제출 #1029995

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1029995		Khanhcsp2	Po (COCI21_po)	C++14	0 / 70	9 ms	2224 KiB

Main

#include<bits/stdc++.h>
#define el '\n'
#define fi first
#define sc second
#define int ll
#define pii pair<int, int>
#define all(v) v.begin(), v.end()
using namespace std;
using ll=long long;
using ull=unsigned long long;
using ld=long double;
const int mod=1e9+7;
const int N=2e5+11;
stack<int> s;
int n, a[N];
void sol()
{
    cin >> n;
    for(int i=1;i<=n;i++) cin >> a[i];
    int ans=0;
    for(int i=1;i<=n;i++)
    {
        while(!s.empty() && s.top()>a[i]) s.pop();
        if(s.empty()) s.push(a[i]);
        else if(s.top()<a[i]) ans++;
    }
    cout << ans;
}
signed main()
{
//    freopen("divisor.INP", "r", stdin);
//    freopen("divisor.OUT", "w", stdout);
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int t=1;
    //cin >> t;
    while(t--)
    {
        sol();
    }
}

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