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// Input: N, Y ---> Output Several Numbers' Sum == Y
#include <vector>
#include <iostream>
#include <algorithm>
#include <functional>
#include <cstring>
#include <cstdlib>

using namespace std;

skyzh

#include<iostream>
#include<cstdlib>

namespace Test
{
	class TB;
	class TA
	{
	public:
		TB *b;

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//Big Number Calculation
//You can Add, Subtract or Multiply a BigNumber.
//What's more, all the calculations are done in base 10000 system. SPEED UP!!!
//You can adjust base system by changing NUM_PER_BIT and NUM_PER_BIT_BIT.

#include<iostream>
#include<sstream>
#include<iomanip>
#include<string>
#include<cstring>

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//Splay Tree
//An array mainly used to do "Flip" action
//You can build Splay Tree by running 'SplayTree::Create(TreeSize)', and then you'll have an array with numbers '1 2 3 ... n'
//You can flip a block of numbers by running 'Tree->Flip(L,R)'. Notice, L and R are counted from 0.
//You can print all the numbers in Tree by running 'Tree->TryPrint()'. Also you can get the Nth number by running 'Tree->FindNth(pos)'
//This is an incomplete example.

#include <iostream>
#include <algorithm>
#include <vector>

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//Prim - Minimum spanning tree

#include<iostream>
#include<algorithm>
#include<functional>
#include<set>
#include<vector>
#include<queue>
#include<cstring>

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//Modular Arithmetic Calculator(According to Fermat's little theorem)
//So some of the calculations can not be done.
//Also can be used as Expression Calculator if change "ModNumber" to INT_MAX in CalculationElement Class

#include <algorithm>
#include <stack>
#include <list>
#include <vector>
#include <map>

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//Drag your file on the excutive file
//C++
#include <algorithm>
#include <map>
#include <functional>
#include <vector>
#include <list>
#include <queue>
#include <stack>
#include <bitset>