Submission #1164562

#	Time	Username	Problem	Language	Result	Execution time	Memory
1164562		Pwo	Money (IZhO17_money)	C++20	0 / 100	0 ms	328 KiB

money

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

int n, a[1000005], p[1000005];

int find(int v) {
	if (p[v] == v) return v;
	return p[v] = find(p[v]);
}

int32_t main() {
	ios::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
	cin >> n;
	for (int i = 1; i <= n; i++) {
		cin >> a[i];
		p[i] = i;
	}
	
	int ans = 0; int c = a[n], j = n;
	while (j >= 0) {
		if (c == 0 || c != a[j]) ans++;
		if (j == 0) break;
		c = find(a[j] - 1);
		p[a[j]] = c;
		j--;
	}
	
	cout << ans;
}

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