Submission #374080

#	Time	Username	Problem	Language	Result	Execution time	Memory
374080		Nimbostratus	Baloni (COCI15_baloni)	C++17	100 / 100	157 ms	55660 KiB

baloni

#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define ppb pop_back
#define ub upper_bound
#define lb lower_bound
#define clean(a,s) memset((a),0,sizeof((a)[0])*(s))
#define all(x) (x).begin() , (x).end()
#define fi first
#define se second
#define int int
using pii = pair<int,int>;
using ll = long long;
const int maxn = 1e6+5;
const int inf = 2e9;
const int mod = 1e9+7;

int n,a[maxn],ans;
vector<int> occ[maxn],occ2[maxn];

int32_t main () {
	//freopen("in","r",stdin); freopen("out","w",stdout);
	ios_base::sync_with_stdio(0); cout.tie(0); cin.tie(0);
	cin >> n;
	for(int i=1;i<=n;i++) cin >> a[i] , occ[a[i]].pb(i);
	for(int i=1;i<=maxn-5;i++)
		if(!occ[i].empty())
			reverse(all(occ[i]));
	ans = 1;
	for(int i=2;i<=n;i++) {
		if(occ[a[i]+1].empty() || occ[a[i]+1].back() > i) {
			ans++;
			continue;
		}
		occ[a[i]+1].ppb();
	}
	cout << ans << endl;
}	
	

• Subtask 1: 100 / 100