#include <iostream>ios
#include <fstream>算法
using namespace std;spa
ifstream fin("fin.in");it
ofstream fout("fout.out");io
void Input()class
{stream
;//please written at hereco
}void
void algorithm()
{
;//please written at here
}
void Output()
{
;//please written at here
}
int main()
{
Input(); //輸入
algorithm(); //算法
Output(); //輸出
}