Submission #76850

#	Time	Username	Problem	Language	Result	Execution time	Memory
76850		zetapi	Gift (IZhO18_nicegift)	C++14	30 / 100	2049 ms	104296 KiB

nicegift

#include "bits/stdc++.h"
using namespace std;

#define pb  push_back
#define mp  make_pair
#define	int long long
#define itr iterator

typedef pair<int,int> pii;

const int MAX=5e6;

set<pii> st;

set<pii>::itr it_1,it_2;

vector<int> res;

int N,K,sum,arr[MAX];

void print_1()
{
	assert(!(st.size()%K));
	while(!st.empty())
	{	
		res.pb(st.begin()->second);
		st.erase(st.begin());
	}
	cout<<res.size()/K<<"\n";
	for(int A=0;A<res.size();A+=K)
	{
		cout<<1<<" ";
		for(int B=A;B<A+K;B++)
			cout<<res[B]<<" ";
		cout<<"\n";
	}
	return ;
}

signed main()
{
	ios_base::sync_with_stdio(false);

	cin>>N>>K;
	for(int A=1;A<=N;A++)
	{
		cin>>arr[A];
		sum+=arr[A];
		if(arr[A])
			st.insert(mp(-arr[A],A));
	}
	if(sum%K)
		return cout<<-1,0;
	vector<pii> lol(K);
	while(true)
	{
		if(st.size()<K)
			return cout<<-1,0;
		if(st.begin()->first==-1)
		{
			print_1();
			break;
		}
		for(int A=0;A<K;A++)
		{
			lol[A]=*st.begin();
			st.erase(st.begin());
		}
		for(int A=0;A<K;A++)
		{
			lol[A].first++;
			if(lol[A].first!=0)
				st.insert(lol[A]);
			res.pb(lol[A].second);
		}
		/*for(auto A:st)
			cout<<-A.first<<" ";
		cout<<"\n";*/
	}
	return 0;
}

Compilation message (stderr)

nicegift.cpp: In function 'void print_1()':
nicegift.cpp:30:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int A=0;A<res.size();A+=K)
              ~^~~~~~~~~~~
nicegift.cpp: In function 'int main()':
nicegift.cpp:57:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if(st.size()<K)
      ~~~~~~~~~^~

• Subtask 1: 7 / 7
• Subtask 2: 11 / 11
• Subtask 3: 12 / 12
• Subtask 4: 0 / 19
• Subtask 5: 0 / 51