define pii pair<int,int>
#define F first
#define S second
#define endl '\n'
#define pb push_back
#define sz(a) (int)a.size()
#define all(a) a.begin(),a.end()
const int mod = 1e9 + 7;
const int N = 1e6 + 3;
const ll inf = 1e18;
const int off = (1<<20);
int t[off*2];
int combine(int u,int v){
	return u+v;
}
void update(int i,int u){
	i+=off;
	t[i] = u;
	while (i/=2){
		t[i] = combine(t[i*2],t[i*2+1]);
	}
}
int get(int l, int r, int idx=1, int lo=0, int hi=off){
	if (lo>=r||hi<=l) return 0;
	if (lo>=l&&hi<=r) return t[idx];
	int mi = (lo+hi)/2;
	return combine(get(l,r,idx*2,lo,mi),get(l,r,idx*2+1,mi,hi));
}
int32_t main(){
    ios_base::sync_with_stdio(0);cin.tie(0);
    int n;
    cin >> n;
    vector<int> a(n);
    for (int i=0;i<n;i++){
	    cin >> a[i];
    }
    int ans = 0;
    for (int i=0;i<n;){
	    ans++;
	    int b = i;
	    i++;
	    while (i<n&&a[i]>=a[i-1]&&get(a[b]+1,a[i])==0){
		    i++;
	    }
	    for (int j=b;j<i;j++) update(a[j],1);
    }
    cout << ans << endl;
}

• Subtask 1: 9 / 9
• Subtask 2: 16 / 16
• Subtask 3: 20 / 20
• Subtask 4: 55 / 55