제출 #506104

#제출 시각아이디문제언어결과실행 시간메모리
506104MurotYBaloni (COCI15_baloni)C++14
100 / 100
330 ms480 KiB
#include<bits/stdc++.h>
#define ios ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define ll long long 
#define ff first
#define ss second
using namespace std;
const int N=1e6+7;
ll a[N];
int main()
{
	ll n , ans=0;
	cin >> n;
	map <ll,ll> mp;
	for (int i=1;i<=n;i++){
		int x;
		cin >> x;
		if (mp[x] == 0) ans++, mp[x-1]++;
		else mp[x]--, mp[x-1]++;
	}
	cout << ans;
}
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