Submission #62772

#	Time	Username	Problem	Language	Result	Execution time	Memory
62772		Tenuun	Money (IZhO17_money)	C++17	100 / 100	313 ms	152412 KiB

money

#include<bits/stdc++.h>
 
using namespace std;
 
int tr[1000001], a[1000000];
 
void update(int ind, int val){
	while(ind<=1000000){
		tr[ind]+=val;
		ind+=ind&-ind;
	}
}
 
int get(int ind){
	int ans=0;
	while(ind){
		ans+=tr[ind];
		ind-=ind&-ind;
	}
	return ans;
}
 
int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	memset(tr, 0, sizeof tr);
	int n, res=0, x, start=0, mx=0;
	cin >> n;
	for(int i=0; i<n; i++) cin >> a[i];
	for(int i=0; i<n; i++){
		start=i;
		mx=a[i];
		//cout << i << " ";
		res++;
		while(i+1<n && a[i+1]>=mx && get(a[i+1]-1)-get(a[start])<=0){
			i++;
			mx=max(mx, a[i]);
		}
		for(int j=start; j<=i; j++){
			update(a[j], 1);
		}
	}
	cout << res;
	return 0;
}

Compilation message (stderr)

money.cpp: In function 'int main()':
money.cpp:27:16: warning: unused variable 'x' [-Wunused-variable]
  int n, res=0, x, start=0, mx=0;
                ^

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