Submission #227718

#	Time	Username	Problem	Language	Result	Execution time	Memory
227718		blacktulip	Table Tennis (info1cup20_tabletennis)	C++17	9 / 100	3115 ms	506256 KiB

tabletennis

#include <bits/stdc++.h>

using namespace std;

typedef long long lo;
typedef pair< lo,lo > PII;

#define fi first
#define se second
#define mp make_pair
#define pb push_back
#define int long long
#define fio() ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL)
#define FOR for(int i=1;i<=n;i++)
#define mid ((start+end)/2)
#define ort ((bas+son)/2)

const lo MAX = -1000000000000000000;
const lo MIN = 1000000000000000000;
const lo inf = 1000000000;
const lo KOK = 100000;
const lo LOG = 30;
const lo li = 500005;
const lo mod = 1000000007;

int n,m,b[li],a[li],k,flag,t,sum;
int cev;
string s;
map<int,int> mpp;
vector<int> v;

main(void){
	scanf("%lld %lld",&n,&k);
	FOR scanf("%lld",&a[i]);
	FOR{
		for(int j=i+1;j<=n;j++){
			mpp[a[i]+a[j]]++;
			if(mpp[a[i]+a[j]]==n/2){sum=a[i]+a[j];break;}
		}
		if(sum)break;
	}
	int bas=1;
	int son=n;
	while(bas<=n/2){
		flag=0;
		for(int i=son;i>=1;i--){
			if(a[bas]+a[i]==sum){flag=1;v.pb(a[bas]);v.pb(a[i]);son=i-1;bas++;break;}
		}
		if(!flag){bas++;n+=2;}
	}
	sort(v.begin(),v.end());
	for(int i=0;i<(int)v.size();i++){
		printf("%lld ",v[i]);
	}
	return 0;
}

Compilation message (stderr)

tabletennis.cpp:32:10: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main(void){
          ^
tabletennis.cpp: In function 'int main()':
tabletennis.cpp:33:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%lld %lld",&n,&k);
  ~~~~~^~~~~~~~~~~~~~~~~~~
tabletennis.cpp:34:11: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  FOR scanf("%lld",&a[i]);
      ~~~~~^~~~~~~~~~~~~~

• Subtask 1: 0 / 11
• Subtask 2: 0 / 9
• Subtask 3: 0 / 14
• Subtask 4: 0 / 15
• Subtask 5: 9 / 9
• Subtask 6: 0 / 14
• Subtask 7: 0 / 15
• Subtask 8: 0 / 13