Submission #309001

#	Time	Username	Problem	Language	Result	Execution time	Memory
309001		giorgigagua2006	Exercise Deadlines (CCO20_day1problem2)	C++17	25 / 25	231 ms	16248 KiB

Main

#include<bits/stdc++.h>
using namespace std;
long long  f[222312],N=222312,p,k;
priority_queue<long long>q;
void upd(int i, int value)
{
	while(i<N)
	{
		f[i]+=value;
		i+=(i & -i);
	}
}

int sum(int i)
{
	int s=0;
	while(i)
	{
		s+=f[i];
		i-=(i & -i);
	}
	return s;
}

long long i,j,mx,ans,n;
long long d[223123];
vector<long long>v[213213];
int main()
{
	cin>>n;
	for(i=1;i<=n;i++)
	{
		cin>>d[i];
		v[d[i]].push_back(i);
	}
	for(i=1;i<=n;i++) 
	upd(i,1);
	for(i=n;i>0;i--)
	{
		for(j=0;j<v[i].size();j++)
		q.push(v[i][j]);
		if(q.size()==0)
		{
			cout<<-1;
			return 0;
		}
		mx=q.top();
		q.pop();
		upd(n-mx+1,-1);
        ans+=sum(n-mx+1);
	}
	cout<<ans;
	
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:40:12: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int, std::allocator<long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |   for(j=0;j<v[i].size();j++)
      |           ~^~~~~~~~~~~~

• Subtask 1: 17 / 17
• Subtask 2: 8 / 8