52(2023.12.23)(洛谷排序，第k大）

#include
using namespace std;
int main()
{
	int arr[1000] = {};
	int n, m;
	cin >> n >> m;
	int number;
	for (int i = 0;i < m;i++)
	{
		cin >> number;
		arr[number -1] += 1;
	}
	for (int i = 0;i < n;i++)
	{
		for (int j = 0;j < arr[i];j++)
		{
			cout << i + 1 << " ";
		}
	}
}

 

#include
using namespace std;
#include
int main()
{
	int n;
	cin >> n;
	long number;
	listL;
	for (int i = 0;i < n;i++)
	{
		cin >> number;
		L.push_back(number);
	}
	L.sort();
	for (list::iterator it = L.begin();it != L.end();it++)
	{
		cout << *it << " ";
	}
	system("pause");
	return 0;
}

#include
using namespace std;
#include
#include
int main()
{
	int n;
	cin >> n;
	long number;
	vectorv;
	for (int i = 0;i < n;i++)
	{
		cin >> number;
		v.push_back(number);
	}
	sort(v.begin(), v.end());
	for (vector::iterator it = v.begin();it != v.end();it++)
	{
		cout << *it << " ";
	}
	system("pause");
	return 0;
}

//超时

#include
using namespace std;
#include
long arr[100000] = {};
int main()
{
	int n;
	cin >> n;
	long number;
	long temp;
	for (int i = 0;i < n;i++)
	{
		cin >> number;
		arr[i] = number;
	}
	for (int i = 0;i < n;i++)
	{
		for (int j = 0;j < n-i-1;j++)
		{
			if (arr[j] > arr[j + 1])
			{
				temp = arr[j+1];
				arr[j + 1] = arr[j];
				arr[j] = temp;
			}
		}
	}
	for (int i = 0;i < n;i++)
	{
		cout << arr[i] << " ";
	}
	system("pause");
	return 0;
}

 

#include
using namespace std;
#include
long arr[5000000] = {};
int main()
{
	int n;
	long number;
	int flag;
	cin >> n;
	cin >> flag;
	for (int i = 0;i < n;i++)
	{
		cin >> number;
		arr[i] = number;
	}
	sort(arr, arr + n);
	cout << arr[flag] << endl;
	system("pause");
	return 0;
}

#define _CRT_SECURE_NO_WARNINGS 1
#include
using namespace std;
long arr[5000000] = {};

int quicksort(int left, int right)
{
	int mid = arr[left];
	while (left < right)
	{
		while (left < right && mid <= arr[right])
			right--;
		arr[left] = arr[right];
		while (left < right && arr[left] <= mid)
			left++;
		arr[right] = arr[left];
	}
	arr[left] = mid;
	return left;
}

int find(int left, int right, int k)
{
	int temp = quicksort(left, right);
	if (temp == k)
	{
		cout << arr[temp];
	}
	else if (k - 1 < temp)
	{
		find(left, temp - 1, k);
	}
	else
	{
		find(temp + 1, right, k);
	}
	return 0;
}


int main()
{
	int n, k;
	cin >> n >> k;
	int number;
	for (int i = 0;i < n;i++)
	{
		scanf("%d", &arr[i]);
	}
	find(0, n - 1, k);
	system("pause");
	return 0;
}

 

#include
using namespace std;
#include
int arr[5000000] = {};
int main()
{
	int n, m;
	cin >> n >> m;
	for (int i = 0;i < n;i++)
	{
		scanf("%d", &arr[i]);
	}
	nth_element(arr, arr + m, arr + n);
	printf("%d", arr[m]);
	system("pause");
	return 0;
}

 

#define _CRT_SECURE_NO_WARNINGS 1
#include
using namespace std;
#include
int main()
{
	int n;
	cin >> n;
	sets;
	int num;
	for (int i = 0;i < n;i++)
	{
		scanf("%d", &num);
		s.insert(num);
	}
	cout << s.size() << endl;
	for (set::iterator it = s.begin();it != s.end();it++)
	{
		cout << *it << " ";
	}
	system("pause");
	return 0;
}

#define _CRT_SECURE_NO_WARNINGS 1
#include
#include
using namespace std;
int main()
{
	int arr[100] = {};
	int n;
	cin >> n;
	for (int i = 0;i < n;i++)
	{
		scanf("%d", &arr[i]);
	}
	sort(arr, arr + n);
	int flag = n;
	for (int i = 1;i < n;i++)
	{
		if (arr[i] == arr[i - 1])
		{
			flag--;
		}
	}
	printf("%d\n", flag);
	cout << arr[0] << " ";
	for (int i = 1;i < n;i++)
	{
		if (arr[i] != arr[i - 1])
		{
			cout << arr[i] << " ";
		}
	}
	system("pause");
	return 0;
}

 

#include
using namespace std;
#include
#include

struct Student
{
	int m_Code;
	int m_Score1;
	int m_Score2;
};
bool mycompare(const Student& s1, const Student& s2)
{
	if (s1.m_Score1 == s2.m_Score1)
	{
		if (s1.m_Score2 == s2.m_Score2)
		{
			return s1.m_Code < s2.m_Code;
		}
		return s1.m_Score2 > s2.m_Score2;
	}
	return s1.m_Score1 > s2.m_Score1;
}
int main()
{
	int n, score1, score2, code;
	cin >> n;
	vectorv;
	Student s;
	int score;
	for (int i = 0;i < n;i++)
	{
		score1 = 0;
		scanf("%d", &score);
		score2 = score;
		score1 += score;
		scanf("%d", &score);
		score1 += score;
		scanf("%d", &score);
		score1 += score;
		code = i + 1;
		s.m_Code = code;
		s.m_Score1 = score1;
		s.m_Score2 = score2;
		v.push_back(s);
	}
	sort(v.begin(), v.end(), mycompare);
	vector::iterator pos = v.begin();
	for (int i = 0;i < 5;i++)
	{
		cout << (*pos).m_Code << " " << (*pos).m_Score1 << endl;
		pos++;
	}
	system("pause");
	return 0;
}

 

#include
using namespace std;
#include
string str;
int main()
{
	int n;
	cin >> n;
	int result1;
	string result2="0";
	int code;
	int l1, l2;
	for (int i = 0;i < n;i++)
	{
		code = i + 1;
		cin >> str;
		l1 = str.length();
		l2 = result2.length();
		if (l1 > l2)
		{
			result2 = str;
			result1 = code;
		}
		else if (l2 == l1)
		{
			int start = 0;
			while (str[start] == result2[start])
			{
				start++;
			}
			if (((int)(str[start])) > ((int)(result2[start])))
			{
				result2 = str;
				result1 = code;
			}
		}
	}
	cout << result1 << endl << result2 << endl;
	system("pause");
	return 0;
}