Submission #1030002

#	Time	Username	Problem	Language	Result	Execution time	Memory
1030002		Khanhcsp2	Po (COCI21_po)	C++14	20 / 70	12 ms	2476 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++)
    {
        if(!s.empty() && s.top()>a[i]) s.pop();
        if(s.empty() || s.top()!=a[i]) ans++, s.push(a[i]);
    }
    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();
    }
}

• Subtask 1: 20 / 70