Submission #383191

#	Time	Username	Problem	Language	Result	Execution time	Memory
383191		ogibogi2004	Naan (JOI19_naan)	C++14	0 / 100	4 ms	624 KiB

naan

#include<bits/stdc++.h>
using namespace std;
#define ll long long
ll n,l;
ll v[2048][2048];
pair<ll,ll> p[2048][2048];
bool cmp(pair<ll,ll> p1,pair<ll,ll> p2)
{
	return p1.first*p2.second<p1.second*p2.first;
}
bool used[2048];
int main()
{
	cin>>n>>l;
	for(int i=1;i<=n;i++)
	{
		for(int j=1;j<=l;j++)
		{
			cin>>v[i][j];
		}
	}
	for(int i=1;i<=n;i++)
	{
		ll sum=0;
		for(ll j=1;j<=l;j++)
		{
			sum+=v[i][j];
		}
		ll sumv=0,needed;
		ll r=1;
		for(ll j=1;j<n;j++)
		{
			needed=sum*j;
			while(sumv+v[i][r]*n<=needed)
			{
				sumv+=v[i][r]*n;
				r++;
			}
			p[i][j]={(r-1)*v[i][r]*n+needed-sumv,n*v[i][r]};
		}
	}
	vector<int>ans;
	for(int i=1;i<n;i++)
	{
		bool found=0;
		pair<ll,ll> best;
		ll idx;
		for(int j=1;j<=n;j++)
		{
			if(used[j])continue;
			if(!found||cmp(p[i][j],best))
			{
				best=p[i][j];found=1;
				idx=j;
			}
		}
		cout<<p[i][idx].first<<" "<<p[i][idx].second<<endl;
		used[idx]=1;
		ans.push_back(idx);
	}
	for(int i=1;i<=n;i++)if(!used[i])ans.push_back(i);
	for(auto xd:ans)
	{
		cout<<xd<<" ";
	}
	cout<<endl;
return 0;
}

Compilation message (stderr)

naan.cpp: In function 'int main()':
naan.cpp:59:16: warning: 'idx' may be used uninitialized in this function [-Wmaybe-uninitialized]
   59 |   ans.push_back(idx);
      |   ~~~~~~~~~~~~~^~~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 24
• Subtask 3: 0 / 71