제출 #98756

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
98756		M_H_H_7	Baloni (COCI15_baloni)	C++14	0 / 100	97 ms	15068 KiB

baloni

//In The Name of Beauty
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef vector<ll> vll;
#define IB std::ios::sync_with_stdio(0);
#define pb(x) push_back(x);
#define mp(x,y) make_pair(x,y)
#define pll pair<ll,ll>
#define F first
#define S second
ll const MAXN = 1e6 + 8;
ll const INF  = 1e12 + 8;
ll const delta = 1000000007;
ll a[MAXN];
ll last[MAXN];
int main()
{
    IB;
    cin.tie(0);
    cout.tie(0);
    ll n;
    cin >> n;
    for(ll i = 0;i < MAXN;i++)last[i] = -1;
    for(ll i = 1;i <= n;i++)cin >> a[i];
    ll ans = 0;
    for(ll i = n;i >= 1;i--)
    {
        ll t = a[i];
        last[t] = i;
        if(last[t - 1] == -1)ans++;
        else last[t - 1] = -1;
    }
    cout << ans;
    return 0;
}
//Written by M_H_H_7

• Subtask 1: 0 / 100