Submission #168876

#	Time	Username	Problem	Language	Result	Execution time	Memory
168876		Asamu13	Baloni (COCI15_baloni)	C++14	100 / 100	1202 ms	96060 KiB

baloni

#include<bits/stdc++.h>
#define inf INT_MAX
#define sc(a) scanf("%d",&a)
#define scc(a,b) scanf("%d %d",&a,&b)
#define sccc(a,b,c) scanf("%d %d %d",&a,&b,&c)
#define pf(a) printf("%d",a)
#define pff(a,b) printf("%d %d",a,b)
#define pfff(a,b,c) printf("%d %d %d",a,b,c)
#define pb(a) push_back(a)
#define em empty()
#define fr front()
#define cl clear()
#define sz size()
#define mp(a,b) make_pair(a,b)
#define fri(b) freopen(b,"r",stdin)
#define fro(b) freopen(b,"w",stdout)
/*
ID: uslusam1
TASK: test
LANG: C++
*/
 
 
using namespace std;

set<int> st[1000013];
int arr[1000013];
int ans;
set<int> :: iterator it1,it2;


int main(){
	//fri("gir.txt");
	//fro("cik.txt");
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	cout.tie(NULL);
	int n;
	cin>>n;
	for(int i=1;i<=n;i++){
		cin>>arr[i];
		st[arr[i]].insert(i);
	}
	for(int i=1;i<=n;i++){
		if(st[arr[i]].count(i)==0){
			continue;
		}
		else{
			ans++;
			int pos=i;
			it1=st[arr[i]].find(i);
			int ctr=arr[i];
			while(pos>0){
				st[ctr].erase(it1);
				it1=st[arr[pos]-1].lower_bound(pos);
				if(it1==st[arr[pos]-1].end()){
					break;
				}
				else{
					ctr=arr[pos]-1;
					pos=*it1;
				}
			}
		}
	}
	cout<<ans<<endl;

	return 0;
}

• Subtask 1: 100 / 100