Submission #259682

#	Time	Username	Problem	Language	Result	Execution time	Memory
259682		arnold518	Worst Reporter 2 (JOI16_worst_reporter2)	C++14	0 / 100	3 ms	4992 KiB

worst_reporter2

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

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

const int MAXN = 2e5;

int N;
pii A[MAXN+10], B[MAXN+10];
vector<int> V[MAXN+10];
int cnt[MAXN+10], P[MAXN+10];

int main()
{
	scanf("%d", &N);
	for(int i=1; i<=N; i++) scanf("%d%d", &A[i].second, &A[i].first);
	for(int i=1; i<=N; i++) scanf("%d%d", &B[i].second, &B[i].first);

	sort(A+1, A+N+1);
	sort(B+1, B+N+1);

	for(int i=1, j=1; i<=N; i++)
	{
		for(; j<=N && A[j].first<=B[i].first; j++) V[i].push_back(A[j].second);
		P[i]=B[i].second;
	}

	int ans=0;
	for(int i=0; i<(1<<N); i++)
	{
		for(int j=1; j<=N; j++) cnt[j]=0;
		bool flag=true;
		for(int j=1; j<=N; j++)
		{
			for(auto it : V[j]) cnt[it]++;
			if(i&(1<<(j-1)))
			{
				if(cnt[P[j]]==0) flag=false;
				cnt[P[j]]--;
			}
		}
		if(flag) ans=max(ans, __builtin_popcount(i));
	}
	printf("%d\n", N-ans);
}

Compilation message (stderr)

worst_reporter2.cpp: In function 'int main()':
worst_reporter2.cpp:17:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &N);
  ~~~~~^~~~~~~~~~
worst_reporter2.cpp:18:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(int i=1; i<=N; i++) scanf("%d%d", &A[i].second, &A[i].first);
                          ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
worst_reporter2.cpp:19:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(int i=1; i<=N; i++) scanf("%d%d", &B[i].second, &B[i].first);
                          ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 15
• Subtask 2: 0 / 15
• Subtask 3: 0 / 30
• Subtask 4: 0 / 40