Submission #346833

#	Time	Username	Problem	Language	Result	Execution time	Memory
346833		arnold518	Table Tennis (info1cup20_tabletennis)	C++14	100 / 100	1483 ms	16496 KiB

tabletennis

#include <bits/stdc++.h>
using namespace std;
 
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
 
const int MAXN = 15e4+400;
const int MAXK = 400;
const int MOD = 3000000+1;
 
int N, K, A[MAXN+10];
int B[MOD+10];
 
int main()
{
	scanf("%d%d", &N, &K);
	for(int i=1; i<=N+K; i++) scanf("%d", &A[i]);
 		
 	int tt=-1;
	for(int i=1; i<=N+K; i++)
	{
		int t=N+K-i+1;
		for(int j=max(i+1, t-K); j<=min(N+K, t+K); j++)
		{
			B[(A[i]+A[j])%MOD]+=2;
			if(B[(A[i]+A[j])%MOD]>=N)
			{
				tt=(A[i]+A[j])%MOD;
				break;
			}
		}
		if(tt!=-1) break;
	}

	vector<int> V;
	for(int i=1; i<=N+K; i++)
	{
		int t=N+K-i+1;
		for(int j=max(i+1, t-K); j<=min(N+K, t+K); j++)
		{
			if((A[i]+A[j])%MOD==tt)
			{
				V.push_back(A[i]);
				V.push_back(A[j]);
			}
			if(V.size()>=N) break;
		}
		if(V.size()>=N) break;
	}
	sort(V.begin(), V.end());
	for(auto it : V) printf("%d ", it);
	printf("\n");
}

Compilation message (stderr)

tabletennis.cpp: In function 'int main()':
tabletennis.cpp:47:15: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   47 |    if(V.size()>=N) break;
      |       ~~~~~~~~^~~
tabletennis.cpp:49:14: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   49 |   if(V.size()>=N) break;
      |      ~~~~~~~~^~~
tabletennis.cpp:17:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   17 |  scanf("%d%d", &N, &K);
      |  ~~~~~^~~~~~~~~~~~~~~~
tabletennis.cpp:18:33: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   18 |  for(int i=1; i<=N+K; i++) scanf("%d", &A[i]);
      |                            ~~~~~^~~~~~~~~~~~~

• Subtask 1: 11 / 11
• Subtask 2: 9 / 9
• Subtask 3: 14 / 14
• Subtask 4: 15 / 15
• Subtask 5: 9 / 9
• Subtask 6: 14 / 14
• Subtask 7: 15 / 15
• Subtask 8: 13 / 13