제출 #227629

#제출 시각아이디문제언어결과실행 시간메모리
227629bensonlzlBaloni (COCI15_baloni)C++14
100 / 100
78 ms7416 KiB
#include <bits/stdc++.h>

using namespace std;

int N, H[1000005], arrow[1000005], tot = 0;

int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	cin >> N;
	for (int i = 1; i <= N; ++i){
		cin >> H[i];
		if (!arrow[H[i]]){
			tot++;
			arrow[H[i]-1]++;
		}
		else{
			arrow[H[i]]--;
			arrow[H[i]-1]++;
		}
	}
	cout << tot << '\n';
}
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