제출 #357892

#제출 시각아이디문제언어결과실행 시간메모리
357892beepbeepsheepBaloni (COCI15_baloni)C++17
100 / 100
71 ms11884 KiB

#include <bits/stdc++.h>

using namespace std;
#define ll long long

const ll bignum=1e17;
const int inf= 2e9;
const int mod= 1e9+7;


ll arr[1000001];
int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    memset(arr,0,sizeof(arr));
    ll n,ele,ans=0;
    cin>>n;
    for (int i=0;i<n;i++){
        cin>>ele;
        if (arr[ele]==0){
            ans++;
            arr[ele-1]++;
        }
        else{
            arr[ele]--;
            arr[ele-1]++;
        }
    }
    cout<<ans;
    return 0;
}
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