제출 #590010

#제출 시각아이디문제언어결과실행 시간메모리
5900100123xxBaloni (COCI15_baloni)C++14
0 / 100
67 ms3700 KiB
#include <bits/stdc++.h>
using namespace std;
int n, ar[1000005], freq[1000005], ans;
int main(){
    ios::sync_with_stdio(false);
    cin.tie(0); cout.tie(0);
    cin >> n;
    for (int i = 1; i<= n; i++){
        cin >> ar[i];
        if (freq[ar[i]+1] == 0){
            freq[ar[i]+1]--;
        }
        else{
            ans++;
        }
        freq[ar[i]]++;
    }
    cout << ans << "\n";
}
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