제출 #515959

#제출 시각아이디문제언어결과실행 시간메모리
515959KoDPo (COCI21_po)C++17
70 / 70
9 ms720 KiB
#include <bits/stdc++.h>

using std::vector;
using std::array;
using std::pair;
using std::tuple;

int main() {
    std::ios_base::sync_with_stdio(false);
    std::cin.tie(nullptr);
    int N;
    std::cin >> N;
    vector<int> val;
    val.push_back(0);
    int ans = 0;
    while (N--) {
        int x;
        std::cin >> x;
        while (val.back() > x) {
            ans += 1;
            val.pop_back();
        }
        if (val.back() != x) {
            val.push_back(x);
        }
    }
    ans += val.size() - 1;
    std::cout << ans << '\n';
    return 0;
}
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