Submission #274680

#	Time	Username	Problem	Language	Result	Execution time	Memory
274680		arnold518	Teams (CEOI11_tea)	C++14	50 / 100	2586 ms	18040 KiB

tea

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

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

const int MAXN = 1e6;
const int INF = 987654321;

int N, A[MAXN+10];
pii B[MAXN+10];
pii dp[MAXN+10];
int memo[MAXN+10];

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

	for(int i=1; i<=N; i++)
	{
		dp[i]={-INF, INF}; memo[i]=-1;
		for(int j=0; i-j>=B[i].first; j++)
		{
			pii t=dp[j];
			t.first++; t.second=max(t.second, i-j);
			if(t.first>dp[i].first) dp[i]=t, memo[i]=j;
			else if(t.first==dp[i].first && t.second<dp[i].second) dp[i]=t, memo[i]=j;
		}
	}

	printf("%d\n", dp[N].first);
	int now=N;
	while(now)
	{
		printf("%d ", now-memo[now]);
		for(int i=now; i>memo[now]; i--) printf("%d ", B[i].second);
		printf("\n"); now=memo[now];
	}
}

Compilation message (stderr)

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

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10