제출 #1332813

#제출 시각아이디문제언어결과실행 시간메모리
1332813Zone_zoneeBaloni (COCI15_baloni)C++20
0 / 100
51 ms8664 KiB
#include <bits/stdc++.h>
using namespace std;
const int N = 1e6+10;

int a[N], idx[N];
vector<int> q[N];
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    int n;
    cin >> n;
    for(int i = 1; i <= n; ++i){
        cin >> a[i];
        q[a[i]].push_back(i);
    }
    int ans = 0;
    for(int i = 1; i <= n; ++i){
        if(idx[a[i]] >= q[a[i]].size() || q[a[i]].front() != i) continue;
        while(idx[a[i]] < q[a[i]].size() && q[a[i]].front() >= i) idx[a[i]--]++;
        ans++;
    }
    cout << ans << '\n';
}
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