Submission #888253

#	Time	Username	Problem	Language	Result	Execution time	Memory
888253		pcc	Money (IZhO17_money)	C++14	0 / 100	1 ms	6616 KiB

money

#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define pll pair<ll,ll>
#define pii pair<int,int>
#define fs first
#define sc second
#define tlll tuple<ll,ll,ll>
#define tiii tuple<int,int,int>


const int mxn = 1e6+10;

pii arr[mxn];
int n;
int bit[mxn];
vector<int> all;
int cnt[mxn];

void modify(int p,int val){
	for(;p<mxn;p+=p&-p)bit[p] += val;
	return;
}
int getval(int p){
	int re = 0;
	for(;p>0;p-= p&-p)re += bit[p];
	return re;
}


int main(){
	ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	cin>>n;
	for(int i = 1;i<=n;i++){
		cin>>arr[i].fs;
		all.push_back(arr[i].fs);
		arr[i].sc = ++cnt[arr[i].fs];
	}
	sort(all.begin(),all.end());
	all.resize(unique(all.begin(),all.end())-all.begin());
	for(int i = 1;i<=n;i++){
		arr[i].fs = lower_bound(all.begin(),all.end(),arr[i].fs)-all.begin()+1;
	}
	int ans = 0;
	for(int i = n;i>=1;){
		int now = arr[i].fs-getval(arr[i].fs);
		int pt = i;
		int tval = arr[pt].fs-getval(arr[pt].fs);
		while(pt>0&&(tval == now||tval == now-1)){
			now = tval;
			pt--;
			tval = arr[pt].fs-getval(arr[pt].fs);
			//cout<<pt<<":"<<tval<<endl;
		}
		//cout<<pt<<' '<<i<<":"<<tval<<','<<now<<endl;
		while(i>pt){
			if(arr[i].sc == 1)modify(arr[i].fs,1);
			i--;
		}
		ans++;
	}
	cout<<ans;
}

• Subtask 1: 0 / 9
• Subtask 2: 0 / 16
• Subtask 3: 0 / 20
• Subtask 4: 0 / 55