제출 #1283476

#제출 시각아이디문제언어결과실행 시간메모리
1283476uranhishigBaloni (COCI15_baloni)C++20
0 / 100
319 ms8220 KiB
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define all(a) (a).begin(),(a).end()
#define rep(i, n) for(int i = 0; i < (n); i++)


signed main(){
	int n;
	cin >> n;
	vector<int> a(n);
	for (int i = 0; i < n; i++){
		cin >> a[i];
	}
	map<int, int> mp;
	int ans = 0;
	for (int i = 0; i < n; i++) {
		if(mp[a[i]+1] >= 1) {
			mp[a[i]+1]--;
		}
		mp[a[i]]++;
	}
	rep(i, 1e6+1){
		if(mp[a[i]]>0){
			ans++;
		}
	}
	cout << ans;
	return 0;
}
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